StringUtilsTest.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.lang3;
import static org.apache.commons.lang3.LangAssertions.assertIllegalArgumentException;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.function.Supplier;
import java.util.regex.PatternSyntaxException;
import org.apache.commons.lang3.function.Suppliers;
import org.apache.commons.lang3.mutable.MutableInt;
import org.apache.commons.lang3.text.WordUtils;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
import org.junitpioneer.jupiter.DefaultLocale;
import org.junitpioneer.jupiter.ReadsDefaultLocale;
import org.junitpioneer.jupiter.WritesDefaultLocale;
/**
* Tests for methods of {@link StringUtils}
* which been moved to their own test classes.
*/
@SuppressWarnings("deprecation") // deliberate use of deprecated code
class StringUtilsTest extends AbstractLangTest {
static final String WHITESPACE;
static final String NON_WHITESPACE;
static final String HARD_SPACE;
static final String TRIMMABLE;
static final String NON_TRIMMABLE;
static {
final StringBuilder ws = new StringBuilder();
final StringBuilder nws = new StringBuilder();
final String hs = String.valueOf((char) 160);
final StringBuilder tr = new StringBuilder();
final StringBuilder ntr = new StringBuilder();
for (int i = 0; i < Character.MAX_VALUE; i++) {
if (Character.isWhitespace((char) i)) {
ws.append((char) i);
if (i > 32) {
ntr.append((char) i);
}
} else if (i < 40) {
nws.append((char) i);
}
}
for (int i = 0; i <= 32; i++) {
tr.append((char) i);
}
WHITESPACE = ws.toString();
NON_WHITESPACE = nws.toString();
HARD_SPACE = hs;
TRIMMABLE = tr.toString();
NON_TRIMMABLE = ntr.toString();
}
private static final String[] ARRAY_LIST = {"foo", "bar", "baz"};
private static final String[] EMPTY_ARRAY_LIST = {};
private static final String[] NULL_ARRAY_LIST = {null};
private static final Object[] NULL_TO_STRING_LIST = {
new Object() {
@Override
public String toString() {
return null;
}
}
};
private static final String[] MIXED_ARRAY_LIST = {null, "", "foo"};
private static final Object[] MIXED_TYPE_LIST = {"foo", Long.valueOf(2L)};
private static final long[] LONG_PRIM_LIST = {1, 2};
private static final int[] INT_PRIM_LIST = {1, 2};
private static final byte[] BYTE_PRIM_LIST = {1, 2};
private static final short[] SHORT_PRIM_LIST = {1, 2};
private static final char[] CHAR_PRIM_LIST = {'1', '2'};
private static final float[] FLOAT_PRIM_LIST = {1, 2};
private static final double[] DOUBLE_PRIM_LIST = {1, 2};
private static final List<String> MIXED_STRING_LIST = Arrays.asList(null, "", "foo");
private static final List<Object> MIXED_TYPE_OBJECT_LIST = Arrays.<Object>asList("foo", Long.valueOf(2L));
private static final List<String> STRING_LIST = Arrays.asList("foo", "bar", "baz");
private static final List<String> EMPTY_STRING_LIST = Collections.emptyList();
private static final List<String> NULL_STRING_LIST = Collections.singletonList(null);
private static final String SEPARATOR = ",";
private static final char SEPARATOR_CHAR = ';';
private static final char COMMA_SEPARATOR_CHAR = ',';
private static final String TEXT_LIST = "foo,bar,baz";
private static final String TEXT_LIST_CHAR = "foo;bar;baz";
private static final String TEXT_LIST_NOSEP = "foobarbaz";
private static final String FOO_UNCAP = "foo";
private static final String FOO_CAP = "Foo";
private static final String SENTENCE_UNCAP = "foo bar baz";
private static final String SENTENCE_CAP = "Foo Bar Baz";
private static final boolean[] EMPTY = {};
private static final boolean[] ARRAY_FALSE_FALSE = {false, false};
private static final boolean[] ARRAY_FALSE_TRUE = {false, true};
private static final boolean[] ARRAY_FALSE_TRUE_FALSE = {false, true, false};
private void innerTestSplit(final char separator, final String sepStr, final char noMatch) {
final String msg = "Failed on separator hex(" + Integer.toHexString(separator) +
"), noMatch hex(" + Integer.toHexString(noMatch) + "), sepStr(" + sepStr + ")";
final String str = "a" + separator + "b" + separator + separator + noMatch + "c";
String[] res;
// (str, sepStr)
res = StringUtils.split(str, sepStr);
assertEquals(3, res.length, msg);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals(noMatch + "c", res[2]);
final String str2 = separator + "a" + separator;
res = StringUtils.split(str2, sepStr);
assertEquals(1, res.length, msg);
assertEquals("a", res[0], msg);
res = StringUtils.split(str, sepStr, -1);
assertEquals(3, res.length, msg);
assertEquals("a", res[0], msg);
assertEquals("b", res[1], msg);
assertEquals(noMatch + "c", res[2], msg);
res = StringUtils.split(str, sepStr, 0);
assertEquals(3, res.length, msg);
assertEquals("a", res[0], msg);
assertEquals("b", res[1], msg);
assertEquals(noMatch + "c", res[2], msg);
res = StringUtils.split(str, sepStr, 1);
assertEquals(1, res.length, msg);
assertEquals(str, res[0], msg);
res = StringUtils.split(str, sepStr, 2);
assertEquals(2, res.length, msg);
assertEquals("a", res[0], msg);
assertEquals(str.substring(2), res[1], msg);
}
private void innerTestSplitPreserveAllTokens(final char separator, final String sepStr, final char noMatch) {
final String msg = "Failed on separator hex(" + Integer.toHexString(separator) +
"), noMatch hex(" + Integer.toHexString(noMatch) + "), sepStr(" + sepStr + ")";
final String str = "a" + separator + "b" + separator + separator + noMatch + "c";
String[] res;
// (str, sepStr)
res = StringUtils.splitPreserveAllTokens(str, sepStr);
assertEquals(4, res.length, msg);
assertEquals("a", res[0], msg);
assertEquals("b", res[1], msg);
assertEquals("", res[2], msg);
assertEquals(noMatch + "c", res[3], msg);
final String str2 = separator + "a" + separator;
res = StringUtils.splitPreserveAllTokens(str2, sepStr);
assertEquals(3, res.length, msg);
assertEquals("", res[0], msg);
assertEquals("a", res[1], msg);
assertEquals("", res[2], msg);
res = StringUtils.splitPreserveAllTokens(str, sepStr, -1);
assertEquals(4, res.length, msg);
assertEquals("a", res[0], msg);
assertEquals("b", res[1], msg);
assertEquals("", res[2], msg);
assertEquals(noMatch + "c", res[3], msg);
res = StringUtils.splitPreserveAllTokens(str, sepStr, 0);
assertEquals(4, res.length, msg);
assertEquals("a", res[0], msg);
assertEquals("b", res[1], msg);
assertEquals("", res[2], msg);
assertEquals(noMatch + "c", res[3], msg);
res = StringUtils.splitPreserveAllTokens(str, sepStr, 1);
assertEquals(1, res.length, msg);
assertEquals(str, res[0], msg);
res = StringUtils.splitPreserveAllTokens(str, sepStr, 2);
assertEquals(2, res.length, msg);
assertEquals("a", res[0], msg);
assertEquals(str.substring(2), res[1], msg);
}
/**
* Tests {@code appendIfMissing}.
*/
@Test
void testAppendIfMissing() {
assertNull(StringUtils.appendIfMissing(null, null), "appendIfMissing(null,null)");
assertEquals("abc", StringUtils.appendIfMissing("abc", null), "appendIfMissing(abc,null)");
assertEquals("xyz", StringUtils.appendIfMissing("", "xyz"), "appendIfMissing(\"\",xyz)");
assertEquals("abcxyz", StringUtils.appendIfMissing("abc", "xyz"), "appendIfMissing(abc,xyz)");
assertEquals("abcxyz", StringUtils.appendIfMissing("abcxyz", "xyz"), "appendIfMissing(abcxyz,xyz)");
assertEquals("aXYZxyz", StringUtils.appendIfMissing("aXYZ", "xyz"), "appendIfMissing(aXYZ,xyz)");
assertNull(StringUtils.appendIfMissing(null, null, (CharSequence[]) null), "appendIfMissing(null,null,null)");
assertEquals("abc", StringUtils.appendIfMissing("abc", null, (CharSequence[]) null), "appendIfMissing(abc,null,null)");
assertEquals("xyz", StringUtils.appendIfMissing("", "xyz", (CharSequence[]) null), "appendIfMissing(\"\",xyz,null))");
assertEquals("abcxyz", StringUtils.appendIfMissing("abc", "xyz", (CharSequence) null), "appendIfMissing(abc,xyz,{null})");
assertEquals("abc", StringUtils.appendIfMissing("abc", "xyz", ""), "appendIfMissing(abc,xyz,\"\")");
assertEquals("abcxyz", StringUtils.appendIfMissing("abc", "xyz", "mno"), "appendIfMissing(abc,xyz,mno)");
assertEquals("abcxyz", StringUtils.appendIfMissing("abcxyz", "xyz", "mno"), "appendIfMissing(abcxyz,xyz,mno)");
assertEquals("abcmno", StringUtils.appendIfMissing("abcmno", "xyz", "mno"), "appendIfMissing(abcmno,xyz,mno)");
assertEquals("abcXYZxyz", StringUtils.appendIfMissing("abcXYZ", "xyz", "mno"), "appendIfMissing(abcXYZ,xyz,mno)");
assertEquals("abcMNOxyz", StringUtils.appendIfMissing("abcMNO", "xyz", "mno"), "appendIfMissing(abcMNO,xyz,mno)");
}
/**
* Tests {@code appendIfMissingIgnoreCase}.
*/
@Test
void testAppendIfMissingIgnoreCase() {
assertNull(StringUtils.appendIfMissingIgnoreCase(null, null), "appendIfMissingIgnoreCase(null,null)");
assertEquals("abc", StringUtils.appendIfMissingIgnoreCase("abc", null), "appendIfMissingIgnoreCase(abc,null)");
assertEquals("xyz", StringUtils.appendIfMissingIgnoreCase("", "xyz"), "appendIfMissingIgnoreCase(\"\",xyz)");
assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abc", "xyz"), "appendIfMissingIgnoreCase(abc,xyz)");
assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abcxyz", "xyz"), "appendIfMissingIgnoreCase(abcxyz,xyz)");
assertEquals("abcXYZ", StringUtils.appendIfMissingIgnoreCase("abcXYZ", "xyz"), "appendIfMissingIgnoreCase(abcXYZ,xyz)");
assertNull(StringUtils.appendIfMissingIgnoreCase(null, null, (CharSequence[]) null), "appendIfMissingIgnoreCase(null,null,null)");
assertEquals("abc", StringUtils.appendIfMissingIgnoreCase("abc", null, (CharSequence[]) null), "appendIfMissingIgnoreCase(abc,null,null)");
assertEquals("xyz", StringUtils.appendIfMissingIgnoreCase("", "xyz", (CharSequence[]) null), "appendIfMissingIgnoreCase(\"\",xyz,null)");
assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abc", "xyz", (CharSequence) null), "appendIfMissingIgnoreCase(abc,xyz,{null})");
assertEquals("abc", StringUtils.appendIfMissingIgnoreCase("abc", "xyz", ""), "appendIfMissingIgnoreCase(abc,xyz,\"\")");
assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abc", "xyz", "mno"), "appendIfMissingIgnoreCase(abc,xyz,mno)");
assertEquals("abcxyz", StringUtils.appendIfMissingIgnoreCase("abcxyz", "xyz", "mno"), "appendIfMissingIgnoreCase(abcxyz,xyz,mno)");
assertEquals("abcmno", StringUtils.appendIfMissingIgnoreCase("abcmno", "xyz", "mno"), "appendIfMissingIgnoreCase(abcmno,xyz,mno)");
assertEquals("abcXYZ", StringUtils.appendIfMissingIgnoreCase("abcXYZ", "xyz", "mno"), "appendIfMissingIgnoreCase(abcXYZ,xyz,mno)");
assertEquals("abcMNO", StringUtils.appendIfMissingIgnoreCase("abcMNO", "xyz", "mno"), "appendIfMissingIgnoreCase(abcMNO,xyz,mno)");
}
@Test
void testCapitalize() {
assertNull(StringUtils.capitalize(null));
assertEquals("", StringUtils.capitalize(""), "capitalize(empty-string) failed");
assertEquals("X", StringUtils.capitalize("x"), "capitalize(single-char-string) failed");
assertEquals(FOO_CAP, StringUtils.capitalize(FOO_CAP), "capitalize(String) failed");
assertEquals(FOO_CAP, StringUtils.capitalize(FOO_UNCAP), "capitalize(string) failed");
assertEquals("\u01C8", StringUtils.capitalize("\u01C9"), "capitalize(String) is not using TitleCase");
// Javadoc examples
assertNull(StringUtils.capitalize(null));
assertEquals("", StringUtils.capitalize(""));
assertEquals("Cat", StringUtils.capitalize("cat"));
assertEquals("CAt", StringUtils.capitalize("cAt"));
assertEquals("'cat'", StringUtils.capitalize("'cat'"));
}
@Test
void testCenter_StringInt() {
assertNull(StringUtils.center(null, -1));
assertNull(StringUtils.center(null, 4));
assertEquals(" ", StringUtils.center("", 4));
assertEquals("ab", StringUtils.center("ab", 0));
assertEquals("ab", StringUtils.center("ab", -1));
assertEquals("ab", StringUtils.center("ab", 1));
assertEquals(" ", StringUtils.center("", 4));
assertEquals(" ab ", StringUtils.center("ab", 4));
assertEquals("abcd", StringUtils.center("abcd", 2));
assertEquals(" a ", StringUtils.center("a", 4));
assertEquals(" a ", StringUtils.center("a", 5));
}
@Test
void testCenter_StringIntChar() {
assertNull(StringUtils.center(null, -1, ' '));
assertNull(StringUtils.center(null, 4, ' '));
assertEquals(" ", StringUtils.center("", 4, ' '));
assertEquals("ab", StringUtils.center("ab", 0, ' '));
assertEquals("ab", StringUtils.center("ab", -1, ' '));
assertEquals("ab", StringUtils.center("ab", 1, ' '));
assertEquals(" ", StringUtils.center("", 4, ' '));
assertEquals(" ab ", StringUtils.center("ab", 4, ' '));
assertEquals("abcd", StringUtils.center("abcd", 2, ' '));
assertEquals(" a ", StringUtils.center("a", 4, ' '));
assertEquals(" a ", StringUtils.center("a", 5, ' '));
assertEquals("xxaxx", StringUtils.center("a", 5, 'x'));
}
@Test
void testCenter_StringIntString() {
assertNull(StringUtils.center(null, 4, null));
assertNull(StringUtils.center(null, -1, " "));
assertNull(StringUtils.center(null, 4, " "));
assertEquals(" ", StringUtils.center("", 4, " "));
assertEquals("ab", StringUtils.center("ab", 0, " "));
assertEquals("ab", StringUtils.center("ab", -1, " "));
assertEquals("ab", StringUtils.center("ab", 1, " "));
assertEquals(" ", StringUtils.center("", 4, " "));
assertEquals(" ab ", StringUtils.center("ab", 4, " "));
assertEquals("abcd", StringUtils.center("abcd", 2, " "));
assertEquals(" a ", StringUtils.center("a", 4, " "));
assertEquals("yayz", StringUtils.center("a", 4, "yz"));
assertEquals("yzyayzy", StringUtils.center("a", 7, "yz"));
assertEquals(" abc ", StringUtils.center("abc", 7, null));
assertEquals(" abc ", StringUtils.center("abc", 7, ""));
}
@Test
void testChomp() {
final String[][] chompCases = {
{FOO_UNCAP + "\r\n", FOO_UNCAP},
{FOO_UNCAP + "\n", FOO_UNCAP},
{FOO_UNCAP + "\r", FOO_UNCAP},
{FOO_UNCAP + " \r", FOO_UNCAP + " "},
{FOO_UNCAP, FOO_UNCAP},
{FOO_UNCAP + "\n\n", FOO_UNCAP + "\n"},
{FOO_UNCAP + "\r\n\r\n", FOO_UNCAP + "\r\n"},
{"foo\nfoo", "foo\nfoo"},
{"foo\n\rfoo", "foo\n\rfoo"},
{"\n", ""},
{"\r", ""},
{"a", "a"},
{"\r\n", ""},
{"", ""},
{null, null},
{FOO_UNCAP + "\n\r", FOO_UNCAP + "\n"}
};
for (final String[] chompCase : chompCases) {
final String original = chompCase[0];
final String expectedResult = chompCase[1];
assertEquals(expectedResult, StringUtils.chomp(original), "chomp(String) failed");
}
assertEquals("foo", StringUtils.chomp("foobar", "bar"), "chomp(String, String) failed");
assertEquals("foobar", StringUtils.chomp("foobar", "baz"), "chomp(String, String) failed");
assertEquals("foo", StringUtils.chomp("foo", "foooo"), "chomp(String, String) failed");
assertEquals("foobar", StringUtils.chomp("foobar", ""), "chomp(String, String) failed");
assertEquals("foobar", StringUtils.chomp("foobar", null), "chomp(String, String) failed");
assertEquals("", StringUtils.chomp("", "foo"), "chomp(String, String) failed");
assertEquals("", StringUtils.chomp("", null), "chomp(String, String) failed");
assertEquals("", StringUtils.chomp("", ""), "chomp(String, String) failed");
assertNull(StringUtils.chomp(null, "foo"), "chomp(String, String) failed");
assertNull(StringUtils.chomp(null, null), "chomp(String, String) failed");
assertNull(StringUtils.chomp(null, ""), "chomp(String, String) failed");
assertEquals("", StringUtils.chomp("foo", "foo"), "chomp(String, String) failed");
assertEquals(" ", StringUtils.chomp(" foo", "foo"), "chomp(String, String) failed");
assertEquals("foo ", StringUtils.chomp("foo ", "foo"), "chomp(String, String) failed");
}
@Test
void testChop() {
final String[][] chopCases = {
{FOO_UNCAP + "\r\n", FOO_UNCAP},
{FOO_UNCAP + "\n", FOO_UNCAP},
{FOO_UNCAP + "\r", FOO_UNCAP},
{FOO_UNCAP + " \r", FOO_UNCAP + " "},
{"foo", "fo"},
{"foo\nfoo", "foo\nfo"},
{"\n", ""},
{"\r", ""},
{"\r\n", ""},
{null, null},
{"", ""},
{"a", ""},
};
for (final String[] chopCase : chopCases) {
final String original = chopCase[0];
final String expectedResult = chopCase[1];
assertEquals(expectedResult, StringUtils.chop(original), "chop(String) failed");
}
}
@Test
void testConstructor() {
assertNotNull(new StringUtils());
final Constructor<?>[] cons = StringUtils.class.getDeclaredConstructors();
assertEquals(1, cons.length);
assertTrue(Modifier.isPublic(cons[0].getModifiers()));
assertTrue(Modifier.isPublic(StringUtils.class.getModifiers()));
assertFalse(Modifier.isFinal(StringUtils.class.getModifiers()));
}
@Test
void testDefault_String() {
assertEquals("", StringUtils.defaultString(null));
assertEquals("", StringUtils.defaultString(""));
assertEquals("abc", StringUtils.defaultString("abc"));
}
@Test
void testDefault_StringString() {
assertEquals("NULL", StringUtils.defaultString(null, "NULL"));
assertEquals("", StringUtils.defaultString("", "NULL"));
assertEquals("abc", StringUtils.defaultString("abc", "NULL"));
}
@Test
void testDefaultIfBlank_CharBuffers() {
assertEquals("NULL", StringUtils.defaultIfBlank(CharBuffer.wrap(""), CharBuffer.wrap("NULL")).toString());
assertEquals("NULL", StringUtils.defaultIfBlank(CharBuffer.wrap(" "), CharBuffer.wrap("NULL")).toString());
assertEquals("abc", StringUtils.defaultIfBlank(CharBuffer.wrap("abc"), CharBuffer.wrap("NULL")).toString());
assertNull(StringUtils.defaultIfBlank(CharBuffer.wrap(""), (CharBuffer) null));
// Tests compatibility for the API return type
final CharBuffer s = StringUtils.defaultIfBlank(CharBuffer.wrap("abc"), CharBuffer.wrap("NULL"));
assertEquals("abc", s.toString());
}
@Test
void testDefaultIfBlank_StringBuffers() {
assertEquals("NULL", StringUtils.defaultIfBlank(new StringBuffer(""), new StringBuffer("NULL")).toString());
assertEquals("NULL", StringUtils.defaultIfBlank(new StringBuffer(" "), new StringBuffer("NULL")).toString());
assertEquals("abc", StringUtils.defaultIfBlank(new StringBuffer("abc"), new StringBuffer("NULL")).toString());
assertNull(StringUtils.defaultIfBlank(new StringBuffer(""), (StringBuffer) null));
// Tests compatibility for the API return type
final StringBuffer s = StringUtils.defaultIfBlank(new StringBuffer("abc"), new StringBuffer("NULL"));
assertEquals("abc", s.toString());
}
@Test
void testDefaultIfBlank_StringBuilders() {
assertEquals("NULL", StringUtils.defaultIfBlank(new StringBuilder(""), new StringBuilder("NULL")).toString());
assertEquals("NULL", StringUtils.defaultIfBlank(new StringBuilder(" "), new StringBuilder("NULL")).toString());
assertEquals("abc", StringUtils.defaultIfBlank(new StringBuilder("abc"), new StringBuilder("NULL")).toString());
assertNull(StringUtils.defaultIfBlank(new StringBuilder(""), (StringBuilder) null));
// Tests compatibility for the API return type
final StringBuilder s = StringUtils.defaultIfBlank(new StringBuilder("abc"), new StringBuilder("NULL"));
assertEquals("abc", s.toString());
}
@Test
void testDefaultIfBlank_StringString() {
assertEquals("NULL", StringUtils.defaultIfBlank(null, "NULL"));
assertEquals("NULL", StringUtils.defaultIfBlank("", "NULL"));
assertEquals("NULL", StringUtils.defaultIfBlank(" ", "NULL"));
assertEquals("abc", StringUtils.defaultIfBlank("abc", "NULL"));
assertNull(StringUtils.defaultIfBlank("", (String) null));
// Tests compatibility for the API return type
final String s = StringUtils.defaultIfBlank("abc", "NULL");
assertEquals("abc", s);
}
@Test
void testDefaultIfEmpty_CharBuffers() {
assertEquals("NULL", StringUtils.defaultIfEmpty(CharBuffer.wrap(""), CharBuffer.wrap("NULL")).toString());
assertEquals("abc", StringUtils.defaultIfEmpty(CharBuffer.wrap("abc"), CharBuffer.wrap("NULL")).toString());
assertNull(StringUtils.defaultIfEmpty(CharBuffer.wrap(""), (CharBuffer) null));
// Tests compatibility for the API return type
final CharBuffer s = StringUtils.defaultIfEmpty(CharBuffer.wrap("abc"), CharBuffer.wrap("NULL"));
assertEquals("abc", s.toString());
}
@Test
void testDefaultIfEmpty_StringBuffers() {
assertEquals("NULL", StringUtils.defaultIfEmpty(new StringBuffer(""), new StringBuffer("NULL")).toString());
assertEquals("abc", StringUtils.defaultIfEmpty(new StringBuffer("abc"), new StringBuffer("NULL")).toString());
assertNull(StringUtils.defaultIfEmpty(new StringBuffer(""), (StringBuffer) null));
// Tests compatibility for the API return type
final StringBuffer s = StringUtils.defaultIfEmpty(new StringBuffer("abc"), new StringBuffer("NULL"));
assertEquals("abc", s.toString());
}
@Test
void testDefaultIfEmpty_StringBuilders() {
assertEquals("NULL", StringUtils.defaultIfEmpty(new StringBuilder(""), new StringBuilder("NULL")).toString());
assertEquals("abc", StringUtils.defaultIfEmpty(new StringBuilder("abc"), new StringBuilder("NULL")).toString());
assertNull(StringUtils.defaultIfEmpty(new StringBuilder(""), (StringBuilder) null));
// Tests compatibility for the API return type
final StringBuilder s = StringUtils.defaultIfEmpty(new StringBuilder("abc"), new StringBuilder("NULL"));
assertEquals("abc", s.toString());
}
@Test
void testDefaultIfEmpty_StringString() {
assertEquals("NULL", StringUtils.defaultIfEmpty(null, "NULL"));
assertEquals("NULL", StringUtils.defaultIfEmpty("", "NULL"));
assertEquals("abc", StringUtils.defaultIfEmpty("abc", "NULL"));
assertNull(StringUtils.getIfEmpty("", null));
// Tests compatibility for the API return type
final String s = StringUtils.defaultIfEmpty("abc", "NULL");
assertEquals("abc", s);
}
@Test
void testDeleteWhitespace_String() {
assertNull(StringUtils.deleteWhitespace(null));
assertEquals("", StringUtils.deleteWhitespace(""));
assertEquals("", StringUtils.deleteWhitespace(" \u000C \t\t\u001F\n\n \u000B "));
assertEquals("", StringUtils.deleteWhitespace(StringUtilsTest.WHITESPACE));
assertEquals(StringUtilsTest.NON_WHITESPACE, StringUtils.deleteWhitespace(StringUtilsTest.NON_WHITESPACE));
// Note: u-2007 and u-000A both cause problems in the source code
// it should ignore 2007 but delete 000A
assertEquals("\u00A0\u202F", StringUtils.deleteWhitespace(" \u00A0 \t\t\n\n \u202F "));
assertEquals("\u00A0\u202F", StringUtils.deleteWhitespace("\u00A0\u202F"));
assertEquals("test", StringUtils.deleteWhitespace("\u000Bt \t\n\u0009e\rs\n\n \tt"));
}
@Test
void testDifference_StringString() {
assertNull(StringUtils.difference(null, null));
assertEquals("", StringUtils.difference("", ""));
assertEquals("abc", StringUtils.difference("", "abc"));
assertEquals("", StringUtils.difference("abc", ""));
assertEquals("i am a robot", StringUtils.difference(null, "i am a robot"));
assertEquals("i am a machine", StringUtils.difference("i am a machine", null));
assertEquals("robot", StringUtils.difference("i am a machine", "i am a robot"));
assertEquals("", StringUtils.difference("abc", "abc"));
assertEquals("you are a robot", StringUtils.difference("i am a robot", "you are a robot"));
}
@Test
void testDifferenceAt_StringArray() {
assertEquals(-1, StringUtils.indexOfDifference((String[]) null));
assertEquals(-1, StringUtils.indexOfDifference());
assertEquals(-1, StringUtils.indexOfDifference("abc"));
assertEquals(-1, StringUtils.indexOfDifference(null, null));
assertEquals(-1, StringUtils.indexOfDifference("", ""));
assertEquals(0, StringUtils.indexOfDifference("", null));
assertEquals(0, StringUtils.indexOfDifference("abc", null, null));
assertEquals(0, StringUtils.indexOfDifference(null, null, "abc"));
assertEquals(0, StringUtils.indexOfDifference("", "abc"));
assertEquals(0, StringUtils.indexOfDifference("abc", ""));
assertEquals(-1, StringUtils.indexOfDifference("abc", "abc"));
assertEquals(1, StringUtils.indexOfDifference("abc", "a"));
assertEquals(2, StringUtils.indexOfDifference("ab", "abxyz"));
assertEquals(2, StringUtils.indexOfDifference("abcde", "abxyz"));
assertEquals(0, StringUtils.indexOfDifference("abcde", "xyz"));
assertEquals(0, StringUtils.indexOfDifference("xyz", "abcde"));
assertEquals(7, StringUtils.indexOfDifference("i am a machine", "i am a robot"));
}
@Test
void testDifferenceAt_StringString() {
assertEquals(-1, StringUtils.indexOfDifference(null, null));
assertEquals(0, StringUtils.indexOfDifference(null, "i am a robot"));
assertEquals(-1, StringUtils.indexOfDifference("", ""));
assertEquals(0, StringUtils.indexOfDifference("", "abc"));
assertEquals(0, StringUtils.indexOfDifference("abc", ""));
assertEquals(0, StringUtils.indexOfDifference("i am a machine", null));
assertEquals(7, StringUtils.indexOfDifference("i am a machine", "i am a robot"));
assertEquals(-1, StringUtils.indexOfDifference("foo", "foo"));
assertEquals(0, StringUtils.indexOfDifference("i am a robot", "you are a robot"));
}
/**
* A sanity check for {@link StringUtils#EMPTY}.
*/
@Test
void testEMPTY() {
assertNotNull(StringUtils.EMPTY);
assertEquals("", StringUtils.EMPTY);
assertEquals(0, StringUtils.EMPTY.length());
}
@Test
void testEscapeSurrogatePairs() {
assertEquals("\uD83D\uDE30", StringEscapeUtils.escapeCsv("\uD83D\uDE30"));
// Examples from https://en.wikipedia.org/wiki/UTF-16
assertEquals("\uD800\uDC00", StringEscapeUtils.escapeCsv("\uD800\uDC00"));
assertEquals("\uD834\uDD1E", StringEscapeUtils.escapeCsv("\uD834\uDD1E"));
assertEquals("\uDBFF\uDFFD", StringEscapeUtils.escapeCsv("\uDBFF\uDFFD"));
assertEquals("\uDBFF\uDFFD", StringEscapeUtils.escapeHtml3("\uDBFF\uDFFD"));
assertEquals("\uDBFF\uDFFD", StringEscapeUtils.escapeHtml4("\uDBFF\uDFFD"));
assertEquals("\uDBFF\uDFFD", StringEscapeUtils.escapeXml("\uDBFF\uDFFD"));
}
/**
* Tests LANG-858.
*/
@Test
void testEscapeSurrogatePairsLang858() {
assertEquals("\\uDBFF\\uDFFD", StringEscapeUtils.escapeJava("\uDBFF\uDFFD")); //fail LANG-858
assertEquals("\\uDBFF\\uDFFD", StringEscapeUtils.escapeEcmaScript("\uDBFF\uDFFD")); //fail LANG-858
}
@Test
void testGeorgianSample() {
final char[] arrayI = {
//Latin Small Letter dotless I
(char) 0x0131,
//Greek Capital Letter Theta
(char) 0x03F4
};
final char[] arrayJ = {
//Latin Capital Letter I with dot above
(char) 0x0130,
//Greek Theta Symbol
(char) 0x03D1
};
for (final char i : arrayI) {
for (final char j : arrayJ) {
final String si = String.valueOf(i);
final String sj = String.valueOf(j);
final boolean res1 = si.equalsIgnoreCase(sj);
final CharSequence ci = new StringBuilder(si);
final CharSequence cj = new StringBuilder(sj);
boolean res2 = StringUtils.startsWithIgnoreCase(ci, cj);
assertEquals(res1, res2, "si : " + si + " sj : " + sj);
res2 = StringUtils.endsWithIgnoreCase(ci, cj);
assertEquals(res1, res2, "si : " + si + " sj : " + sj);
res2 = StringUtils.compareIgnoreCase(ci.toString(), cj.toString()) == 0;
assertEquals(res1, res2, "si : " + si + " sj : " + sj);
res2 = StringUtils.indexOfIgnoreCase(ci.toString(), cj.toString()) == 0;
assertEquals(res1, res2, "si : " + si + " sj : " + sj);
res2 = StringUtils.lastIndexOfIgnoreCase(ci.toString(), cj.toString()) == 0;
assertEquals(res1, res2, "si : " + si + " sj : " + sj);
}
}
}
@Test
void testGetBytes_Charset() {
assertEquals(ArrayUtils.EMPTY_BYTE_ARRAY, StringUtils.getBytes(null, (Charset) null));
assertArrayEquals(StringUtils.EMPTY.getBytes(), StringUtils.getBytes(StringUtils.EMPTY, (Charset) null));
assertArrayEquals(StringUtils.EMPTY.getBytes(StandardCharsets.US_ASCII),
StringUtils.getBytes(StringUtils.EMPTY, StandardCharsets.US_ASCII));
}
@Test
void testGetBytes_String() throws UnsupportedEncodingException {
assertEquals(ArrayUtils.EMPTY_BYTE_ARRAY, StringUtils.getBytes(null, (String) null));
assertArrayEquals(StringUtils.EMPTY.getBytes(), StringUtils.getBytes(StringUtils.EMPTY, (String) null));
assertArrayEquals(StringUtils.EMPTY.getBytes(StandardCharsets.US_ASCII.name()),
StringUtils.getBytes(StringUtils.EMPTY, StandardCharsets.US_ASCII.name()));
}
@Test
void testGetCommonPrefix_StringArray() {
assertEquals("", StringUtils.getCommonPrefix((String[]) null));
assertEquals("", StringUtils.getCommonPrefix());
assertEquals("abc", StringUtils.getCommonPrefix("abc"));
assertEquals("", StringUtils.getCommonPrefix(null, null));
assertEquals("", StringUtils.getCommonPrefix("", ""));
assertEquals("", StringUtils.getCommonPrefix("", null));
assertEquals("", StringUtils.getCommonPrefix("abc", null, null));
assertEquals("", StringUtils.getCommonPrefix(null, null, "abc"));
assertEquals("", StringUtils.getCommonPrefix("", "abc"));
assertEquals("", StringUtils.getCommonPrefix("abc", ""));
assertEquals("abc", StringUtils.getCommonPrefix("abc", "abc"));
assertEquals("a", StringUtils.getCommonPrefix("abc", "a"));
assertEquals("ab", StringUtils.getCommonPrefix("ab", "abxyz"));
assertEquals("ab", StringUtils.getCommonPrefix("abcde", "abxyz"));
assertEquals("", StringUtils.getCommonPrefix("abcde", "xyz"));
assertEquals("", StringUtils.getCommonPrefix("xyz", "abcde"));
assertEquals("i am a ", StringUtils.getCommonPrefix("i am a machine", "i am a robot"));
}
@Test
void testGetDigits() {
assertNull(StringUtils.getDigits(null));
assertEquals("", StringUtils.getDigits(""));
assertEquals("", StringUtils.getDigits("abc"));
assertEquals("1000", StringUtils.getDigits("1000$"));
assertEquals("12345", StringUtils.getDigits("123password45"));
assertEquals("5417543010", StringUtils.getDigits("(541) 754-3010"));
assertEquals("\u0967\u0968\u0969", StringUtils.getDigits("\u0967\u0968\u0969"));
}
@Test
void testGetFuzzyDistance() {
assertEquals(0, StringUtils.getFuzzyDistance("", "", Locale.ENGLISH));
assertEquals(0, StringUtils.getFuzzyDistance("Workshop", "b", Locale.ENGLISH));
assertEquals(1, StringUtils.getFuzzyDistance("Room", "o", Locale.ENGLISH));
assertEquals(1, StringUtils.getFuzzyDistance("Workshop", "w", Locale.ENGLISH));
assertEquals(2, StringUtils.getFuzzyDistance("Workshop", "ws", Locale.ENGLISH));
assertEquals(4, StringUtils.getFuzzyDistance("Workshop", "wo", Locale.ENGLISH));
assertEquals(3, StringUtils.getFuzzyDistance("Apache Software Foundation", "asf", Locale.ENGLISH));
}
@Test
void testGetFuzzyDistance_NullNullNull() {
assertIllegalArgumentException(() -> StringUtils.getFuzzyDistance(null, null, null));
}
@Test
void testGetFuzzyDistance_NullStringLocale() {
assertIllegalArgumentException(() -> StringUtils.getFuzzyDistance(null, "clear", Locale.ENGLISH));
}
@Test
void testGetFuzzyDistance_StringNullLoclae() {
assertIllegalArgumentException(() -> StringUtils.getFuzzyDistance(" ", null, Locale.ENGLISH));
}
@Test
void testGetFuzzyDistance_StringStringNull() {
assertIllegalArgumentException(() -> StringUtils.getFuzzyDistance(" ", "clear", null));
}
@Test
void testGetIfBlank_StringStringSupplier() {
assertEquals("NULL", StringUtils.getIfBlank(null, () -> "NULL"));
assertEquals("NULL", StringUtils.getIfBlank("", () -> "NULL"));
assertEquals("NULL", StringUtils.getIfBlank(" ", () -> "NULL"));
assertEquals("abc", StringUtils.getIfBlank("abc", () -> "NULL"));
assertNull(StringUtils.getIfBlank("", Suppliers.nul()));
assertNull(StringUtils.defaultIfBlank("", (String) null));
// Tests compatibility for the API return type
final String s = StringUtils.getIfBlank("abc", () -> "NULL");
assertEquals("abc", s);
//Checking that default value supplied only on demand
final MutableInt numberOfCalls = new MutableInt(0);
final Supplier<String> countingDefaultSupplier = () -> {
numberOfCalls.increment();
return "NULL";
};
StringUtils.getIfBlank("abc", countingDefaultSupplier);
assertEquals(0, numberOfCalls.get());
StringUtils.getIfBlank("", countingDefaultSupplier);
assertEquals(1, numberOfCalls.get());
StringUtils.getIfBlank(" ", countingDefaultSupplier);
assertEquals(2, numberOfCalls.get());
StringUtils.getIfBlank(null, countingDefaultSupplier);
assertEquals(3, numberOfCalls.get());
}
@Test
void testGetIfEmpty_StringStringSupplier() {
assertEquals("NULL", StringUtils.getIfEmpty((String) null, () -> "NULL"));
assertEquals("NULL", StringUtils.getIfEmpty("", () -> "NULL"));
assertEquals("abc", StringUtils.getIfEmpty("abc", () -> "NULL"));
assertNull(StringUtils.getIfEmpty("", Suppliers.nul()));
assertNull(StringUtils.defaultIfEmpty("", (String) null));
// Tests compatibility for the API return type
final String s = StringUtils.getIfEmpty("abc", () -> "NULL");
assertEquals("abc", s);
//Checking that default value supplied only on demand
final MutableInt numberOfCalls = new MutableInt(0);
final Supplier<String> countingDefaultSupplier = () -> {
numberOfCalls.increment();
return "NULL";
};
StringUtils.getIfEmpty("abc", countingDefaultSupplier);
assertEquals(0, numberOfCalls.get());
StringUtils.getIfEmpty("", countingDefaultSupplier);
assertEquals(1, numberOfCalls.get());
StringUtils.getIfEmpty(null, countingDefaultSupplier);
assertEquals(2, numberOfCalls.get());
}
@Test
void testGetJaroWinklerDistance_NullNull() {
assertIllegalArgumentException(() -> StringUtils.getJaroWinklerDistance(null, null));
}
@Test
void testGetJaroWinklerDistance_NullString() {
assertIllegalArgumentException(() -> StringUtils.getJaroWinklerDistance(null, "clear"));
}
@Test
void testGetJaroWinklerDistance_StringNull() {
assertIllegalArgumentException(() -> StringUtils.getJaroWinklerDistance(" ", null));
}
@Test
void testGetJaroWinklerDistance_StringString() {
assertEquals(0.93d, StringUtils.getJaroWinklerDistance("frog", "fog"));
assertEquals(0.0d, StringUtils.getJaroWinklerDistance("fly", "ant"));
assertEquals(0.44d, StringUtils.getJaroWinklerDistance("elephant", "hippo"));
assertEquals(0.84d, StringUtils.getJaroWinklerDistance("dwayne", "duane"));
assertEquals(0.93d, StringUtils.getJaroWinklerDistance("ABC Corporation", "ABC Corp"));
assertEquals(0.95d, StringUtils.getJaroWinklerDistance("D N H Enterprises Inc", "D & H Enterprises, Inc."));
assertEquals(0.92d, StringUtils.getJaroWinklerDistance("My Gym Children's Fitness Center", "My Gym. Childrens Fitness"));
assertEquals(0.88d, StringUtils.getJaroWinklerDistance("PENNSYLVANIA", "PENNCISYLVNIA"));
assertEquals(0.63d, StringUtils.getJaroWinklerDistance("Haus Ingeborg", "Ingeborg Esser"));
}
@Test
void testGetLevenshteinDistance_NullString() {
assertIllegalArgumentException(() -> StringUtils.getLevenshteinDistance("a", null));
}
@Test
void testGetLevenshteinDistance_NullStringInt() {
assertIllegalArgumentException(() -> StringUtils.getLevenshteinDistance(null, "a", 0));
}
@Test
void testGetLevenshteinDistance_StringNull() {
assertIllegalArgumentException(() -> StringUtils.getLevenshteinDistance(null, "a"));
}
@Test
void testGetLevenshteinDistance_StringNullInt() {
assertIllegalArgumentException(() -> StringUtils.getLevenshteinDistance("a", null, 0));
}
@Test
void testGetLevenshteinDistance_StringString() {
assertEquals(0, StringUtils.getLevenshteinDistance("", ""));
assertEquals(1, StringUtils.getLevenshteinDistance("", "a"));
assertEquals(7, StringUtils.getLevenshteinDistance("aaapppp", ""));
assertEquals(1, StringUtils.getLevenshteinDistance("frog", "fog"));
assertEquals(3, StringUtils.getLevenshteinDistance("fly", "ant"));
assertEquals(7, StringUtils.getLevenshteinDistance("elephant", "hippo"));
assertEquals(7, StringUtils.getLevenshteinDistance("hippo", "elephant"));
assertEquals(8, StringUtils.getLevenshteinDistance("hippo", "zzzzzzzz"));
assertEquals(8, StringUtils.getLevenshteinDistance("zzzzzzzz", "hippo"));
assertEquals(1, StringUtils.getLevenshteinDistance("hello", "hallo"));
}
@Test
void testGetLevenshteinDistance_StringStringInt() {
// empty strings
assertEquals(0, StringUtils.getLevenshteinDistance("", "", 0));
assertEquals(7, StringUtils.getLevenshteinDistance("aaapppp", "", 8));
assertEquals(7, StringUtils.getLevenshteinDistance("aaapppp", "", 7));
assertEquals(-1, StringUtils.getLevenshteinDistance("aaapppp", "", 6));
// unequal strings, zero threshold
assertEquals(-1, StringUtils.getLevenshteinDistance("b", "a", 0));
assertEquals(-1, StringUtils.getLevenshteinDistance("a", "b", 0));
// equal strings
assertEquals(0, StringUtils.getLevenshteinDistance("aa", "aa", 0));
assertEquals(0, StringUtils.getLevenshteinDistance("aa", "aa", 2));
// same length
assertEquals(-1, StringUtils.getLevenshteinDistance("aaa", "bbb", 2));
assertEquals(3, StringUtils.getLevenshteinDistance("aaa", "bbb", 3));
// big stripe
assertEquals(6, StringUtils.getLevenshteinDistance("aaaaaa", "b", 10));
// distance less than threshold
assertEquals(7, StringUtils.getLevenshteinDistance("aaapppp", "b", 8));
assertEquals(3, StringUtils.getLevenshteinDistance("a", "bbb", 4));
// distance equal to threshold
assertEquals(7, StringUtils.getLevenshteinDistance("aaapppp", "b", 7));
assertEquals(3, StringUtils.getLevenshteinDistance("a", "bbb", 3));
// distance greater than threshold
assertEquals(-1, StringUtils.getLevenshteinDistance("a", "bbb", 2));
assertEquals(-1, StringUtils.getLevenshteinDistance("bbb", "a", 2));
assertEquals(-1, StringUtils.getLevenshteinDistance("aaapppp", "b", 6));
// stripe runs off array, strings not similar
assertEquals(-1, StringUtils.getLevenshteinDistance("a", "bbb", 1));
assertEquals(-1, StringUtils.getLevenshteinDistance("bbb", "a", 1));
// stripe runs off array, strings are similar
assertEquals(-1, StringUtils.getLevenshteinDistance("12345", "1234567", 1));
assertEquals(-1, StringUtils.getLevenshteinDistance("1234567", "12345", 1));
// old getLevenshteinDistance test cases
assertEquals(1, StringUtils.getLevenshteinDistance("frog", "fog", 1));
assertEquals(3, StringUtils.getLevenshteinDistance("fly", "ant", 3));
assertEquals(7, StringUtils.getLevenshteinDistance("elephant", "hippo", 7));
assertEquals(-1, StringUtils.getLevenshteinDistance("elephant", "hippo", 6));
assertEquals(7, StringUtils.getLevenshteinDistance("hippo", "elephant", 7));
assertEquals(-1, StringUtils.getLevenshteinDistance("hippo", "elephant", 6));
assertEquals(8, StringUtils.getLevenshteinDistance("hippo", "zzzzzzzz", 8));
assertEquals(8, StringUtils.getLevenshteinDistance("zzzzzzzz", "hippo", 8));
assertEquals(1, StringUtils.getLevenshteinDistance("hello", "hallo", 1));
assertEquals(1, StringUtils.getLevenshteinDistance("frog", "fog", Integer.MAX_VALUE));
assertEquals(3, StringUtils.getLevenshteinDistance("fly", "ant", Integer.MAX_VALUE));
assertEquals(7, StringUtils.getLevenshteinDistance("elephant", "hippo", Integer.MAX_VALUE));
assertEquals(7, StringUtils.getLevenshteinDistance("hippo", "elephant", Integer.MAX_VALUE));
assertEquals(8, StringUtils.getLevenshteinDistance("hippo", "zzzzzzzz", Integer.MAX_VALUE));
assertEquals(8, StringUtils.getLevenshteinDistance("zzzzzzzz", "hippo", Integer.MAX_VALUE));
assertEquals(1, StringUtils.getLevenshteinDistance("hello", "hallo", Integer.MAX_VALUE));
}
@Test
void testGetLevenshteinDistance_StringStringNegativeInt() {
assertIllegalArgumentException(() -> StringUtils.getLevenshteinDistance("a", "a", -1));
}
/**
* Test for {@link StringUtils#isAllLowerCase(CharSequence)}.
*/
@Test
void testIsAllLowerCase() {
assertFalse(StringUtils.isAllLowerCase(null));
assertFalse(StringUtils.isAllLowerCase(StringUtils.EMPTY));
assertFalse(StringUtils.isAllLowerCase(" "));
assertTrue(StringUtils.isAllLowerCase("abc"));
assertFalse(StringUtils.isAllLowerCase("abc "));
assertFalse(StringUtils.isAllLowerCase("abc\n"));
assertFalse(StringUtils.isAllLowerCase("abC"));
assertFalse(StringUtils.isAllLowerCase("ab c"));
assertFalse(StringUtils.isAllLowerCase("ab1c"));
assertFalse(StringUtils.isAllLowerCase("ab/c"));
}
/**
* Test for {@link StringUtils#isAllUpperCase(CharSequence)}.
*/
@Test
void testIsAllUpperCase() {
assertFalse(StringUtils.isAllUpperCase(null));
assertFalse(StringUtils.isAllUpperCase(StringUtils.EMPTY));
assertFalse(StringUtils.isAllUpperCase(" "));
assertTrue(StringUtils.isAllUpperCase("ABC"));
assertFalse(StringUtils.isAllUpperCase("ABC "));
assertFalse(StringUtils.isAllUpperCase("ABC\n"));
assertFalse(StringUtils.isAllUpperCase("aBC"));
assertFalse(StringUtils.isAllUpperCase("A C"));
assertFalse(StringUtils.isAllUpperCase("A1C"));
assertFalse(StringUtils.isAllUpperCase("A/C"));
}
/**
* Test for {@link StringUtils#isMixedCase(CharSequence)}.
*/
@Test
void testIsMixedCase() {
assertFalse(StringUtils.isMixedCase(null));
assertFalse(StringUtils.isMixedCase(StringUtils.EMPTY));
assertFalse(StringUtils.isMixedCase(" "));
assertFalse(StringUtils.isMixedCase("A"));
assertFalse(StringUtils.isMixedCase("a"));
assertFalse(StringUtils.isMixedCase("/"));
assertFalse(StringUtils.isMixedCase("A/"));
assertFalse(StringUtils.isMixedCase("/b"));
assertFalse(StringUtils.isMixedCase("abc"));
assertFalse(StringUtils.isMixedCase("ABC"));
assertTrue(StringUtils.isMixedCase("aBc"));
assertTrue(StringUtils.isMixedCase("aBc "));
assertTrue(StringUtils.isMixedCase("A c"));
assertTrue(StringUtils.isMixedCase("aBc\n"));
assertTrue(StringUtils.isMixedCase("A1c"));
assertTrue(StringUtils.isMixedCase("a/C"));
}
@Test
void testJoin_ArrayCharSeparator() {
assertNull(StringUtils.join((Object[]) null, ','));
assertEquals(TEXT_LIST_CHAR, StringUtils.join(ARRAY_LIST, SEPARATOR_CHAR));
assertEquals("", StringUtils.join(EMPTY_ARRAY_LIST, SEPARATOR_CHAR));
assertEquals(";;foo", StringUtils.join(MIXED_ARRAY_LIST, SEPARATOR_CHAR));
assertEquals("foo;2", StringUtils.join(MIXED_TYPE_LIST, SEPARATOR_CHAR));
assertNull(StringUtils.join((Object[]) null, ',', 0, 1));
assertEquals("/", StringUtils.join(MIXED_ARRAY_LIST, '/', 0, MIXED_ARRAY_LIST.length - 1));
assertEquals("foo", StringUtils.join(MIXED_TYPE_LIST, '/', 0, 1));
assertEquals("null", StringUtils.join(NULL_TO_STRING_LIST, '/', 0, 1));
assertEquals("foo/2", StringUtils.join(MIXED_TYPE_LIST, '/', 0, 2));
assertEquals("2", StringUtils.join(MIXED_TYPE_LIST, '/', 1, 2));
assertEquals("", StringUtils.join(MIXED_TYPE_LIST, '/', 2, 1));
}
@Test
void testJoin_ArrayOfBooleans() {
assertNull(StringUtils.join((boolean[]) null, COMMA_SEPARATOR_CHAR));
assertEquals("false;false", StringUtils.join(ARRAY_FALSE_FALSE, SEPARATOR_CHAR));
assertEquals("", StringUtils.join(EMPTY, SEPARATOR_CHAR));
assertEquals("false,true,false", StringUtils.join(ARRAY_FALSE_TRUE_FALSE, COMMA_SEPARATOR_CHAR));
assertEquals("true", StringUtils.join(ARRAY_FALSE_TRUE, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((boolean[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(ARRAY_FALSE_FALSE, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(ARRAY_FALSE_TRUE_FALSE, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayOfBytes() {
assertNull(StringUtils.join((byte[]) null, ','));
assertEquals("1;2", StringUtils.join(BYTE_PRIM_LIST, SEPARATOR_CHAR));
assertEquals("2", StringUtils.join(BYTE_PRIM_LIST, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((byte[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(BYTE_PRIM_LIST, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(BYTE_PRIM_LIST, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayOfChars() {
assertNull(StringUtils.join((char[]) null, ','));
assertEquals("1;2", StringUtils.join(CHAR_PRIM_LIST, SEPARATOR_CHAR));
assertEquals("2", StringUtils.join(CHAR_PRIM_LIST, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((char[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(CHAR_PRIM_LIST, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(CHAR_PRIM_LIST, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayOfDoubles() {
assertNull(StringUtils.join((double[]) null, ','));
assertEquals("1.0;2.0", StringUtils.join(DOUBLE_PRIM_LIST, SEPARATOR_CHAR));
assertEquals("2.0", StringUtils.join(DOUBLE_PRIM_LIST, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((double[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(DOUBLE_PRIM_LIST, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(DOUBLE_PRIM_LIST, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayOfFloats() {
assertNull(StringUtils.join((float[]) null, ','));
assertEquals("1.0;2.0", StringUtils.join(FLOAT_PRIM_LIST, SEPARATOR_CHAR));
assertEquals("2.0", StringUtils.join(FLOAT_PRIM_LIST, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((float[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(FLOAT_PRIM_LIST, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(FLOAT_PRIM_LIST, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayOfInts() {
assertNull(StringUtils.join((int[]) null, ','));
assertEquals("1;2", StringUtils.join(INT_PRIM_LIST, SEPARATOR_CHAR));
assertEquals("2", StringUtils.join(INT_PRIM_LIST, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((int[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(INT_PRIM_LIST, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(INT_PRIM_LIST, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayOfLongs() {
assertNull(StringUtils.join((long[]) null, ','));
assertEquals("1;2", StringUtils.join(LONG_PRIM_LIST, SEPARATOR_CHAR));
assertEquals("2", StringUtils.join(LONG_PRIM_LIST, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((long[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(LONG_PRIM_LIST, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(LONG_PRIM_LIST, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayOfShorts() {
assertNull(StringUtils.join((short[]) null, ','));
assertEquals("1;2", StringUtils.join(SHORT_PRIM_LIST, SEPARATOR_CHAR));
assertEquals("2", StringUtils.join(SHORT_PRIM_LIST, SEPARATOR_CHAR, 1, 2));
assertNull(StringUtils.join((short[]) null, SEPARATOR_CHAR, 0, 1));
assertEquals(StringUtils.EMPTY, StringUtils.join(SHORT_PRIM_LIST, SEPARATOR_CHAR, 0, 0));
assertEquals(StringUtils.EMPTY, StringUtils.join(SHORT_PRIM_LIST, SEPARATOR_CHAR, 1, 0));
}
@Test
void testJoin_ArrayString_EmptyDelimiter() {
assertNull(StringUtils.join((Object[]) null, null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(ARRAY_LIST, null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(ARRAY_LIST, ""));
assertEquals("", StringUtils.join(NULL_ARRAY_LIST, null));
assertEquals("", StringUtils.join(EMPTY_ARRAY_LIST, null));
assertEquals("", StringUtils.join(EMPTY_ARRAY_LIST, ""));
assertEquals("", StringUtils.join(MIXED_ARRAY_LIST, "", 0, MIXED_ARRAY_LIST.length - 1));
}
@ParameterizedTest
@ValueSource(strings = {",", ";", Supplementary.CharU20000, Supplementary.CharU20001})
void testJoin_ArrayString_NonEmptyDelimiter(final String delimiter) {
assertEquals("", StringUtils.join(EMPTY_ARRAY_LIST, delimiter));
assertEquals(String.join(delimiter, ARRAY_LIST), StringUtils.join(ARRAY_LIST, delimiter));
assertEquals(delimiter + delimiter + "foo", StringUtils.join(MIXED_ARRAY_LIST, delimiter));
assertEquals(String.join(delimiter, "foo", "2"), StringUtils.join(MIXED_TYPE_LIST, delimiter));
assertEquals(delimiter, StringUtils.join(MIXED_ARRAY_LIST, delimiter, 0, MIXED_ARRAY_LIST.length - 1));
assertEquals("foo", StringUtils.join(MIXED_TYPE_LIST, delimiter, 0, 1));
assertEquals(String.join(delimiter, "foo", "2"), StringUtils.join(MIXED_TYPE_LIST, delimiter, 0, 2));
assertEquals("2", StringUtils.join(MIXED_TYPE_LIST, delimiter, 1, 2));
assertEquals("", StringUtils.join(MIXED_TYPE_LIST, delimiter, 2, 1));
}
@Test
void testJoin_IterableChar() {
assertNull(StringUtils.join((Iterable<?>) null, ','));
assertEquals(TEXT_LIST_CHAR, StringUtils.join(Arrays.asList(ARRAY_LIST), SEPARATOR_CHAR));
assertEquals("", StringUtils.join(Arrays.asList(NULL_ARRAY_LIST), SEPARATOR_CHAR));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST), SEPARATOR_CHAR));
assertEquals("foo", StringUtils.join(Collections.singleton("foo"), 'x'));
}
@Test
void testJoin_IterableString() {
assertNull(StringUtils.join((Iterable<?>) null, null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(Arrays.asList(ARRAY_LIST), null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(Arrays.asList(ARRAY_LIST), ""));
assertEquals("foo", StringUtils.join(Collections.singleton("foo"), "x"));
assertEquals("foo", StringUtils.join(Collections.singleton("foo"), null));
assertEquals("", StringUtils.join(Arrays.asList(NULL_ARRAY_LIST), null));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST), null));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST), ""));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST), SEPARATOR));
assertEquals(TEXT_LIST, StringUtils.join(Arrays.asList(ARRAY_LIST), SEPARATOR));
}
@Test
void testJoin_IteratorChar() {
assertNull(StringUtils.join((Iterator<?>) null, ','));
assertEquals(TEXT_LIST_CHAR, StringUtils.join(Arrays.asList(ARRAY_LIST).iterator(), SEPARATOR_CHAR));
assertEquals("", StringUtils.join(Arrays.asList(NULL_ARRAY_LIST).iterator(), SEPARATOR_CHAR));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST).iterator(), SEPARATOR_CHAR));
assertEquals("foo", StringUtils.join(Collections.singleton("foo").iterator(), 'x'));
assertEquals("null", StringUtils.join(Arrays.asList(NULL_TO_STRING_LIST).iterator(), SEPARATOR_CHAR));
}
@Test
void testJoin_IteratorString() {
assertNull(StringUtils.join((Iterator<?>) null, null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(Arrays.asList(ARRAY_LIST).iterator(), null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(Arrays.asList(ARRAY_LIST).iterator(), ""));
assertEquals("foo", StringUtils.join(Collections.singleton("foo").iterator(), "x"));
assertEquals("foo", StringUtils.join(Collections.singleton("foo").iterator(), null));
assertEquals("", StringUtils.join(Arrays.asList(NULL_ARRAY_LIST).iterator(), null));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST).iterator(), null));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST).iterator(), ""));
assertEquals("", StringUtils.join(Arrays.asList(EMPTY_ARRAY_LIST).iterator(), SEPARATOR));
assertEquals(TEXT_LIST, StringUtils.join(Arrays.asList(ARRAY_LIST).iterator(), SEPARATOR));
assertEquals("null", StringUtils.join(Arrays.asList(NULL_TO_STRING_LIST).iterator(), SEPARATOR));
}
@Test
void testJoin_List_CharDelimiter() {
assertEquals("/", StringUtils.join(MIXED_STRING_LIST, '/', 0, MIXED_STRING_LIST.size() - 1));
assertEquals("foo", StringUtils.join(MIXED_TYPE_OBJECT_LIST, '/', 0, 1));
assertEquals("foo/2", StringUtils.join(MIXED_TYPE_OBJECT_LIST, '/', 0, 2));
assertEquals("2", StringUtils.join(MIXED_TYPE_OBJECT_LIST, '/', 1, 2));
assertEquals("", StringUtils.join(MIXED_TYPE_OBJECT_LIST, '/', 2, 1));
assertNull(null, StringUtils.join((List<?>) null, '/', 0, 1));
}
@Test
void testJoin_List_EmptyDelimiter() {
assertNull(StringUtils.join((List<String>) null, null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(STRING_LIST, null));
assertEquals(TEXT_LIST_NOSEP, StringUtils.join(STRING_LIST, ""));
assertEquals("", StringUtils.join(NULL_STRING_LIST, null));
assertEquals("", StringUtils.join(EMPTY_STRING_LIST, null));
assertEquals("", StringUtils.join(EMPTY_STRING_LIST, ""));
assertEquals("", StringUtils.join(MIXED_STRING_LIST, "", 0, MIXED_STRING_LIST.size() - 1));
}
@ParameterizedTest
@ValueSource(strings = {",", ";", Supplementary.CharU20000, Supplementary.CharU20001})
void testJoin_List_NonEmptyDelimiter(final String delimiter) {
assertEquals("", StringUtils.join(EMPTY_STRING_LIST, delimiter));
assertEquals(String.join(delimiter, STRING_LIST), StringUtils.join(STRING_LIST, delimiter));
assertEquals(delimiter + delimiter + "foo", StringUtils.join(MIXED_STRING_LIST, delimiter));
assertEquals(String.join(delimiter, "foo", "2"), StringUtils.join(MIXED_TYPE_OBJECT_LIST, delimiter));
assertEquals(delimiter, StringUtils.join(MIXED_STRING_LIST, delimiter, 0, MIXED_STRING_LIST.size() - 1));
assertEquals("foo", StringUtils.join(MIXED_TYPE_OBJECT_LIST, delimiter, 0, 1));
assertEquals(String.join(delimiter, "foo", "2"), StringUtils.join(MIXED_TYPE_OBJECT_LIST, delimiter, 0, 2));
assertEquals("2", StringUtils.join(MIXED_TYPE_OBJECT_LIST, delimiter, 1, 2));
assertEquals("", StringUtils.join(MIXED_TYPE_OBJECT_LIST, delimiter, 2, 1));
assertNull(null, StringUtils.join((List<?>) null, delimiter, 0, 1));
}
@Test
void testJoin_Objectarray() {
// assertNull(StringUtils.join(null)); // generates warning
assertNull(StringUtils.join((Object[]) null)); // equivalent explicit cast
// test additional varargs calls
assertEquals("", StringUtils.join()); // empty array
assertEquals("", StringUtils.join((Object) null)); // => new Object[]{null}
assertEquals("", StringUtils.join(EMPTY_ARRAY_LIST));
assertEquals("", StringUtils.join(NULL_ARRAY_LIST));
assertEquals("null", StringUtils.join(NULL_TO_STRING_LIST));
assertEquals("abc", StringUtils.join("a", "b", "c"));
assertEquals("a", StringUtils.join(null, "a", ""));
assertEquals("foo", StringUtils.join(MIXED_ARRAY_LIST));
assertEquals("foo2", StringUtils.join(MIXED_TYPE_LIST));
}
@Test
void testJoin_Objects() {
assertEquals("abc", StringUtils.join("a", "b", "c"));
assertEquals("a", StringUtils.join(null, "", "a"));
assertNull(StringUtils.join((Object[]) null));
}
@ParameterizedTest
@ValueSource(strings = {",", ";", Supplementary.CharU20000, Supplementary.CharU20001})
void testJoinWith(final String delimiter) {
assertEquals("", StringUtils.joinWith(delimiter)); // empty array
assertEquals("", StringUtils.joinWith(delimiter, (Object[]) NULL_ARRAY_LIST));
assertEquals("null", StringUtils.joinWith(delimiter, NULL_TO_STRING_LIST)); // toString method prints 'null'
assertEquals(String.join(delimiter, "a", "b", "c"), StringUtils.joinWith(delimiter, "a", "b", "c"));
assertEquals(String.join(delimiter, "", "a", ""), StringUtils.joinWith(delimiter, null, "a", ""));
assertEquals(String.join(delimiter, "", "a", ""), StringUtils.joinWith(delimiter, "", "a", ""));
assertEquals("ab", StringUtils.joinWith(null, "a", "b"));
}
@Test
void testJoinWithThrowsException() {
assertIllegalArgumentException(() -> StringUtils.joinWith(",", (Object[]) null));
}
@Disabled
@Test
void testLang1593() {
final int[] arr = {1, 2, 3, 4, 5, 6, 7};
final String expected = StringUtils.join(arr, '-');
final String actual = StringUtils.join(arr, "-");
assertEquals(expected, actual);
}
@Test
void testLang623() {
assertEquals("t", StringUtils.replaceChars("\u00DE", '\u00DE', 't'));
assertEquals("t", StringUtils.replaceChars("\u00FE", '\u00FE', 't'));
}
@Test
void testLANG666() {
assertEquals("12", StringUtils.stripEnd("120.00", ".0"));
assertEquals("121", StringUtils.stripEnd("121.00", ".0"));
}
@Test
void testLeftPad_StringInt() {
assertNull(StringUtils.leftPad(null, 5));
assertEquals(" ", StringUtils.leftPad("", 5));
assertEquals(" abc", StringUtils.leftPad("abc", 5));
assertEquals("abc", StringUtils.leftPad("abc", 2));
}
@Test
void testLeftPad_StringIntChar() {
assertNull(StringUtils.leftPad(null, 5, ' '));
assertEquals(" ", StringUtils.leftPad("", 5, ' '));
assertEquals(" abc", StringUtils.leftPad("abc", 5, ' '));
assertEquals("xxabc", StringUtils.leftPad("abc", 5, 'x'));
assertEquals("\uffff\uffffabc", StringUtils.leftPad("abc", 5, '\uffff'));
assertEquals("abc", StringUtils.leftPad("abc", 2, ' '));
final String str = StringUtils.leftPad("aaa", 10000, 'a'); // bigger than pad length
assertEquals(10000, str.length());
assertTrue(StringUtils.containsOnly(str, 'a'));
}
@Test
void testLeftPad_StringIntString() {
assertNull(StringUtils.leftPad(null, 5, "-+"));
assertNull(StringUtils.leftPad(null, 5, null));
assertEquals(" ", StringUtils.leftPad("", 5, " "));
assertEquals("-+-+abc", StringUtils.leftPad("abc", 7, "-+"));
assertEquals("-+~abc", StringUtils.leftPad("abc", 6, "-+~"));
assertEquals("-+abc", StringUtils.leftPad("abc", 5, "-+~"));
assertEquals("abc", StringUtils.leftPad("abc", 2, " "));
assertEquals("abc", StringUtils.leftPad("abc", -1, " "));
assertEquals(" abc", StringUtils.leftPad("abc", 5, null));
assertEquals(" abc", StringUtils.leftPad("abc", 5, ""));
}
@Test
void testLength_CharBuffer() {
assertEquals(0, StringUtils.length(CharBuffer.wrap("")));
assertEquals(1, StringUtils.length(CharBuffer.wrap("A")));
assertEquals(1, StringUtils.length(CharBuffer.wrap(" ")));
assertEquals(8, StringUtils.length(CharBuffer.wrap("ABCDEFGH")));
}
@Test
void testLengthString() {
assertEquals(0, StringUtils.length(null));
assertEquals(0, StringUtils.length(""));
assertEquals(0, StringUtils.length(StringUtils.EMPTY));
assertEquals(1, StringUtils.length("A"));
assertEquals(1, StringUtils.length(" "));
assertEquals(8, StringUtils.length("ABCDEFGH"));
}
@Test
void testLengthStringBuffer() {
assertEquals(0, StringUtils.length(new StringBuffer("")));
assertEquals(0, StringUtils.length(new StringBuffer(StringUtils.EMPTY)));
assertEquals(1, StringUtils.length(new StringBuffer("A")));
assertEquals(1, StringUtils.length(new StringBuffer(" ")));
assertEquals(8, StringUtils.length(new StringBuffer("ABCDEFGH")));
}
@Test
void testLengthStringBuilder() {
assertEquals(0, StringUtils.length(new StringBuilder("")));
assertEquals(0, StringUtils.length(new StringBuilder(StringUtils.EMPTY)));
assertEquals(1, StringUtils.length(new StringBuilder("A")));
assertEquals(1, StringUtils.length(new StringBuilder(" ")));
assertEquals(8, StringUtils.length(new StringBuilder("ABCDEFGH")));
}
@Test
void testLowerCase() {
assertNull(StringUtils.lowerCase(null));
assertNull(StringUtils.lowerCase(null, Locale.ENGLISH));
assertEquals("foo test thing", StringUtils.lowerCase("fOo test THING"), "lowerCase(String) failed");
assertEquals("", StringUtils.lowerCase(""), "lowerCase(empty-string) failed");
assertEquals("foo test thing", StringUtils.lowerCase("fOo test THING", Locale.ENGLISH),
"lowerCase(String, Locale) failed");
assertEquals("", StringUtils.lowerCase("", Locale.ENGLISH), "lowerCase(empty-string, Locale) failed");
}
@Test
void testNormalizeSpace() {
// Java says a non-breaking whitespace is not a whitespace.
assertFalse(Character.isWhitespace('\u00A0'));
//
assertNull(StringUtils.normalizeSpace(null));
assertEquals("", StringUtils.normalizeSpace(""));
assertEquals("", StringUtils.normalizeSpace(" "));
assertEquals("", StringUtils.normalizeSpace("\t"));
assertEquals("", StringUtils.normalizeSpace("\n"));
assertEquals("", StringUtils.normalizeSpace("\u0009"));
assertEquals("", StringUtils.normalizeSpace("\u000B"));
assertEquals("", StringUtils.normalizeSpace("\u000C"));
assertEquals("", StringUtils.normalizeSpace("\u001C"));
assertEquals("", StringUtils.normalizeSpace("\u001D"));
assertEquals("", StringUtils.normalizeSpace("\u001E"));
assertEquals("", StringUtils.normalizeSpace("\u001F"));
assertEquals("", StringUtils.normalizeSpace("\f"));
assertEquals("", StringUtils.normalizeSpace("\r"));
assertEquals("a", StringUtils.normalizeSpace(" a "));
assertEquals("a b c", StringUtils.normalizeSpace(" a b c "));
assertEquals("a b c", StringUtils.normalizeSpace("a\t\f\r b\u000B c\n"));
assertEquals("a b c", StringUtils.normalizeSpace("a\t\f\r " + HARD_SPACE + HARD_SPACE + "b\u000B c\n"));
assertEquals("b", StringUtils.normalizeSpace("\u0000b"));
assertEquals("b", StringUtils.normalizeSpace("b\u0000"));
}
@Test
void testOverlay_StringStringIntInt() {
assertNull(StringUtils.overlay(null, null, 2, 4));
assertNull(StringUtils.overlay(null, null, -2, -4));
assertEquals("", StringUtils.overlay("", null, 0, 0));
assertEquals("", StringUtils.overlay("", "", 0, 0));
assertEquals("zzzz", StringUtils.overlay("", "zzzz", 0, 0));
assertEquals("zzzz", StringUtils.overlay("", "zzzz", 2, 4));
assertEquals("zzzz", StringUtils.overlay("", "zzzz", -2, -4));
assertEquals("abef", StringUtils.overlay("abcdef", null, 2, 4));
assertEquals("abef", StringUtils.overlay("abcdef", null, 4, 2));
assertEquals("abef", StringUtils.overlay("abcdef", "", 2, 4));
assertEquals("abef", StringUtils.overlay("abcdef", "", 4, 2));
assertEquals("abzzzzef", StringUtils.overlay("abcdef", "zzzz", 2, 4));
assertEquals("abzzzzef", StringUtils.overlay("abcdef", "zzzz", 4, 2));
assertEquals("zzzzef", StringUtils.overlay("abcdef", "zzzz", -1, 4));
assertEquals("zzzzef", StringUtils.overlay("abcdef", "zzzz", 4, -1));
assertEquals("zzzzabcdef", StringUtils.overlay("abcdef", "zzzz", -2, -1));
assertEquals("zzzzabcdef", StringUtils.overlay("abcdef", "zzzz", -1, -2));
assertEquals("abcdzzzz", StringUtils.overlay("abcdef", "zzzz", 4, 10));
assertEquals("abcdzzzz", StringUtils.overlay("abcdef", "zzzz", 10, 4));
assertEquals("abcdefzzzz", StringUtils.overlay("abcdef", "zzzz", 8, 10));
assertEquals("abcdefzzzz", StringUtils.overlay("abcdef", "zzzz", 10, 8));
}
/**
* Tests {@code prependIfMissing}.
*/
@Test
void testPrependIfMissing() {
assertNull(StringUtils.prependIfMissing(null, null), "prependIfMissing(null,null)");
assertEquals("abc", StringUtils.prependIfMissing("abc", null), "prependIfMissing(abc,null)");
assertEquals("xyz", StringUtils.prependIfMissing("", "xyz"), "prependIfMissing(\"\",xyz)");
assertEquals("xyzabc", StringUtils.prependIfMissing("abc", "xyz"), "prependIfMissing(abc,xyz)");
assertEquals("xyzabc", StringUtils.prependIfMissing("xyzabc", "xyz"), "prependIfMissing(xyzabc,xyz)");
assertEquals("xyzXYZabc", StringUtils.prependIfMissing("XYZabc", "xyz"), "prependIfMissing(XYZabc,xyz)");
assertNull(StringUtils.prependIfMissing(null, null, (CharSequence[]) null), "prependIfMissing(null,null null)");
assertEquals("abc", StringUtils.prependIfMissing("abc", null, (CharSequence[]) null), "prependIfMissing(abc,null,null)");
assertEquals("xyz", StringUtils.prependIfMissing("", "xyz", (CharSequence[]) null), "prependIfMissing(\"\",xyz,null)");
assertEquals("xyzabc", StringUtils.prependIfMissing("abc", "xyz", (CharSequence) null), "prependIfMissing(abc,xyz,{null})");
assertEquals("abc", StringUtils.prependIfMissing("abc", "xyz", ""), "prependIfMissing(abc,xyz,\"\")");
assertEquals("xyzabc", StringUtils.prependIfMissing("abc", "xyz", "mno"), "prependIfMissing(abc,xyz,mno)");
assertEquals("xyzabc", StringUtils.prependIfMissing("xyzabc", "xyz", "mno"), "prependIfMissing(xyzabc,xyz,mno)");
assertEquals("mnoabc", StringUtils.prependIfMissing("mnoabc", "xyz", "mno"), "prependIfMissing(mnoabc,xyz,mno)");
assertEquals("xyzXYZabc", StringUtils.prependIfMissing("XYZabc", "xyz", "mno"), "prependIfMissing(XYZabc,xyz,mno)");
assertEquals("xyzMNOabc", StringUtils.prependIfMissing("MNOabc", "xyz", "mno"), "prependIfMissing(MNOabc,xyz,mno)");
}
/**
* Tests {@code prependIfMissingIgnoreCase}.
*/
@Test
void testPrependIfMissingIgnoreCase() {
assertNull(StringUtils.prependIfMissingIgnoreCase(null, null), "prependIfMissingIgnoreCase(null,null)");
assertEquals("abc", StringUtils.prependIfMissingIgnoreCase("abc", null), "prependIfMissingIgnoreCase(abc,null)");
assertEquals("xyz", StringUtils.prependIfMissingIgnoreCase("", "xyz"), "prependIfMissingIgnoreCase(\"\",xyz)");
assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz"), "prependIfMissingIgnoreCase(abc,xyz)");
assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("xyzabc", "xyz"), "prependIfMissingIgnoreCase(xyzabc,xyz)");
assertEquals("XYZabc", StringUtils.prependIfMissingIgnoreCase("XYZabc", "xyz"), "prependIfMissingIgnoreCase(XYZabc,xyz)");
assertNull(StringUtils.prependIfMissingIgnoreCase(null, null, (CharSequence[]) null), "prependIfMissingIgnoreCase(null,null null)");
assertEquals("abc", StringUtils.prependIfMissingIgnoreCase("abc", null, (CharSequence[]) null), "prependIfMissingIgnoreCase(abc,null,null)");
assertEquals("xyz", StringUtils.prependIfMissingIgnoreCase("", "xyz", (CharSequence[]) null), "prependIfMissingIgnoreCase(\"\",xyz,null)");
assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz", (CharSequence) null), "prependIfMissingIgnoreCase(abc,xyz,{null})");
assertEquals("abc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz", ""), "prependIfMissingIgnoreCase(abc,xyz,\"\")");
assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("abc", "xyz", "mno"), "prependIfMissingIgnoreCase(abc,xyz,mno)");
assertEquals("xyzabc", StringUtils.prependIfMissingIgnoreCase("xyzabc", "xyz", "mno"), "prependIfMissingIgnoreCase(xyzabc,xyz,mno)");
assertEquals("mnoabc", StringUtils.prependIfMissingIgnoreCase("mnoabc", "xyz", "mno"), "prependIfMissingIgnoreCase(mnoabc,xyz,mno)");
assertEquals("XYZabc", StringUtils.prependIfMissingIgnoreCase("XYZabc", "xyz", "mno"), "prependIfMissingIgnoreCase(XYZabc,xyz,mno)");
assertEquals("MNOabc", StringUtils.prependIfMissingIgnoreCase("MNOabc", "xyz", "mno"), "prependIfMissingIgnoreCase(MNOabc,xyz,mno)");
}
@Test
void testReCapitalize() {
// reflection type of tests: Sentences.
assertEquals(SENTENCE_UNCAP, StringUtils.uncapitalize(StringUtils.capitalize(SENTENCE_UNCAP)),
"uncapitalize(capitalize(String)) failed");
assertEquals(SENTENCE_CAP, StringUtils.capitalize(StringUtils.uncapitalize(SENTENCE_CAP)),
"capitalize(uncapitalize(String)) failed");
// reflection type of tests: One word.
assertEquals(FOO_UNCAP, StringUtils.uncapitalize(StringUtils.capitalize(FOO_UNCAP)),
"uncapitalize(capitalize(String)) failed");
assertEquals(FOO_CAP, StringUtils.capitalize(StringUtils.uncapitalize(FOO_CAP)),
"capitalize(uncapitalize(String)) failed");
}
@Test
void testRemove_char() {
// StringUtils.remove(null, *) = null
assertNull(StringUtils.remove(null, null));
assertNull(StringUtils.remove(null, 'a'));
// StringUtils.remove("", *) = ""
assertEquals("", StringUtils.remove("", null));
assertEquals("", StringUtils.remove("", 'a'));
// StringUtils.remove("queued", 'u') = "qeed"
assertEquals("qeed", StringUtils.remove("queued", 'u'));
// StringUtils.remove("queued", 'z') = "queued"
assertEquals("queued", StringUtils.remove("queued", 'z'));
}
@Test
void testRemove_String() {
// StringUtils.remove(null, *) = null
assertNull(StringUtils.remove(null, null));
assertNull(StringUtils.remove(null, ""));
assertNull(StringUtils.remove(null, "a"));
// StringUtils.remove("", *) = ""
assertEquals("", StringUtils.remove("", null));
assertEquals("", StringUtils.remove("", ""));
assertEquals("", StringUtils.remove("", "a"));
// StringUtils.remove(*, null) = *
assertNull(StringUtils.remove(null, null));
assertEquals("", StringUtils.remove("", null));
assertEquals("a", StringUtils.remove("a", null));
// StringUtils.remove(*, "") = *
assertNull(StringUtils.remove(null, ""));
assertEquals("", StringUtils.remove("", ""));
assertEquals("a", StringUtils.remove("a", ""));
// StringUtils.remove("queued", "ue") = "qd"
assertEquals("qd", StringUtils.remove("queued", "ue"));
// StringUtils.remove("queued", "zz") = "queued"
assertEquals("queued", StringUtils.remove("queued", "zz"));
}
@Test
void testRemoveAll_StringString() {
assertNull(StringUtils.removeAll(null, ""));
assertEquals("any", StringUtils.removeAll("any", null));
assertEquals("any", StringUtils.removeAll("any", ""));
assertEquals("", StringUtils.removeAll("any", ".*"));
assertEquals("", StringUtils.removeAll("any", ".+"));
assertEquals("", StringUtils.removeAll("any", ".?"));
assertEquals("A\nB", StringUtils.removeAll("A<__>\n<__>B", "<.*>"));
assertEquals("AB", StringUtils.removeAll("A<__>\n<__>B", "(?s)<.*>"));
assertEquals("ABC123", StringUtils.removeAll("ABCabc123abc", "[a-z]"));
assertThrows(PatternSyntaxException.class, () -> StringUtils.removeAll("any", "{badRegexSyntax}"),
"StringUtils.removeAll expecting PatternSyntaxException");
}
@Test
void testRemoveEnd() {
// StringUtils.removeEnd("", *) = ""
assertNull(StringUtils.removeEnd(null, null));
assertNull(StringUtils.removeEnd(null, ""));
assertNull(StringUtils.removeEnd(null, "a"));
// StringUtils.removeEnd(*, null) = *
assertEquals(StringUtils.removeEnd("", null), "");
assertEquals(StringUtils.removeEnd("", ""), "");
assertEquals(StringUtils.removeEnd("", "a"), "");
// All others:
assertEquals(StringUtils.removeEnd("www.domain.com.", ".com"), "www.domain.com.");
assertEquals(StringUtils.removeEnd("www.domain.com", ".com"), "www.domain");
assertEquals(StringUtils.removeEnd("www.domain", ".com"), "www.domain");
assertEquals(StringUtils.removeEnd("domain.com", ""), "domain.com");
assertEquals(StringUtils.removeEnd("domain.com", null), "domain.com");
}
@Test
void testRemoveEndIgnoreCase() {
// StringUtils.removeEndIgnoreCase("", *) = ""
assertNull(StringUtils.removeEndIgnoreCase(null, null), "removeEndIgnoreCase(null, null)");
assertNull(StringUtils.removeEndIgnoreCase(null, ""), "removeEndIgnoreCase(null, \"\")");
assertNull(StringUtils.removeEndIgnoreCase(null, "a"), "removeEndIgnoreCase(null, \"a\")");
// StringUtils.removeEnd(*, null) = *
assertEquals(StringUtils.removeEndIgnoreCase("", null), "", "removeEndIgnoreCase(\"\", null)");
assertEquals(StringUtils.removeEndIgnoreCase("", ""), "", "removeEndIgnoreCase(\"\", \"\")");
assertEquals(StringUtils.removeEndIgnoreCase("", "a"), "", "removeEndIgnoreCase(\"\", \"a\")");
// All others:
assertEquals(StringUtils.removeEndIgnoreCase("www.domain.com.", ".com"), "www.domain.com.", "removeEndIgnoreCase(\"www.domain.com.\", \".com\")");
assertEquals(StringUtils.removeEndIgnoreCase("www.domain.com", ".com"), "www.domain", "removeEndIgnoreCase(\"www.domain.com\", \".com\")");
assertEquals(StringUtils.removeEndIgnoreCase("www.domain", ".com"), "www.domain", "removeEndIgnoreCase(\"www.domain\", \".com\")");
assertEquals(StringUtils.removeEndIgnoreCase("domain.com", ""), "domain.com", "removeEndIgnoreCase(\"domain.com\", \"\")");
assertEquals(StringUtils.removeEndIgnoreCase("domain.com", null), "domain.com", "removeEndIgnoreCase(\"domain.com\", null)");
// Case-insensitive:
assertEquals(StringUtils.removeEndIgnoreCase("www.domain.com", ".COM"), "www.domain", "removeEndIgnoreCase(\"www.domain.com\", \".COM\")");
assertEquals(StringUtils.removeEndIgnoreCase("www.domain.COM", ".com"), "www.domain", "removeEndIgnoreCase(\"www.domain.COM\", \".com\")");
}
@Test
void testRemoveFirst_StringString() {
assertNull(StringUtils.removeFirst(null, ""));
assertEquals("any", StringUtils.removeFirst("any", null));
assertEquals("any", StringUtils.removeFirst("any", ""));
assertEquals("", StringUtils.removeFirst("any", ".*"));
assertEquals("", StringUtils.removeFirst("any", ".+"));
assertEquals("bc", StringUtils.removeFirst("abc", ".?"));
assertEquals("A\n<__>B", StringUtils.removeFirst("A<__>\n<__>B", "<.*>"));
assertEquals("AB", StringUtils.removeFirst("A<__>\n<__>B", "(?s)<.*>"));
assertEquals("ABCbc123", StringUtils.removeFirst("ABCabc123", "[a-z]"));
assertEquals("ABC123abc", StringUtils.removeFirst("ABCabc123abc", "[a-z]+"));
assertThrows(PatternSyntaxException.class, () -> StringUtils.removeFirst("any", "{badRegexSyntax}"),
"StringUtils.removeFirst expecting PatternSyntaxException");
}
@Test
void testRemoveIgnoreCase_String() {
// StringUtils.removeIgnoreCase(null, *) = null
assertNull(StringUtils.removeIgnoreCase(null, null));
assertNull(StringUtils.removeIgnoreCase(null, ""));
assertNull(StringUtils.removeIgnoreCase(null, "a"));
// StringUtils.removeIgnoreCase("", *) = ""
assertEquals("", StringUtils.removeIgnoreCase("", null));
assertEquals("", StringUtils.removeIgnoreCase("", ""));
assertEquals("", StringUtils.removeIgnoreCase("", "a"));
// StringUtils.removeIgnoreCase(*, null) = *
assertNull(StringUtils.removeIgnoreCase(null, null));
assertEquals("", StringUtils.removeIgnoreCase("", null));
assertEquals("a", StringUtils.removeIgnoreCase("a", null));
// StringUtils.removeIgnoreCase(*, "") = *
assertNull(StringUtils.removeIgnoreCase(null, ""));
assertEquals("", StringUtils.removeIgnoreCase("", ""));
assertEquals("a", StringUtils.removeIgnoreCase("a", ""));
// StringUtils.removeIgnoreCase("queued", "ue") = "qd"
assertEquals("qd", StringUtils.removeIgnoreCase("queued", "ue"));
// StringUtils.removeIgnoreCase("queued", "zz") = "queued"
assertEquals("queued", StringUtils.removeIgnoreCase("queued", "zz"));
// IgnoreCase
// StringUtils.removeIgnoreCase("quEUed", "UE") = "qd"
assertEquals("qd", StringUtils.removeIgnoreCase("quEUed", "UE"));
// StringUtils.removeIgnoreCase("queued", "zZ") = "queued"
assertEquals("queued", StringUtils.removeIgnoreCase("queued", "zZ"));
// StringUtils.removeIgnoreCase("\u0130x", "x") = "\u0130"
assertEquals("\u0130", StringUtils.removeIgnoreCase("\u0130x", "x"));
// LANG-1453
StringUtils.removeIgnoreCase("��a", "a");
}
@Test
void testRemovePattern_StringString() {
assertNull(StringUtils.removePattern(null, ""));
assertEquals("any", StringUtils.removePattern("any", null));
assertEquals("", StringUtils.removePattern("", ""));
assertEquals("", StringUtils.removePattern("", ".*"));
assertEquals("", StringUtils.removePattern("", ".+"));
assertEquals("AB", StringUtils.removePattern("A<__>\n<__>B", "<.*>"));
assertEquals("AB", StringUtils.removePattern("A<__>\\n<__>B", "<.*>"));
assertEquals("", StringUtils.removePattern("<A>x\\ny</A>", "<A>.*</A>"));
assertEquals("", StringUtils.removePattern("<A>\nxy\n</A>", "<A>.*</A>"));
assertEquals("ABC123", StringUtils.removePattern("ABCabc123", "[a-z]"));
}
@Test
void testRemoveStartChar() {
// StringUtils.removeStart("", *) = ""
assertNull(StringUtils.removeStart(null, '\0'));
assertNull(StringUtils.removeStart(null, 'a'));
// StringUtils.removeStart(*, null) = *
assertEquals(StringUtils.removeStart("", '\0'), "");
assertEquals(StringUtils.removeStart("", 'a'), "");
// All others:
assertEquals(StringUtils.removeStart("/path", '/'), "path");
assertEquals(StringUtils.removeStart("path", '/'), "path");
assertEquals(StringUtils.removeStart("path", '\0'), "path");
}
@Test
void testRemoveStartIgnoreCase() {
// StringUtils.removeStart("", *) = ""
assertNull(StringUtils.removeStartIgnoreCase(null, null), "removeStartIgnoreCase(null, null)");
assertNull(StringUtils.removeStartIgnoreCase(null, ""), "removeStartIgnoreCase(null, \"\")");
assertNull(StringUtils.removeStartIgnoreCase(null, "a"), "removeStartIgnoreCase(null, \"a\")");
// StringUtils.removeStart(*, null) = *
assertEquals(StringUtils.removeStartIgnoreCase("", null), "", "removeStartIgnoreCase(\"\", null)");
assertEquals(StringUtils.removeStartIgnoreCase("", ""), "", "removeStartIgnoreCase(\"\", \"\")");
assertEquals(StringUtils.removeStartIgnoreCase("", "a"), "", "removeStartIgnoreCase(\"\", \"a\")");
// All others:
assertEquals(StringUtils.removeStartIgnoreCase("www.domain.com", "www."), "domain.com", "removeStartIgnoreCase(\"www.domain.com\", \"www.\")");
assertEquals(StringUtils.removeStartIgnoreCase("domain.com", "www."), "domain.com", "removeStartIgnoreCase(\"domain.com\", \"www.\")");
assertEquals(StringUtils.removeStartIgnoreCase("domain.com", ""), "domain.com", "removeStartIgnoreCase(\"domain.com\", \"\")");
assertEquals(StringUtils.removeStartIgnoreCase("domain.com", null), "domain.com", "removeStartIgnoreCase(\"domain.com\", null)");
// Case-insensitive:
assertEquals(StringUtils.removeStartIgnoreCase("www.domain.com", "WWW."), "domain.com", "removeStartIgnoreCase(\"www.domain.com\", \"WWW.\")");
}
@Test
void testRemoveStartString() {
// StringUtils.removeStart("", *) = ""
assertNull(StringUtils.removeStart(null, null));
assertNull(StringUtils.removeStart(null, ""));
assertNull(StringUtils.removeStart(null, "a"));
// StringUtils.removeStart(*, null) = *
assertEquals(StringUtils.removeStart("", null), "");
assertEquals(StringUtils.removeStart("", ""), "");
assertEquals(StringUtils.removeStart("", "a"), "");
// All others:
assertEquals(StringUtils.removeStart("www.domain.com", "www."), "domain.com");
assertEquals(StringUtils.removeStart("domain.com", "www."), "domain.com");
assertEquals(StringUtils.removeStart("domain.com", ""), "domain.com");
assertEquals(StringUtils.removeStart("domain.com", null), "domain.com");
}
@Test
void testRepeat_CharInt() {
assertEquals("zzz", StringUtils.repeat('z', 3));
assertEquals("", StringUtils.repeat('z', 0));
assertEquals("", StringUtils.repeat('z', -2));
}
@Test
void testRepeat_StringInt() {
assertNull(StringUtils.repeat(null, 2));
assertEquals("", StringUtils.repeat("ab", 0));
assertEquals("", StringUtils.repeat("", 3));
assertEquals("aaa", StringUtils.repeat("a", 3));
assertEquals("", StringUtils.repeat("a", -2));
assertEquals("ababab", StringUtils.repeat("ab", 3));
assertEquals("abcabcabc", StringUtils.repeat("abc", 3));
final String str = StringUtils.repeat("a", 10000); // bigger than pad limit
assertEquals(10000, str.length());
assertTrue(StringUtils.containsOnly(str, 'a'));
}
@Test
void testRepeat_StringStringInt() {
assertNull(StringUtils.repeat(null, null, 2));
assertNull(StringUtils.repeat(null, "x", 2));
assertEquals("", StringUtils.repeat("", null, 2));
assertEquals("", StringUtils.repeat("ab", "", 0));
assertEquals("", StringUtils.repeat("", "", 2));
assertEquals("xx", StringUtils.repeat("", "x", 3));
assertEquals("?, ?, ?", StringUtils.repeat("?", ", ", 3));
}
/**
* Test method for 'StringUtils.replaceEach(String, String[], String[])'
*/
@Test
void testReplace_StringStringArrayStringArray() {
//JAVADOC TESTS START
assertNull(StringUtils.replaceEach(null, new String[]{"a"}, new String[]{"b"}));
assertEquals(StringUtils.replaceEach("", new String[]{"a"}, new String[]{"b"}), "");
assertEquals(StringUtils.replaceEach("aba", null, null), "aba");
assertEquals(StringUtils.replaceEach("aba", new String[0], null), "aba");
assertEquals(StringUtils.replaceEach("aba", null, new String[0]), "aba");
assertEquals(StringUtils.replaceEach("aba", new String[]{"a"}, null), "aba");
assertEquals(StringUtils.replaceEach("aba", new String[]{"a"}, new String[]{""}), "b");
assertEquals(StringUtils.replaceEach("aba", new String[]{null}, new String[]{"a"}), "aba");
assertEquals(StringUtils.replaceEach("abcde", new String[]{"ab", "d"}, new String[]{"w", "t"}), "wcte");
assertEquals(StringUtils.replaceEach("abcde", new String[]{"ab", "d"}, new String[]{"d", "t"}), "dcte");
//JAVADOC TESTS END
assertEquals("bcc", StringUtils.replaceEach("abc", new String[]{"a", "b"}, new String[]{"b", "c"}));
assertEquals("q651.506bera", StringUtils.replaceEach("d216.102oren",
new String[]{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n",
"o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D",
"E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T",
"U", "V", "W", "X", "Y", "Z", "1", "2", "3", "4", "5", "6", "7", "8", "9"},
new String[]{"n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "a",
"b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "N", "O", "P", "Q",
"R", "S", "T", "U", "V", "W", "X", "Y", "Z", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "5", "6", "7", "8", "9", "1", "2", "3", "4"}));
// Test null safety inside arrays - LANG-552
assertEquals(StringUtils.replaceEach("aba", new String[]{"a"}, new String[]{null}), "aba");
assertEquals(StringUtils.replaceEach("aba", new String[]{"a", "b"}, new String[]{"c", null}), "cbc");
assertIllegalArgumentException(() -> StringUtils.replaceEach("abba", new String[] { "a" }, new String[] { "b", "a" }),
"StringUtils.replaceEach(String, String[], String[]) expecting IllegalArgumentException");
}
/**
* Test method for 'StringUtils.replaceEachRepeatedly(String, String[], String[])'
*/
@Test
void testReplace_StringStringArrayStringArrayBoolean() {
//JAVADOC TESTS START
assertNull(StringUtils.replaceEachRepeatedly(null, new String[]{"a"}, new String[]{"b"}));
assertEquals("", StringUtils.replaceEachRepeatedly("", new String[]{"a"}, new String[]{"b"}));
assertEquals("aba", StringUtils.replaceEachRepeatedly("aba", null, null));
assertEquals("aba", StringUtils.replaceEachRepeatedly("aba", new String[0], null));
assertEquals("aba", StringUtils.replaceEachRepeatedly("aba", null, new String[0]));
assertEquals("aba", StringUtils.replaceEachRepeatedly("aba", new String[0], null));
assertEquals("b", StringUtils.replaceEachRepeatedly("aba", new String[]{"a"}, new String[]{""}));
assertEquals("aba", StringUtils.replaceEachRepeatedly("aba", new String[]{null}, new String[]{"a"}));
assertEquals("wcte", StringUtils.replaceEachRepeatedly("abcde", new String[]{"ab", "d"}, new String[]{"w", "t"}));
assertEquals("tcte", StringUtils.replaceEachRepeatedly("abcde", new String[]{"ab", "d"}, new String[]{"d", "t"}));
// Test recursive replacement - LANG-1528 & LANG-1753
assertEquals("blaan", StringUtils.replaceEachRepeatedly("blllaan", new String[]{"llaan"}, new String[]{"laan"}));
assertEquals("blaan", StringUtils.replaceEachRepeatedly("bllllaan", new String[]{"llaan"}, new String[]{"laan"}));
// Test default TTL for smaller search lists. 32 characters reduced to 16, then 8, 4, 2, 1.
assertEquals("a", StringUtils.replaceEachRepeatedly("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
new String[]{"aa"}, new String[]{"a"}));
// Test default TTL exceeded. 33 characters reduced to 17, then 9, 5, 3, 2 (still found).
assertThrows(IllegalStateException.class,
() -> StringUtils.replaceEachRepeatedly("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", new String[] { "aa" }, new String[] { "a" }),
"Cannot be resolved within the default time-to-live limit");
// Test larger TTL for larger search lists. Replace repeatedly until there are no more possible replacements.
assertEquals("000000000", StringUtils.replaceEachRepeatedly("aA0aA0aA0",
new String[]{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n",
"o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D",
"E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T",
"U", "V", "W", "X", "Y", "Z", "1", "2", "3", "4", "5", "6", "7", "8", "9"},
new String[]{"b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o",
"p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E",
"F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U",
"V", "W", "X", "Y", "Z", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0"}));
// Test long infinite cycle: a -> b -> ... -> 9 -> 0 -> a -> b -> ...
assertThrows(IllegalStateException.class,
() -> StringUtils.replaceEachRepeatedly("a",
new String[]{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n",
"o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D",
"E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T",
"U", "V", "W", "X", "Y", "Z", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0"},
new String[]{"b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o",
"p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E",
"F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U",
"V", "W", "X", "Y", "Z", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "a"}),
"Should be a circular reference");
assertThrows(IllegalStateException.class,
() -> StringUtils.replaceEachRepeatedly("%{key1}",
new String[] {"%{key1}", "%{key2}", "%{key3}"},
new String[] {"Key1 %{key2}", "Key2 %{key3}", "Key3 %{key1}"}),
"Should be a circular reference");
assertThrows(IllegalStateException.class,
() -> StringUtils.replaceEachRepeatedly("abcde", new String[]{"ab", "d"}, new String[]{"d", "ab"}),
"Should be a circular reference");
//JAVADOC TESTS END
}
@Test
void testReplace_StringStringString() {
assertNull(StringUtils.replace(null, null, null));
assertNull(StringUtils.replace(null, null, "any"));
assertNull(StringUtils.replace(null, "any", null));
assertNull(StringUtils.replace(null, "any", "any"));
assertEquals("", StringUtils.replace("", null, null));
assertEquals("", StringUtils.replace("", null, "any"));
assertEquals("", StringUtils.replace("", "any", null));
assertEquals("", StringUtils.replace("", "any", "any"));
assertEquals("FOO", StringUtils.replace("FOO", "", "any"));
assertEquals("FOO", StringUtils.replace("FOO", null, "any"));
assertEquals("FOO", StringUtils.replace("FOO", "F", null));
assertEquals("FOO", StringUtils.replace("FOO", null, null));
assertEquals("", StringUtils.replace("foofoofoo", "foo", ""));
assertEquals("barbarbar", StringUtils.replace("foofoofoo", "foo", "bar"));
assertEquals("farfarfar", StringUtils.replace("foofoofoo", "oo", "ar"));
}
@Test
void testReplace_StringStringStringInt() {
assertNull(StringUtils.replace(null, null, null, 2));
assertNull(StringUtils.replace(null, null, "any", 2));
assertNull(StringUtils.replace(null, "any", null, 2));
assertNull(StringUtils.replace(null, "any", "any", 2));
assertEquals("", StringUtils.replace("", null, null, 2));
assertEquals("", StringUtils.replace("", null, "any", 2));
assertEquals("", StringUtils.replace("", "any", null, 2));
assertEquals("", StringUtils.replace("", "any", "any", 2));
final String str = new String(new char[]{'o', 'o', 'f', 'o', 'o'});
assertSame(str, StringUtils.replace(str, "x", "", -1));
assertEquals("f", StringUtils.replace("oofoo", "o", "", -1));
assertEquals("oofoo", StringUtils.replace("oofoo", "o", "", 0));
assertEquals("ofoo", StringUtils.replace("oofoo", "o", "", 1));
assertEquals("foo", StringUtils.replace("oofoo", "o", "", 2));
assertEquals("fo", StringUtils.replace("oofoo", "o", "", 3));
assertEquals("f", StringUtils.replace("oofoo", "o", "", 4));
assertEquals("f", StringUtils.replace("oofoo", "o", "", -5));
assertEquals("f", StringUtils.replace("oofoo", "o", "", 1000));
}
@Test
void testReplaceAll_StringStringString() {
assertNull(StringUtils.replaceAll(null, "", ""));
assertEquals("any", StringUtils.replaceAll("any", null, ""));
assertEquals("any", StringUtils.replaceAll("any", "", null));
assertEquals("zzz", StringUtils.replaceAll("", "", "zzz"));
assertEquals("zzz", StringUtils.replaceAll("", ".*", "zzz"));
assertEquals("", StringUtils.replaceAll("", ".+", "zzz"));
assertEquals("ZZaZZbZZcZZ", StringUtils.replaceAll("abc", "", "ZZ"));
assertEquals("z\nz", StringUtils.replaceAll("<__>\n<__>", "<.*>", "z"));
assertEquals("z", StringUtils.replaceAll("<__>\n<__>", "(?s)<.*>", "z"));
assertEquals("ABC___123", StringUtils.replaceAll("ABCabc123", "[a-z]", "_"));
assertEquals("ABC_123", StringUtils.replaceAll("ABCabc123", "[^A-Z0-9]+", "_"));
assertEquals("ABC123", StringUtils.replaceAll("ABCabc123", "[^A-Z0-9]+", ""));
assertEquals("Lorem_ipsum_dolor_sit",
StringUtils.replaceAll("Lorem ipsum dolor sit", "( +)([a-z]+)", "_$2"));
assertThrows(PatternSyntaxException.class, () -> StringUtils.replaceAll("any", "{badRegexSyntax}", ""),
"StringUtils.replaceAll expecting PatternSyntaxException");
}
@Test
void testReplaceChars_StringCharChar() {
assertNull(StringUtils.replaceChars(null, 'b', 'z'));
assertEquals("", StringUtils.replaceChars("", 'b', 'z'));
assertEquals("azcza", StringUtils.replaceChars("abcba", 'b', 'z'));
assertEquals("abcba", StringUtils.replaceChars("abcba", 'x', 'z'));
}
@Test
void testReplaceChars_StringStringString() {
assertNull(StringUtils.replaceChars(null, null, null));
assertNull(StringUtils.replaceChars(null, "", null));
assertNull(StringUtils.replaceChars(null, "a", null));
assertNull(StringUtils.replaceChars(null, null, ""));
assertNull(StringUtils.replaceChars(null, null, "x"));
assertEquals("", StringUtils.replaceChars("", null, null));
assertEquals("", StringUtils.replaceChars("", "", null));
assertEquals("", StringUtils.replaceChars("", "a", null));
assertEquals("", StringUtils.replaceChars("", null, ""));
assertEquals("", StringUtils.replaceChars("", null, "x"));
assertEquals("abc", StringUtils.replaceChars("abc", null, null));
assertEquals("abc", StringUtils.replaceChars("abc", null, ""));
assertEquals("abc", StringUtils.replaceChars("abc", null, "x"));
assertEquals("abc", StringUtils.replaceChars("abc", "", null));
assertEquals("abc", StringUtils.replaceChars("abc", "", ""));
assertEquals("abc", StringUtils.replaceChars("abc", "", "x"));
assertEquals("ac", StringUtils.replaceChars("abc", "b", null));
assertEquals("ac", StringUtils.replaceChars("abc", "b", ""));
assertEquals("axc", StringUtils.replaceChars("abc", "b", "x"));
assertEquals("ayzya", StringUtils.replaceChars("abcba", "bc", "yz"));
assertEquals("ayya", StringUtils.replaceChars("abcba", "bc", "y"));
assertEquals("ayzya", StringUtils.replaceChars("abcba", "bc", "yzx"));
assertEquals("abcba", StringUtils.replaceChars("abcba", "z", "w"));
assertSame("abcba", StringUtils.replaceChars("abcba", "z", "w"));
// Javadoc examples:
assertEquals("jelly", StringUtils.replaceChars("hello", "ho", "jy"));
assertEquals("ayzya", StringUtils.replaceChars("abcba", "bc", "yz"));
assertEquals("ayya", StringUtils.replaceChars("abcba", "bc", "y"));
assertEquals("ayzya", StringUtils.replaceChars("abcba", "bc", "yzx"));
// From https://issues.apache.org/bugzilla/show_bug.cgi?id=25454
assertEquals("bcc", StringUtils.replaceChars("abc", "ab", "bc"));
assertEquals("q651.506bera", StringUtils.replaceChars("d216.102oren",
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789",
"nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM567891234"));
}
@Test
void testReplaceFirst_StringStringString() {
assertNull(StringUtils.replaceFirst(null, "", ""));
assertEquals("any", StringUtils.replaceFirst("any", null, ""));
assertEquals("any", StringUtils.replaceFirst("any", "", null));
assertEquals("zzz", StringUtils.replaceFirst("", "", "zzz"));
assertEquals("zzz", StringUtils.replaceFirst("", ".*", "zzz"));
assertEquals("", StringUtils.replaceFirst("", ".+", "zzz"));
assertEquals("ZZabc", StringUtils.replaceFirst("abc", "", "ZZ"));
assertEquals("z\n<__>", StringUtils.replaceFirst("<__>\n<__>", "<.*>", "z"));
assertEquals("z", StringUtils.replaceFirst("<__>\n<__>", "(?s)<.*>", "z"));
assertEquals("ABC_bc123", StringUtils.replaceFirst("ABCabc123", "[a-z]", "_"));
assertEquals("ABC_123abc", StringUtils.replaceFirst("ABCabc123abc", "[^A-Z0-9]+", "_"));
assertEquals("ABC123abc", StringUtils.replaceFirst("ABCabc123abc", "[^A-Z0-9]+", ""));
assertEquals("Lorem_ipsum dolor sit",
StringUtils.replaceFirst("Lorem ipsum dolor sit", "( +)([a-z]+)", "_$2"));
assertThrows(PatternSyntaxException.class, () -> StringUtils.replaceFirst("any", "{badRegexSyntax}", ""),
"StringUtils.replaceFirst expecting PatternSyntaxException");
}
@Test
void testReplaceIgnoreCase_StringStringString() {
assertNull(StringUtils.replaceIgnoreCase(null, null, null));
assertNull(StringUtils.replaceIgnoreCase(null, null, "any"));
assertNull(StringUtils.replaceIgnoreCase(null, "any", null));
assertNull(StringUtils.replaceIgnoreCase(null, "any", "any"));
assertEquals("", StringUtils.replaceIgnoreCase("", null, null));
assertEquals("", StringUtils.replaceIgnoreCase("", null, "any"));
assertEquals("", StringUtils.replaceIgnoreCase("", "any", null));
assertEquals("", StringUtils.replaceIgnoreCase("", "any", "any"));
assertEquals("FOO", StringUtils.replaceIgnoreCase("FOO", "", "any"));
assertEquals("FOO", StringUtils.replaceIgnoreCase("FOO", null, "any"));
assertEquals("FOO", StringUtils.replaceIgnoreCase("FOO", "F", null));
assertEquals("FOO", StringUtils.replaceIgnoreCase("FOO", null, null));
assertEquals("", StringUtils.replaceIgnoreCase("foofoofoo", "foo", ""));
assertEquals("barbarbar", StringUtils.replaceIgnoreCase("foofoofoo", "foo", "bar"));
assertEquals("farfarfar", StringUtils.replaceIgnoreCase("foofoofoo", "oo", "ar"));
// IgnoreCase
assertEquals("", StringUtils.replaceIgnoreCase("foofoofoo", "FOO", ""));
assertEquals("barbarbar", StringUtils.replaceIgnoreCase("fooFOOfoo", "foo", "bar"));
assertEquals("farfarfar", StringUtils.replaceIgnoreCase("foofOOfoo", "OO", "ar"));
}
@Test
void testReplaceIgnoreCase_StringStringStringInt() {
assertNull(StringUtils.replaceIgnoreCase(null, null, null, 2));
assertNull(StringUtils.replaceIgnoreCase(null, null, "any", 2));
assertNull(StringUtils.replaceIgnoreCase(null, "any", null, 2));
assertNull(StringUtils.replaceIgnoreCase(null, "any", "any", 2));
assertEquals("", StringUtils.replaceIgnoreCase("", null, null, 2));
assertEquals("", StringUtils.replaceIgnoreCase("", null, "any", 2));
assertEquals("", StringUtils.replaceIgnoreCase("", "any", null, 2));
assertEquals("", StringUtils.replaceIgnoreCase("", "any", "any", 2));
final String str = new String(new char[] { 'o', 'o', 'f', 'o', 'o' });
assertSame(str, StringUtils.replaceIgnoreCase(str, "x", "", -1));
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "o", "", -1));
assertEquals("oofoo", StringUtils.replaceIgnoreCase("oofoo", "o", "", 0));
assertEquals("ofoo", StringUtils.replaceIgnoreCase("oofoo", "o", "", 1));
assertEquals("foo", StringUtils.replaceIgnoreCase("oofoo", "o", "", 2));
assertEquals("fo", StringUtils.replaceIgnoreCase("oofoo", "o", "", 3));
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "o", "", 4));
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "o", "", -5));
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "o", "", 1000));
// IgnoreCase
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "O", "", -1));
assertEquals("oofoo", StringUtils.replaceIgnoreCase("oofoo", "O", "", 0));
assertEquals("ofoo", StringUtils.replaceIgnoreCase("oofoo", "O", "", 1));
assertEquals("foo", StringUtils.replaceIgnoreCase("oofoo", "O", "", 2));
assertEquals("fo", StringUtils.replaceIgnoreCase("oofoo", "O", "", 3));
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "O", "", 4));
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "O", "", -5));
assertEquals("f", StringUtils.replaceIgnoreCase("oofoo", "O", "", 1000));
}
@Test
void testReplaceOnce_StringStringString() {
assertNull(StringUtils.replaceOnce(null, null, null));
assertNull(StringUtils.replaceOnce(null, null, "any"));
assertNull(StringUtils.replaceOnce(null, "any", null));
assertNull(StringUtils.replaceOnce(null, "any", "any"));
assertEquals("", StringUtils.replaceOnce("", null, null));
assertEquals("", StringUtils.replaceOnce("", null, "any"));
assertEquals("", StringUtils.replaceOnce("", "any", null));
assertEquals("", StringUtils.replaceOnce("", "any", "any"));
assertEquals("FOO", StringUtils.replaceOnce("FOO", "", "any"));
assertEquals("FOO", StringUtils.replaceOnce("FOO", null, "any"));
assertEquals("FOO", StringUtils.replaceOnce("FOO", "F", null));
assertEquals("FOO", StringUtils.replaceOnce("FOO", null, null));
assertEquals("foofoo", StringUtils.replaceOnce("foofoofoo", "foo", ""));
}
@Test
void testReplaceOnceIgnoreCase_StringStringString() {
assertNull(StringUtils.replaceOnceIgnoreCase(null, null, null));
assertNull(StringUtils.replaceOnceIgnoreCase(null, null, "any"));
assertNull(StringUtils.replaceOnceIgnoreCase(null, "any", null));
assertNull(StringUtils.replaceOnceIgnoreCase(null, "any", "any"));
assertEquals("", StringUtils.replaceOnceIgnoreCase("", null, null));
assertEquals("", StringUtils.replaceOnceIgnoreCase("", null, "any"));
assertEquals("", StringUtils.replaceOnceIgnoreCase("", "any", null));
assertEquals("", StringUtils.replaceOnceIgnoreCase("", "any", "any"));
assertEquals("FOO", StringUtils.replaceOnceIgnoreCase("FOO", "", "any"));
assertEquals("FOO", StringUtils.replaceOnceIgnoreCase("FOO", null, "any"));
assertEquals("FOO", StringUtils.replaceOnceIgnoreCase("FOO", "F", null));
assertEquals("FOO", StringUtils.replaceOnceIgnoreCase("FOO", null, null));
assertEquals("foofoo", StringUtils.replaceOnceIgnoreCase("foofoofoo", "foo", ""));
// Ignore Case
assertEquals("Foofoo", StringUtils.replaceOnceIgnoreCase("FoOFoofoo", "foo", ""));
}
@Test
void testReplacePattern_StringStringString() {
assertNull(StringUtils.replacePattern(null, "", ""));
assertEquals("any", StringUtils.replacePattern("any", null, ""));
assertEquals("any", StringUtils.replacePattern("any", "", null));
assertEquals("zzz", StringUtils.replacePattern("", "", "zzz"));
assertEquals("zzz", StringUtils.replacePattern("", ".*", "zzz"));
assertEquals("", StringUtils.replacePattern("", ".+", "zzz"));
assertEquals("z", StringUtils.replacePattern("<__>\n<__>", "<.*>", "z"));
assertEquals("z", StringUtils.replacePattern("<__>\\n<__>", "<.*>", "z"));
assertEquals("X", StringUtils.replacePattern("<A>\nxy\n</A>", "<A>.*</A>", "X"));
assertEquals("ABC___123", StringUtils.replacePattern("ABCabc123", "[a-z]", "_"));
assertEquals("ABC_123", StringUtils.replacePattern("ABCabc123", "[^A-Z0-9]+", "_"));
assertEquals("ABC123", StringUtils.replacePattern("ABCabc123", "[^A-Z0-9]+", ""));
assertEquals("Lorem_ipsum_dolor_sit",
StringUtils.replacePattern("Lorem ipsum dolor sit", "( +)([a-z]+)", "_$2"));
}
@Test
void testReverse_String() {
assertNull(StringUtils.reverse(null));
assertEquals("", StringUtils.reverse(""));
assertEquals("sdrawkcab", StringUtils.reverse("backwards"));
}
@Test
void testReverseDelimited_StringChar() {
assertNull(StringUtils.reverseDelimited(null, '.'));
assertEquals("", StringUtils.reverseDelimited("", '.'));
assertEquals("c.b.a", StringUtils.reverseDelimited("a.b.c", '.'));
assertEquals("a b c", StringUtils.reverseDelimited("a b c", '.'));
assertEquals("", StringUtils.reverseDelimited("", '.'));
}
@Test
void testRightPad_StringInt() {
assertNull(StringUtils.rightPad(null, 5));
assertEquals(" ", StringUtils.rightPad("", 5));
assertEquals("abc ", StringUtils.rightPad("abc", 5));
assertEquals("abc", StringUtils.rightPad("abc", 2));
assertEquals("abc", StringUtils.rightPad("abc", -1));
}
@Test
void testRightPad_StringIntChar() {
assertNull(StringUtils.rightPad(null, 5, ' '));
assertEquals(" ", StringUtils.rightPad("", 5, ' '));
assertEquals("abc ", StringUtils.rightPad("abc", 5, ' '));
assertEquals("abc", StringUtils.rightPad("abc", 2, ' '));
assertEquals("abc", StringUtils.rightPad("abc", -1, ' '));
assertEquals("abcxx", StringUtils.rightPad("abc", 5, 'x'));
final String str = StringUtils.rightPad("aaa", 10000, 'a'); // bigger than pad length
assertEquals(10000, str.length());
assertTrue(StringUtils.containsOnly(str, 'a'));
}
@Test
void testRightPad_StringIntString() {
assertNull(StringUtils.rightPad(null, 5, "-+"));
assertEquals(" ", StringUtils.rightPad("", 5, " "));
assertNull(StringUtils.rightPad(null, 8, null));
assertEquals("abc-+-+", StringUtils.rightPad("abc", 7, "-+"));
assertEquals("abc-+~", StringUtils.rightPad("abc", 6, "-+~"));
assertEquals("abc-+", StringUtils.rightPad("abc", 5, "-+~"));
assertEquals("abc", StringUtils.rightPad("abc", 2, " "));
assertEquals("abc", StringUtils.rightPad("abc", -1, " "));
assertEquals("abc ", StringUtils.rightPad("abc", 5, null));
assertEquals("abc ", StringUtils.rightPad("abc", 5, ""));
}
@Test
void testRotate_StringInt() {
assertNull(StringUtils.rotate(null, 1));
assertEquals("", StringUtils.rotate("", 1));
assertEquals("abcdefg", StringUtils.rotate("abcdefg", 0));
assertEquals("fgabcde", StringUtils.rotate("abcdefg", 2));
assertEquals("cdefgab", StringUtils.rotate("abcdefg", -2));
assertEquals("abcdefg", StringUtils.rotate("abcdefg", 7));
assertEquals("abcdefg", StringUtils.rotate("abcdefg", -7));
assertEquals("fgabcde", StringUtils.rotate("abcdefg", 9));
assertEquals("cdefgab", StringUtils.rotate("abcdefg", -9));
assertEquals("efgabcd", StringUtils.rotate("abcdefg", 17));
assertEquals("defgabc", StringUtils.rotate("abcdefg", -17));
}
@Test
void testSplit_String() {
assertNull(StringUtils.split(null));
assertEquals(0, StringUtils.split("").length);
String str = "a b .c";
String[] res = StringUtils.split(str);
assertEquals(3, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals(".c", res[2]);
str = " a ";
res = StringUtils.split(str);
assertEquals(1, res.length);
assertEquals("a", res[0]);
str = "a" + WHITESPACE + "b" + NON_WHITESPACE + "c";
res = StringUtils.split(str);
assertEquals(2, res.length);
assertEquals("a", res[0]);
assertEquals("b" + NON_WHITESPACE + "c", res[1]);
}
@Test
void testSplit_StringChar() {
assertNull(StringUtils.split(null, '.'));
assertEquals(0, StringUtils.split("", '.').length);
String str = "a.b.. c";
String[] res = StringUtils.split(str, '.');
assertEquals(3, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals(" c", res[2]);
str = ".a.";
res = StringUtils.split(str, '.');
assertEquals(1, res.length);
assertEquals("a", res[0]);
str = "a b c";
res = StringUtils.split(str, ' ');
assertEquals(3, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals("c", res[2]);
}
@Test
void testSplit_StringString_StringStringInt() {
assertNull(StringUtils.split(null, "."));
assertNull(StringUtils.split(null, ".", 3));
assertEquals(0, StringUtils.split("", ".").length);
assertEquals(0, StringUtils.split("", ".", 3).length);
innerTestSplit('.', ".", ' ');
innerTestSplit('.', ".", ',');
innerTestSplit('.', ".,", 'x');
for (int i = 0; i < WHITESPACE.length(); i++) {
for (int j = 0; j < NON_WHITESPACE.length(); j++) {
innerTestSplit(WHITESPACE.charAt(i), null, NON_WHITESPACE.charAt(j));
innerTestSplit(WHITESPACE.charAt(i), String.valueOf(WHITESPACE.charAt(i)), NON_WHITESPACE.charAt(j));
}
}
String[] results;
final String[] expectedResults = {"ab", "de fg"};
results = StringUtils.split("ab de fg", null, 2);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
final String[] expectedResults2 = {"ab", "cd:ef"};
results = StringUtils.split("ab:cd:ef", ":", 2);
assertEquals(expectedResults2.length, results.length);
for (int i = 0; i < expectedResults2.length; i++) {
assertEquals(expectedResults2[i], results[i]);
}
}
@Test
void testSplitByCharacterType() {
assertNull(StringUtils.splitByCharacterType(null));
assertEquals(0, StringUtils.splitByCharacterType("").length);
assertTrue(Objects.deepEquals(new String[]{"ab", " ", "de", " ",
"fg"}, StringUtils.splitByCharacterType("ab de fg")));
assertTrue(Objects.deepEquals(new String[]{"ab", " ", "de", " ",
"fg"}, StringUtils.splitByCharacterType("ab de fg")));
assertTrue(Objects.deepEquals(new String[]{"ab", ":", "cd", ":",
"ef"}, StringUtils.splitByCharacterType("ab:cd:ef")));
assertTrue(Objects.deepEquals(new String[]{"number", "5"},
StringUtils.splitByCharacterType("number5")));
assertTrue(Objects.deepEquals(new String[]{"foo", "B", "ar"},
StringUtils.splitByCharacterType("fooBar")));
assertTrue(Objects.deepEquals(new String[]{"foo", "200", "B", "ar"},
StringUtils.splitByCharacterType("foo200Bar")));
assertTrue(Objects.deepEquals(new String[]{"ASFR", "ules"},
StringUtils.splitByCharacterType("ASFRules")));
}
@Test
void testSplitByCharacterTypeCamelCase() {
assertNull(StringUtils.splitByCharacterTypeCamelCase(null));
assertEquals(0, StringUtils.splitByCharacterTypeCamelCase("").length);
assertTrue(Objects.deepEquals(new String[]{"ab", " ", "de", " ",
"fg"}, StringUtils.splitByCharacterTypeCamelCase("ab de fg")));
assertTrue(Objects.deepEquals(new String[]{"ab", " ", "de", " ",
"fg"}, StringUtils.splitByCharacterTypeCamelCase("ab de fg")));
assertTrue(Objects.deepEquals(new String[]{"ab", ":", "cd", ":",
"ef"}, StringUtils.splitByCharacterTypeCamelCase("ab:cd:ef")));
assertTrue(Objects.deepEquals(new String[]{"number", "5"},
StringUtils.splitByCharacterTypeCamelCase("number5")));
assertTrue(Objects.deepEquals(new String[]{"foo", "Bar"},
StringUtils.splitByCharacterTypeCamelCase("fooBar")));
assertTrue(Objects.deepEquals(new String[]{"foo", "200", "Bar"},
StringUtils.splitByCharacterTypeCamelCase("foo200Bar")));
assertTrue(Objects.deepEquals(new String[]{"ASF", "Rules"},
StringUtils.splitByCharacterTypeCamelCase("ASFRules")));
}
@Test
void testSplitByWholeSeparatorPreserveAllTokens_StringString() {
assertArrayEquals(null, StringUtils.splitByWholeSeparatorPreserveAllTokens(null, "."));
assertEquals(0, StringUtils.splitByWholeSeparatorPreserveAllTokens("", ".").length);
// test whitespace
String input = "ab de fg";
String[] expected = {"ab", "", "", "de", "fg"};
String[] actual = StringUtils.splitByWholeSeparatorPreserveAllTokens(input, null);
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i += 1) {
assertEquals(expected[i], actual[i]);
}
// test delimiter singlechar
input = "1::2:::3::::4";
expected = new String[]{"1", "", "2", "", "", "3", "", "", "", "4"};
actual = StringUtils.splitByWholeSeparatorPreserveAllTokens(input, ":");
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i += 1) {
assertEquals(expected[i], actual[i]);
}
// test delimiter multichar
input = "1::2:::3::::4";
expected = new String[]{"1", "2", ":3", "", "4"};
actual = StringUtils.splitByWholeSeparatorPreserveAllTokens(input, "::");
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i += 1) {
assertEquals(expected[i], actual[i]);
}
}
@Test
void testSplitByWholeSeparatorPreserveAllTokens_StringStringInt() {
assertArrayEquals(null, StringUtils.splitByWholeSeparatorPreserveAllTokens(null, ".", -1));
assertEquals(0, StringUtils.splitByWholeSeparatorPreserveAllTokens("", ".", -1).length);
// test whitespace
String input = "ab de fg";
String[] expected = {"ab", "", "", "de", "fg"};
String[] actual = StringUtils.splitByWholeSeparatorPreserveAllTokens(input, null, -1);
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i += 1) {
assertEquals(expected[i], actual[i]);
}
// test delimiter singlechar
input = "1::2:::3::::4";
expected = new String[]{"1", "", "2", "", "", "3", "", "", "", "4"};
actual = StringUtils.splitByWholeSeparatorPreserveAllTokens(input, ":", -1);
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i += 1) {
assertEquals(expected[i], actual[i]);
}
// test delimiter multichar
input = "1::2:::3::::4";
expected = new String[]{"1", "2", ":3", "", "4"};
actual = StringUtils.splitByWholeSeparatorPreserveAllTokens(input, "::", -1);
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i += 1) {
assertEquals(expected[i], actual[i]);
}
// test delimiter char with max
input = "1::2::3:4";
expected = new String[]{"1", "", "2", ":3:4"};
actual = StringUtils.splitByWholeSeparatorPreserveAllTokens(input, ":", 4);
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i += 1) {
assertEquals(expected[i], actual[i]);
}
}
@Test
void testSplitByWholeString_StringStringBoolean() {
assertArrayEquals(null, StringUtils.splitByWholeSeparator(null, "."));
assertEquals(0, StringUtils.splitByWholeSeparator("", ".").length);
final String stringToSplitOnNulls = "ab de fg";
final String[] splitOnNullExpectedResults = {"ab", "de", "fg"};
final String[] splitOnNullResults = StringUtils.splitByWholeSeparator(stringToSplitOnNulls, null);
assertEquals(splitOnNullExpectedResults.length, splitOnNullResults.length);
for (int i = 0; i < splitOnNullExpectedResults.length; i += 1) {
assertEquals(splitOnNullExpectedResults[i], splitOnNullResults[i]);
}
final String stringToSplitOnCharactersAndString = "abstemiouslyaeiouyabstemiously";
final String[] splitOnStringExpectedResults = {"abstemiously", "abstemiously"};
final String[] splitOnStringResults = StringUtils.splitByWholeSeparator(stringToSplitOnCharactersAndString, "aeiouy");
assertEquals(splitOnStringExpectedResults.length, splitOnStringResults.length);
for (int i = 0; i < splitOnStringExpectedResults.length; i += 1) {
assertEquals(splitOnStringExpectedResults[i], splitOnStringResults[i]);
}
final String[] splitWithMultipleSeparatorExpectedResults = {"ab", "cd", "ef"};
final String[] splitWithMultipleSeparator = StringUtils.splitByWholeSeparator("ab:cd::ef", ":");
assertEquals(splitWithMultipleSeparatorExpectedResults.length, splitWithMultipleSeparator.length);
for (int i = 0; i < splitWithMultipleSeparatorExpectedResults.length; i++) {
assertEquals(splitWithMultipleSeparatorExpectedResults[i], splitWithMultipleSeparator[i]);
}
}
@Test
void testSplitByWholeString_StringStringBooleanInt() {
assertArrayEquals(null, StringUtils.splitByWholeSeparator(null, ".", 3));
assertEquals(0, StringUtils.splitByWholeSeparator("", ".", 3).length);
final String stringToSplitOnNulls = "ab de fg";
final String[] splitOnNullExpectedResults = {"ab", "de fg"};
//String[] splitOnNullExpectedResults = { "ab", "de" } ;
final String[] splitOnNullResults = StringUtils.splitByWholeSeparator(stringToSplitOnNulls, null, 2);
assertEquals(splitOnNullExpectedResults.length, splitOnNullResults.length);
for (int i = 0; i < splitOnNullExpectedResults.length; i += 1) {
assertEquals(splitOnNullExpectedResults[i], splitOnNullResults[i]);
}
final String stringToSplitOnCharactersAndString = "abstemiouslyaeiouyabstemiouslyaeiouyabstemiously";
final String[] splitOnStringExpectedResults = {"abstemiously", "abstemiouslyaeiouyabstemiously"};
//String[] splitOnStringExpectedResults = { "abstemiously", "abstemiously" } ;
final String[] splitOnStringResults = StringUtils.splitByWholeSeparator(stringToSplitOnCharactersAndString, "aeiouy", 2);
assertEquals(splitOnStringExpectedResults.length, splitOnStringResults.length);
for (int i = 0; i < splitOnStringExpectedResults.length; i++) {
assertEquals(splitOnStringExpectedResults[i], splitOnStringResults[i]);
}
}
@Test
void testSplitPreserveAllTokens_String() {
assertNull(StringUtils.splitPreserveAllTokens(null));
assertEquals(0, StringUtils.splitPreserveAllTokens("").length);
String str = "abc def";
String[] res = StringUtils.splitPreserveAllTokens(str);
assertEquals(2, res.length);
assertEquals("abc", res[0]);
assertEquals("def", res[1]);
str = "abc def";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(3, res.length);
assertEquals("abc", res[0]);
assertEquals("", res[1]);
assertEquals("def", res[2]);
str = " abc ";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(3, res.length);
assertEquals("", res[0]);
assertEquals("abc", res[1]);
assertEquals("", res[2]);
str = "a b .c";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(3, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals(".c", res[2]);
str = " a b .c";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(4, res.length);
assertEquals("", res[0]);
assertEquals("a", res[1]);
assertEquals("b", res[2]);
assertEquals(".c", res[3]);
str = "a b .c";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(5, res.length);
assertEquals("a", res[0]);
assertEquals("", res[1]);
assertEquals("b", res[2]);
assertEquals("", res[3]);
assertEquals(".c", res[4]);
str = " a ";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(4, res.length);
assertEquals("", res[0]);
assertEquals("a", res[1]);
assertEquals("", res[2]);
assertEquals("", res[3]);
str = " a b";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(4, res.length);
assertEquals("", res[0]);
assertEquals("a", res[1]);
assertEquals("", res[2]);
assertEquals("b", res[3]);
str = "a" + WHITESPACE + "b" + NON_WHITESPACE + "c";
res = StringUtils.splitPreserveAllTokens(str);
assertEquals(WHITESPACE.length() + 1, res.length);
assertEquals("a", res[0]);
for (int i = 1; i < WHITESPACE.length() - 1; i++) {
assertEquals("", res[i]);
}
assertEquals("b" + NON_WHITESPACE + "c", res[WHITESPACE.length()]);
}
@Test
void testSplitPreserveAllTokens_StringChar() {
assertNull(StringUtils.splitPreserveAllTokens(null, '.'));
assertEquals(0, StringUtils.splitPreserveAllTokens("", '.').length);
String str = "a.b. c";
String[] res = StringUtils.splitPreserveAllTokens(str, '.');
assertEquals(3, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals(" c", res[2]);
str = "a.b.. c";
res = StringUtils.splitPreserveAllTokens(str, '.');
assertEquals(4, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals("", res[2]);
assertEquals(" c", res[3]);
str = ".a.";
res = StringUtils.splitPreserveAllTokens(str, '.');
assertEquals(3, res.length);
assertEquals("", res[0]);
assertEquals("a", res[1]);
assertEquals("", res[2]);
str = ".a..";
res = StringUtils.splitPreserveAllTokens(str, '.');
assertEquals(4, res.length);
assertEquals("", res[0]);
assertEquals("a", res[1]);
assertEquals("", res[2]);
assertEquals("", res[3]);
str = "..a.";
res = StringUtils.splitPreserveAllTokens(str, '.');
assertEquals(4, res.length);
assertEquals("", res[0]);
assertEquals("", res[1]);
assertEquals("a", res[2]);
assertEquals("", res[3]);
str = "..a";
res = StringUtils.splitPreserveAllTokens(str, '.');
assertEquals(3, res.length);
assertEquals("", res[0]);
assertEquals("", res[1]);
assertEquals("a", res[2]);
str = "a b c";
res = StringUtils.splitPreserveAllTokens(str, ' ');
assertEquals(3, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals("c", res[2]);
str = "a b c";
res = StringUtils.splitPreserveAllTokens(str, ' ');
assertEquals(5, res.length);
assertEquals("a", res[0]);
assertEquals("", res[1]);
assertEquals("b", res[2]);
assertEquals("", res[3]);
assertEquals("c", res[4]);
str = " a b c";
res = StringUtils.splitPreserveAllTokens(str, ' ');
assertEquals(4, res.length);
assertEquals("", res[0]);
assertEquals("a", res[1]);
assertEquals("b", res[2]);
assertEquals("c", res[3]);
str = " a b c";
res = StringUtils.splitPreserveAllTokens(str, ' ');
assertEquals(5, res.length);
assertEquals("", res[0]);
assertEquals("", res[1]);
assertEquals("a", res[2]);
assertEquals("b", res[3]);
assertEquals("c", res[4]);
str = "a b c ";
res = StringUtils.splitPreserveAllTokens(str, ' ');
assertEquals(4, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals("c", res[2]);
assertEquals("", res[3]);
str = "a b c ";
res = StringUtils.splitPreserveAllTokens(str, ' ');
assertEquals(5, res.length);
assertEquals("a", res[0]);
assertEquals("b", res[1]);
assertEquals("c", res[2]);
assertEquals("", res[3]);
assertEquals("", res[4]);
// Match example in javadoc
{
final String[] results;
final String[] expectedResults = {"a", "", "b", "c"};
results = StringUtils.splitPreserveAllTokens("a..b.c", '.');
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
}
@Test
void testSplitPreserveAllTokens_StringString_StringStringInt() {
assertNull(StringUtils.splitPreserveAllTokens(null, "."));
assertNull(StringUtils.splitPreserveAllTokens(null, ".", 3));
assertEquals(0, StringUtils.splitPreserveAllTokens("", ".").length);
assertEquals(0, StringUtils.splitPreserveAllTokens("", ".", 3).length);
innerTestSplitPreserveAllTokens('.', ".", ' ');
innerTestSplitPreserveAllTokens('.', ".", ',');
innerTestSplitPreserveAllTokens('.', ".,", 'x');
for (int i = 0; i < WHITESPACE.length(); i++) {
for (int j = 0; j < NON_WHITESPACE.length(); j++) {
innerTestSplitPreserveAllTokens(WHITESPACE.charAt(i), null, NON_WHITESPACE.charAt(j));
innerTestSplitPreserveAllTokens(WHITESPACE.charAt(i), String.valueOf(WHITESPACE.charAt(i)), NON_WHITESPACE.charAt(j));
}
}
{
final String[] results;
final String[] expectedResults = {"ab", "de fg"};
results = StringUtils.splitPreserveAllTokens("ab de fg", null, 2);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"ab", " de fg"};
results = StringUtils.splitPreserveAllTokens("ab de fg", null, 2);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"ab", "::de:fg"};
results = StringUtils.splitPreserveAllTokens("ab:::de:fg", ":", 2);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"ab", "", " de fg"};
results = StringUtils.splitPreserveAllTokens("ab de fg", null, 3);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"ab", "", "", "de fg"};
results = StringUtils.splitPreserveAllTokens("ab de fg", null, 4);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] expectedResults = {"ab", "cd:ef"};
final String[] results;
results = StringUtils.splitPreserveAllTokens("ab:cd:ef", ":", 2);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"ab", ":cd:ef"};
results = StringUtils.splitPreserveAllTokens("ab::cd:ef", ":", 2);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"ab", "", ":cd:ef"};
results = StringUtils.splitPreserveAllTokens("ab:::cd:ef", ":", 3);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"ab", "", "", "cd:ef"};
results = StringUtils.splitPreserveAllTokens("ab:::cd:ef", ":", 4);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"", "ab", "", "", "cd:ef"};
results = StringUtils.splitPreserveAllTokens(":ab:::cd:ef", ":", 5);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
{
final String[] results;
final String[] expectedResults = {"", "", "ab", "", "", "cd:ef"};
results = StringUtils.splitPreserveAllTokens("::ab:::cd:ef", ":", 6);
assertEquals(expectedResults.length, results.length);
for (int i = 0; i < expectedResults.length; i++) {
assertEquals(expectedResults[i], results[i]);
}
}
}
// Methods on StringUtils that are immutable in spirit (i.e. calculate the length)
// should take a CharSequence parameter. Methods that are mutable in spirit (i.e. capitalize)
// should take a String or String[] parameter and return String or String[].
// This test enforces that this is done.
@Test
void testStringUtilsCharSequenceContract() {
final Class<StringUtils> c = StringUtils.class;
// Methods that are expressly excluded from testStringUtilsCharSequenceContract()
final String[] excludeMethods = {
"public static int org.apache.commons.lang3.StringUtils.compare(java.lang.String,java.lang.String)",
"public static int org.apache.commons.lang3.StringUtils.compare(java.lang.String,java.lang.String,boolean)",
"public static int org.apache.commons.lang3.StringUtils.compareIgnoreCase(java.lang.String,java.lang.String)",
"public static int org.apache.commons.lang3.StringUtils.compareIgnoreCase(java.lang.String,java.lang.String,boolean)",
"public static byte[] org.apache.commons.lang3.StringUtils.getBytes(java.lang.String,java.nio.charset.Charset)",
"public static byte[] org.apache.commons.lang3.StringUtils.getBytes(java.lang.String,java.lang.String) throws java.io.UnsupportedEncodingException"
};
final Method[] methods = c.getMethods();
for (final Method m : methods) {
final String methodStr = m.toString();
if (m.getReturnType() == String.class || m.getReturnType() == String[].class) {
// Assume this is mutable and ensure the first parameter is not CharSequence.
// It may be String or it may be something else (String[], Object, Object[]) so
// don't actively test for that.
final Class<?>[] params = m.getParameterTypes();
if (params.length > 0 && (params[0] == CharSequence.class || params[0] == CharSequence[].class)) {
assertFalse(ArrayUtils.contains(excludeMethods, methodStr), "The method \"" + methodStr + "\" appears to be mutable in spirit and therefore must not accept a CharSequence");
}
} else {
// Assume this is immutable in spirit and ensure the first parameter is not String.
// As above, it may be something other than CharSequence.
final Class<?>[] params = m.getParameterTypes();
if (params.length > 0 && (params[0] == String.class || params[0] == String[].class)) {
assertTrue(ArrayUtils.contains(excludeMethods, methodStr),
"The method \"" + methodStr + "\" appears to be immutable in spirit and therefore must not accept a String");
}
}
}
}
@Test
void testSwapCase_String() {
assertNull(StringUtils.swapCase(null));
assertEquals("", StringUtils.swapCase(""));
assertEquals(" ", StringUtils.swapCase(" "));
assertEquals("i", WordUtils.swapCase("I"));
assertEquals("I", WordUtils.swapCase("i"));
assertEquals("I AM HERE 123", StringUtils.swapCase("i am here 123"));
assertEquals("i aM hERE 123", StringUtils.swapCase("I Am Here 123"));
assertEquals("I AM here 123", StringUtils.swapCase("i am HERE 123"));
assertEquals("i am here 123", StringUtils.swapCase("I AM HERE 123"));
final String test = "This String contains a TitleCase character: \u01C8";
final String expect = "tHIS sTRING CONTAINS A tITLEcASE CHARACTER: \u01C9";
assertEquals(expect, WordUtils.swapCase(test));
assertEquals(expect, StringUtils.swapCase(test));
}
@Test
void testToCodePoints() {
final int orphanedHighSurrogate = 0xD801;
final int orphanedLowSurrogate = 0xDC00;
final int supplementary = 0x2070E;
final int[] codePoints = { 'a', orphanedHighSurrogate, 'b', 'c', supplementary, 'd', orphanedLowSurrogate, 'e' };
final String s = new String(codePoints, 0, codePoints.length);
assertArrayEquals(codePoints, StringUtils.toCodePoints(s));
assertNull(StringUtils.toCodePoints(null));
assertArrayEquals(ArrayUtils.EMPTY_INT_ARRAY, StringUtils.toCodePoints(""));
assertArrayEquals(new int[] { 'a' }, StringUtils.toCodePoints("a"));
assertArrayEquals(new int[] { 'a', 'b' }, StringUtils.toCodePoints("ab"));
assertArrayEquals(new int[] { 'a', 'b', 'c' }, StringUtils.toCodePoints("abc"));
}
@Test
void testToCodePointsEmoji() {
assertArrayEquals(ArrayFill.fill(new int[14], 129418), StringUtils.toCodePoints("��������������������������������������������������������"));
assertArrayEquals(new int[] { 128105, 127995, 8205, 128104, 127995, 8205, 128102, 127995, 8205, 128102, 127995, 128105, 127996, 8205, 128104, 127996,
8205, 128102, 127996, 8205, 128102, 127996, 128105, 127997, 8205, 128104, 127997, 8205, 128102, 127997, 8205, 128102, 127997, 128105, 127998,
8205, 128104, 127998, 8205, 128102, 127998, 8205, 128102, 127998, 128105, 127999, 8205, 128104, 127999, 8205, 128102, 127999, 8205, 128102,
127999, 128105, 127995, 8205, 128104, 127995, 8205, 128102, 127995, 8205, 128102, 127995, 128105, 127996, 8205, 128104, 127996, 8205, 128102,
127996, 8205, 128102, 127996, 128105, 127997, 8205, 128104, 127997, 8205, 128102, 127997, 8205, 128102, 127997, 128105, 127998, 8205, 128104,
127998, 8205, 128102, 127998, 8205, 128102, 127998, 128105, 127999, 8205, 128104, 127999, 8205, 128102, 127999, 8205, 128102, 127999 },
StringUtils.toCodePoints(
"��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������"));
}
/**
* Tests {@link StringUtils#toEncodedString(byte[], Charset)}
*
* @see StringUtils#toEncodedString(byte[], Charset)
*/
@Test
void testToEncodedString() {
final String expectedString = "The quick brown fox jumps over the lazy dog.";
String encoding = SystemUtils.FILE_ENCODING;
byte[] expectedBytes = expectedString.getBytes(Charset.defaultCharset());
// sanity check start
assertArrayEquals(expectedBytes, expectedString.getBytes());
// sanity check end
assertEquals(expectedString, StringUtils.toEncodedString(expectedBytes, Charset.defaultCharset()));
assertEquals(expectedString, StringUtils.toEncodedString(expectedBytes, Charset.forName(encoding)));
encoding = StandardCharsets.UTF_16.name();
expectedBytes = expectedString.getBytes(Charset.forName(encoding));
assertEquals(expectedString, StringUtils.toEncodedString(expectedBytes, Charset.forName(encoding)));
}
@Test
@ReadsDefaultLocale
@WritesDefaultLocale
void testToRootLowerCase() {
assertNull(StringUtils.toRootLowerCase(null));
assertEquals("a", StringUtils.toRootLowerCase("A"));
assertEquals("a", StringUtils.toRootLowerCase("a"));
final Locale TURKISH = Locale.forLanguageTag("tr");
// Sanity checks:
assertNotEquals("title", "TITLE".toLowerCase(TURKISH));
assertEquals("title", "TITLE".toLowerCase(Locale.ROOT));
assertEquals("title", StringUtils.toRootLowerCase("TITLE"));
}
@Test
@DefaultLocale("tr")
@ReadsDefaultLocale
void testToRootLowerCaseTurkish() {
assertEquals("title", StringUtils.toRootLowerCase("TITLE"));
}
@Test
@ReadsDefaultLocale
@WritesDefaultLocale
void testToRootUpperCase() {
assertNull(StringUtils.toRootUpperCase(null));
assertEquals("A", StringUtils.toRootUpperCase("a"));
assertEquals("A", StringUtils.toRootUpperCase("A"));
final Locale TURKISH = Locale.forLanguageTag("tr");
// Sanity checks:
assertNotEquals("TITLE", "title".toUpperCase(TURKISH));
assertEquals("TITLE", "title".toUpperCase(Locale.ROOT));
assertEquals("TITLE", StringUtils.toRootUpperCase("title"));
// Make sure we are not using the default Locale:
final Locale defaultLocale = Locale.getDefault();
try {
Locale.setDefault(TURKISH);
assertEquals("TITLE", StringUtils.toRootUpperCase("title"));
} finally {
Locale.setDefault(defaultLocale);
}
}
/**
* Tests {@link StringUtils#toString(byte[], String)}
*
* @throws java.io.UnsupportedEncodingException because the method under test max throw it
* @see StringUtils#toString(byte[], String)
*/
@Test
void testToString() throws UnsupportedEncodingException {
final String expectedString = "The quick brown fox jumps over the lazy dog.";
byte[] expectedBytes = expectedString.getBytes(Charset.defaultCharset());
// sanity check start
assertArrayEquals(expectedBytes, expectedString.getBytes());
// sanity check end
assertEquals(expectedString, StringUtils.toString(expectedBytes, null));
assertEquals(expectedString, StringUtils.toString(expectedBytes, SystemUtils.FILE_ENCODING));
final String encoding = StandardCharsets.UTF_16.name();
expectedBytes = expectedString.getBytes(Charset.forName(encoding));
assertEquals(expectedString, StringUtils.toString(expectedBytes, encoding));
}
@Test
void testTruncate_StringInt() {
assertNull(StringUtils.truncate(null, 12));
assertIllegalArgumentException(() -> StringUtils.truncate(null, -1), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate(null, -10), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate(null, Integer.MIN_VALUE), "maxWith cannot be negative");
assertEquals("", StringUtils.truncate("", 10));
assertEquals("abc", StringUtils.truncate("abcdefghij", 3));
assertEquals("abcdef", StringUtils.truncate("abcdefghij", 6));
assertEquals("", StringUtils.truncate("abcdefghij", 0));
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -1), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -100), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", Integer.MIN_VALUE), "maxWith cannot be negative");
assertEquals("abcdefghij", StringUtils.truncate("abcdefghijklmno", 10));
assertEquals("abcdefghijklmno", StringUtils.truncate("abcdefghijklmno", Integer.MAX_VALUE));
assertEquals("abcde", StringUtils.truncate("abcdefghijklmno", 5));
assertEquals("abc", StringUtils.truncate("abcdefghijklmno", 3));
}
@Test
void testTruncate_StringIntInt() {
assertNull(StringUtils.truncate(null, 0, 12));
assertIllegalArgumentException(() -> StringUtils.truncate(null, -1, 0), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate(null, -10, -4), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate(null, Integer.MIN_VALUE, Integer.MIN_VALUE), "offset cannot be negative");
assertNull(StringUtils.truncate(null, 10, 12));
assertEquals("", StringUtils.truncate("", 0, 10));
assertEquals("", StringUtils.truncate("", 2, 10));
assertEquals("abc", StringUtils.truncate("abcdefghij", 0, 3));
assertEquals("fghij", StringUtils.truncate("abcdefghij", 5, 6));
assertEquals("", StringUtils.truncate("abcdefghij", 0, 0));
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", 0, -1), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", 0, -10), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", 0, -100), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", 1, -100), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", 0, Integer.MIN_VALUE), "maxWith cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -1, 0), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -10, 0), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -100, 1), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", Integer.MIN_VALUE, 0), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -1, -1), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -10, -10), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", -100, -100), "offset cannot be negative");
assertIllegalArgumentException(() -> StringUtils.truncate("abcdefghij", Integer.MIN_VALUE, Integer.MIN_VALUE),
"offset cannot be negative");
final String raspberry = "raspberry peach";
assertEquals("peach", StringUtils.truncate(raspberry, 10, 15));
assertEquals("abcdefghij", StringUtils.truncate("abcdefghijklmno", 0, 10));
assertEquals("abcdefghijklmno", StringUtils.truncate("abcdefghijklmno", 0, Integer.MAX_VALUE));
assertEquals("bcdefghijk", StringUtils.truncate("abcdefghijklmno", 1, 10));
assertEquals("cdefghijkl", StringUtils.truncate("abcdefghijklmno", 2, 10));
assertEquals("defghijklm", StringUtils.truncate("abcdefghijklmno", 3, 10));
assertEquals("efghijklmn", StringUtils.truncate("abcdefghijklmno", 4, 10));
assertEquals("fghijklmno", StringUtils.truncate("abcdefghijklmno", 5, 10));
assertEquals("fghij", StringUtils.truncate("abcdefghijklmno", 5, 5));
assertEquals("fgh", StringUtils.truncate("abcdefghijklmno", 5, 3));
assertEquals("klm", StringUtils.truncate("abcdefghijklmno", 10, 3));
assertEquals("klmno", StringUtils.truncate("abcdefghijklmno", 10, Integer.MAX_VALUE));
assertEquals("n", StringUtils.truncate("abcdefghijklmno", 13, 1));
assertEquals("no", StringUtils.truncate("abcdefghijklmno", 13, Integer.MAX_VALUE));
assertEquals("o", StringUtils.truncate("abcdefghijklmno", 14, 1));
assertEquals("o", StringUtils.truncate("abcdefghijklmno", 14, Integer.MAX_VALUE));
assertEquals("", StringUtils.truncate("abcdefghijklmno", 15, 1));
assertEquals("", StringUtils.truncate("abcdefghijklmno", 15, Integer.MAX_VALUE));
assertEquals("", StringUtils.truncate("abcdefghijklmno", Integer.MAX_VALUE, Integer.MAX_VALUE));
}
@Test
void testUnCapitalize() {
assertNull(StringUtils.uncapitalize(null));
assertEquals(FOO_UNCAP, StringUtils.uncapitalize(FOO_CAP), "uncapitalize(String) failed");
assertEquals(FOO_UNCAP, StringUtils.uncapitalize(FOO_UNCAP), "uncapitalize(string) failed");
assertEquals("", StringUtils.uncapitalize(""), "uncapitalize(empty-string) failed");
assertEquals("x", StringUtils.uncapitalize("X"), "uncapitalize(single-char-string) failed");
// Examples from uncapitalize Javadoc
assertEquals("cat", StringUtils.uncapitalize("cat"));
assertEquals("cat", StringUtils.uncapitalize("Cat"));
assertEquals("cAT", StringUtils.uncapitalize("CAT"));
}
@Test
void testUnescapeSurrogatePairs() {
assertEquals("\uD83D\uDE30", StringEscapeUtils.unescapeCsv("\uD83D\uDE30"));
// Examples from https://en.wikipedia.org/wiki/UTF-16
assertEquals("\uD800\uDC00", StringEscapeUtils.unescapeCsv("\uD800\uDC00"));
assertEquals("\uD834\uDD1E", StringEscapeUtils.unescapeCsv("\uD834\uDD1E"));
assertEquals("\uDBFF\uDFFD", StringEscapeUtils.unescapeCsv("\uDBFF\uDFFD"));
assertEquals("\uDBFF\uDFFD", StringEscapeUtils.unescapeHtml3("\uDBFF\uDFFD"));
assertEquals("\uDBFF\uDFFD", StringEscapeUtils.unescapeHtml4("\uDBFF\uDFFD"));
}
@Test
void testUnwrap_StringChar() {
assertNull(StringUtils.unwrap(null, null));
assertNull(StringUtils.unwrap(null, CharUtils.NUL));
assertNull(StringUtils.unwrap(null, '1'));
assertEquals("abc", StringUtils.unwrap("abc", null));
assertEquals("a", StringUtils.unwrap("a", "a"));
assertEquals("", StringUtils.unwrap("aa", "a"));
assertEquals("abc", StringUtils.unwrap("\'abc\'", '\''));
assertEquals("abc", StringUtils.unwrap("AabcA", 'A'));
assertEquals("AabcA", StringUtils.unwrap("AAabcAA", 'A'));
assertEquals("abc", StringUtils.unwrap("abc", 'b'));
assertEquals("#A", StringUtils.unwrap("#A", '#'));
assertEquals("A#", StringUtils.unwrap("A#", '#'));
assertEquals("ABA", StringUtils.unwrap("AABAA", 'A'));
}
@Test
void testUnwrap_StringString() {
assertNull(StringUtils.unwrap(null, null));
assertNull(StringUtils.unwrap(null, ""));
assertNull(StringUtils.unwrap(null, "1"));
assertEquals("abc", StringUtils.unwrap("abc", null));
assertEquals("abc", StringUtils.unwrap("abc", ""));
assertEquals("a", StringUtils.unwrap("a", "a"));
assertEquals("ababa", StringUtils.unwrap("ababa", "aba"));
assertEquals("", StringUtils.unwrap("aa", "a"));
assertEquals("abc", StringUtils.unwrap("\'abc\'", "\'"));
assertEquals("abc", StringUtils.unwrap("\"abc\"", "\""));
assertEquals("abc\"xyz", StringUtils.unwrap("\"abc\"xyz\"", "\""));
assertEquals("abc\"xyz\"", StringUtils.unwrap("\"abc\"xyz\"\"", "\""));
assertEquals("abc\'xyz\'", StringUtils.unwrap("\"abc\'xyz\'\"", "\""));
assertEquals("\"abc\'xyz\'\"", StringUtils.unwrap("AA\"abc\'xyz\'\"AA", "AA"));
assertEquals("\"abc\'xyz\'\"", StringUtils.unwrap("123\"abc\'xyz\'\"123", "123"));
assertEquals("AA\"abc\'xyz\'\"", StringUtils.unwrap("AA\"abc\'xyz\'\"", "AA"));
assertEquals("AA\"abc\'xyz\'\"AA", StringUtils.unwrap("AAA\"abc\'xyz\'\"AAA", "A"));
assertEquals("\"abc\'xyz\'\"AA", StringUtils.unwrap("\"abc\'xyz\'\"AA", "AA"));
}
@Test
void testUpperCase() {
assertNull(StringUtils.upperCase(null));
assertNull(StringUtils.upperCase(null, Locale.ENGLISH));
assertEquals("FOO TEST THING", StringUtils.upperCase("fOo test THING"), "upperCase(String) failed");
assertEquals("", StringUtils.upperCase(""), "upperCase(empty-string) failed");
assertEquals("FOO TEST THING", StringUtils.upperCase("fOo test THING", Locale.ENGLISH),
"upperCase(String, Locale) failed");
assertEquals("", StringUtils.upperCase("", Locale.ENGLISH),
"upperCase(empty-string, Locale) failed");
}
@Test
void testWrap_StringChar() {
assertNull(StringUtils.wrap(null, CharUtils.NUL));
assertNull(StringUtils.wrap(null, '1'));
assertEquals("", StringUtils.wrap("", CharUtils.NUL));
assertEquals("xabx", StringUtils.wrap("ab", 'x'));
assertEquals("\"ab\"", StringUtils.wrap("ab", '\"'));
assertEquals("\"\"ab\"\"", StringUtils.wrap("\"ab\"", '\"'));
assertEquals("'ab'", StringUtils.wrap("ab", '\''));
assertEquals("''abcd''", StringUtils.wrap("'abcd'", '\''));
assertEquals("'\"abcd\"'", StringUtils.wrap("\"abcd\"", '\''));
assertEquals("\"'abcd'\"", StringUtils.wrap("'abcd'", '\"'));
}
@Test
void testWrap_StringString() {
assertNull(StringUtils.wrap(null, null));
assertNull(StringUtils.wrap(null, ""));
assertNull(StringUtils.wrap(null, "1"));
assertNull(StringUtils.wrap(null, null));
assertEquals("", StringUtils.wrap("", ""));
assertEquals("ab", StringUtils.wrap("ab", null));
assertEquals("xabx", StringUtils.wrap("ab", "x"));
assertEquals("\"ab\"", StringUtils.wrap("ab", "\""));
assertEquals("\"\"ab\"\"", StringUtils.wrap("\"ab\"", "\""));
assertEquals("'ab'", StringUtils.wrap("ab", "'"));
assertEquals("''abcd''", StringUtils.wrap("'abcd'", "'"));
assertEquals("'\"abcd\"'", StringUtils.wrap("\"abcd\"", "'"));
assertEquals("\"'abcd'\"", StringUtils.wrap("'abcd'", "\""));
}
@Test
void testWrapIfMissing_StringChar() {
assertNull(StringUtils.wrapIfMissing(null, CharUtils.NUL));
assertNull(StringUtils.wrapIfMissing(null, '1'));
assertEquals("", StringUtils.wrapIfMissing("", CharUtils.NUL));
assertEquals("xabx", StringUtils.wrapIfMissing("ab", 'x'));
assertEquals("\"ab\"", StringUtils.wrapIfMissing("ab", '\"'));
assertEquals("\"ab\"", StringUtils.wrapIfMissing("\"ab\"", '\"'));
assertEquals("'ab'", StringUtils.wrapIfMissing("ab", '\''));
assertEquals("'abcd'", StringUtils.wrapIfMissing("'abcd'", '\''));
assertEquals("'\"abcd\"'", StringUtils.wrapIfMissing("\"abcd\"", '\''));
assertEquals("\"'abcd'\"", StringUtils.wrapIfMissing("'abcd'", '\"'));
assertEquals("/x/", StringUtils.wrapIfMissing("x", '/'));
assertEquals("/x/y/z/", StringUtils.wrapIfMissing("x/y/z", '/'));
assertEquals("/x/y/z/", StringUtils.wrapIfMissing("/x/y/z", '/'));
assertEquals("/x/y/z/", StringUtils.wrapIfMissing("x/y/z/", '/'));
assertSame("/", StringUtils.wrapIfMissing("/", '/'));
assertSame("/x/", StringUtils.wrapIfMissing("/x/", '/'));
}
@Test
void testWrapIfMissing_StringString() {
assertNull(StringUtils.wrapIfMissing(null, "\0"));
assertNull(StringUtils.wrapIfMissing(null, "1"));
assertEquals("", StringUtils.wrapIfMissing("", "\0"));
assertEquals("xabx", StringUtils.wrapIfMissing("ab", "x"));
assertEquals("\"ab\"", StringUtils.wrapIfMissing("ab", "\""));
assertEquals("\"ab\"", StringUtils.wrapIfMissing("\"ab\"", "\""));
assertEquals("'ab'", StringUtils.wrapIfMissing("ab", "\'"));
assertEquals("'abcd'", StringUtils.wrapIfMissing("'abcd'", "\'"));
assertEquals("'\"abcd\"'", StringUtils.wrapIfMissing("\"abcd\"", "\'"));
assertEquals("\"'abcd'\"", StringUtils.wrapIfMissing("'abcd'", "\""));
assertEquals("/x/", StringUtils.wrapIfMissing("x", "/"));
assertEquals("/x/y/z/", StringUtils.wrapIfMissing("x/y/z", "/"));
assertEquals("/x/y/z/", StringUtils.wrapIfMissing("/x/y/z", "/"));
assertEquals("/x/y/z/", StringUtils.wrapIfMissing("x/y/z/", "/"));
assertEquals("/", StringUtils.wrapIfMissing("/", "/"));
assertEquals("ab/ab", StringUtils.wrapIfMissing("/", "ab"));
assertSame("ab/ab", StringUtils.wrapIfMissing("ab/ab", "ab"));
assertSame("//x//", StringUtils.wrapIfMissing("//x//", "//"));
}
}