TestCharArrayBuffer.java
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package org.apache.hc.core5.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.charset.StandardCharsets;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
/**
* Unit tests for {@link CharArrayBuffer}.
*
*/
class TestCharArrayBuffer {
@Test
void testConstructor() {
final CharArrayBuffer buffer = new CharArrayBuffer(16);
Assertions.assertEquals(16, buffer.capacity());
Assertions.assertEquals(0, buffer.length());
Assertions.assertNotNull(buffer.array());
Assertions.assertEquals(16, buffer.array().length);
Assertions.assertThrows(IllegalArgumentException.class, () -> new CharArrayBuffer(-1));
}
@Test
void testSimpleAppend() {
final CharArrayBuffer buffer = new CharArrayBuffer(16);
Assertions.assertEquals(16, buffer.capacity());
Assertions.assertEquals(0, buffer.length());
final char[] b1 = buffer.toCharArray();
Assertions.assertNotNull(b1);
Assertions.assertEquals(0, b1.length);
Assertions.assertTrue(buffer.isEmpty());
Assertions.assertFalse(buffer.isFull());
final char[] tmp = new char[] { '1', '2', '3', '4'};
buffer.append(tmp, 0, tmp.length);
Assertions.assertEquals(16, buffer.capacity());
Assertions.assertEquals(4, buffer.length());
Assertions.assertFalse(buffer.isEmpty());
Assertions.assertFalse(buffer.isFull());
final char[] b2 = buffer.toCharArray();
Assertions.assertNotNull(b2);
Assertions.assertEquals(4, b2.length);
for (int i = 0; i < tmp.length; i++) {
Assertions.assertEquals(tmp[i], b2[i]);
Assertions.assertEquals(tmp[i], buffer.charAt(i));
}
Assertions.assertEquals("1234", buffer.toString());
buffer.clear();
Assertions.assertEquals(16, buffer.capacity());
Assertions.assertEquals(0, buffer.length());
Assertions.assertTrue(buffer.isEmpty());
Assertions.assertFalse(buffer.isFull());
}
@Test
void testExpandAppend() {
final CharArrayBuffer buffer = new CharArrayBuffer(4);
Assertions.assertEquals(4, buffer.capacity());
final char[] tmp = new char[] { '1', '2', '3', '4'};
buffer.append(tmp, 0, 2);
buffer.append(tmp, 0, 4);
buffer.append(tmp, 0, 0);
Assertions.assertEquals(8, buffer.capacity());
Assertions.assertEquals(6, buffer.length());
buffer.append(tmp, 0, 4);
Assertions.assertEquals(16, buffer.capacity());
Assertions.assertEquals(10, buffer.length());
Assertions.assertEquals("1212341234", buffer.toString());
}
@Test
void testAppendString() {
final CharArrayBuffer buffer = new CharArrayBuffer(8);
buffer.append("stuff");
buffer.append(" and more stuff");
Assertions.assertEquals("stuff and more stuff", buffer.toString());
}
@Test
void testAppendNullString() {
final CharArrayBuffer buffer = new CharArrayBuffer(8);
buffer.append((String)null);
Assertions.assertEquals("null", buffer.toString());
}
@Test
void testAppendCharArrayBuffer() {
final CharArrayBuffer buffer1 = new CharArrayBuffer(8);
buffer1.append(" and more stuff");
final CharArrayBuffer buffer2 = new CharArrayBuffer(8);
buffer2.append("stuff");
buffer2.append(buffer1);
Assertions.assertEquals("stuff and more stuff", buffer2.toString());
}
@Test
void testAppendNullCharArrayBuffer() {
final CharArrayBuffer buffer = new CharArrayBuffer(8);
buffer.append((CharArrayBuffer)null);
buffer.append((CharArrayBuffer)null, 0, 0);
Assertions.assertEquals("", buffer.toString());
}
@Test
void testAppendSingleChar() {
final CharArrayBuffer buffer = new CharArrayBuffer(4);
buffer.append('1');
buffer.append('2');
buffer.append('3');
buffer.append('4');
buffer.append('5');
buffer.append('6');
Assertions.assertEquals("123456", buffer.toString());
}
@Test
void testInvalidCharArrayAppend() {
final CharArrayBuffer buffer = new CharArrayBuffer(4);
buffer.append((char[])null, 0, 0);
final char[] tmp = new char[] { '1', '2', '3', '4'};
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, -1, 0));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 0, -1));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 0, 8));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 10, Integer.MAX_VALUE));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 2, 4));
}
@Test
void testSetLength() {
final CharArrayBuffer buffer = new CharArrayBuffer(4);
buffer.setLength(2);
Assertions.assertEquals(2, buffer.length());
}
@Test
void testSetInvalidLength() {
final CharArrayBuffer buffer = new CharArrayBuffer(4);
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.setLength(-2));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.setLength(200));
}
@Test
void testEnsureCapacity() {
final CharArrayBuffer buffer = new CharArrayBuffer(4);
buffer.ensureCapacity(2);
Assertions.assertEquals(4, buffer.capacity());
buffer.ensureCapacity(8);
Assertions.assertEquals(8, buffer.capacity());
}
@Test
void testIndexOf() {
final CharArrayBuffer buffer = new CharArrayBuffer(16);
buffer.append("name: value");
Assertions.assertEquals(4, buffer.indexOf(':'));
Assertions.assertEquals(-1, buffer.indexOf(','));
Assertions.assertEquals(4, buffer.indexOf(':', -1, 11));
Assertions.assertEquals(4, buffer.indexOf(':', 0, 1000));
Assertions.assertEquals(-1, buffer.indexOf(':', 2, 1));
}
@Test
void testSubstring() {
final CharArrayBuffer buffer = new CharArrayBuffer(16);
buffer.append(" name: value ");
Assertions.assertEquals(5, buffer.indexOf(':'));
Assertions.assertEquals(" name", buffer.substring(0, 5));
Assertions.assertEquals(" value ", buffer.substring(6, buffer.length()));
Assertions.assertEquals("name", buffer.substringTrimmed(0, 5));
Assertions.assertEquals("value", buffer.substringTrimmed(6, buffer.length()));
Assertions.assertEquals("", buffer.substringTrimmed(13, buffer.length()));
}
@Test
void testSubstringIndexOfOutBound() {
final CharArrayBuffer buffer = new CharArrayBuffer(16);
buffer.append("stuff");
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.substring(-2, 10));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.substringTrimmed(-2, 10));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.substring(12, 10));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.substringTrimmed(12, 10));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.substring(2, 1));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.substringTrimmed(2, 1));
}
@Test
void testAppendAsciiByteArray() {
final String s1 = "stuff";
final String s2 = " and more stuff";
final byte[] b1 = s1.getBytes(StandardCharsets.US_ASCII);
final byte[] b2 = s2.getBytes(StandardCharsets.US_ASCII);
final CharArrayBuffer buffer = new CharArrayBuffer(8);
buffer.append(b1, 0, b1.length);
buffer.append(b2, 0, b2.length);
Assertions.assertEquals("stuff and more stuff", buffer.toString());
}
@Test
void testAppendISOByteArray() {
final byte[] b = new byte[] {0x00, 0x20, 0x7F, -0x80, -0x01};
final CharArrayBuffer buffer = new CharArrayBuffer(8);
buffer.append(b, 0, b.length);
final char[] ch = buffer.toCharArray();
Assertions.assertNotNull(ch);
Assertions.assertEquals(5, ch.length);
Assertions.assertEquals(0x00, ch[0]);
Assertions.assertEquals(0x20, ch[1]);
Assertions.assertEquals(0x7F, ch[2]);
Assertions.assertEquals(0x80, ch[3]);
Assertions.assertEquals(0xFF, ch[4]);
}
@Test
void testAppendNullByteArray() {
final CharArrayBuffer buffer = new CharArrayBuffer(8);
buffer.append((byte[])null, 0, 0);
Assertions.assertEquals("", buffer.toString());
}
@Test
void testAppendNullByteArrayBuffer() {
final CharArrayBuffer buffer = new CharArrayBuffer(8);
buffer.append((ByteArrayBuffer)null, 0, 0);
Assertions.assertEquals("", buffer.toString());
}
@Test
void testInvalidAppendAsciiByteArray() {
final CharArrayBuffer buffer = new CharArrayBuffer(4);
buffer.append((byte[])null, 0, 0);
final byte[] tmp = new byte[] { '1', '2', '3', '4'};
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, -1, 0));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 0, -1));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 0, 8));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 10, Integer.MAX_VALUE));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.append(tmp, 2, 4));
}
@Test
void testSerialization() throws Exception {
final CharArrayBuffer orig = new CharArrayBuffer(32);
orig.append('a');
orig.append('b');
orig.append('c');
final ByteArrayOutputStream outbuffer = new ByteArrayOutputStream();
try (final ObjectOutputStream outStream = new ObjectOutputStream(outbuffer)) {
outStream.writeObject(orig);
}
final byte[] raw = outbuffer.toByteArray();
final ByteArrayInputStream inBuffer = new ByteArrayInputStream(raw);
final ObjectInputStream inStream = new ObjectInputStream(inBuffer);
final CharArrayBuffer clone = (CharArrayBuffer) inStream.readObject();
Assertions.assertEquals(orig.capacity(), clone.capacity());
Assertions.assertEquals(orig.length(), clone.length());
final char[] data = clone.toCharArray();
Assertions.assertNotNull(data);
Assertions.assertEquals(3, data.length);
Assertions.assertEquals('a', data[0]);
Assertions.assertEquals('b', data[1]);
Assertions.assertEquals('c', data[2]);
}
@Test
void testSubSequence() {
final CharArrayBuffer buffer = new CharArrayBuffer(16);
buffer.append(" name: value ");
Assertions.assertEquals(5, buffer.indexOf(':'));
Assertions.assertEquals(" name", buffer.subSequence(0, 5).toString());
Assertions.assertEquals(" value ",
buffer.subSequence(6, buffer.length()).toString());
}
@Test
void testSubSequenceIndexOfOutBound() {
final CharArrayBuffer buffer = new CharArrayBuffer(16);
buffer.append("stuff");
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.subSequence(-2, 10));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.subSequence(12, 10));
Assertions.assertThrows(IndexOutOfBoundsException.class, () -> buffer.subSequence(2, 1));
}
}