ParsingTest.java
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed 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
*
* http://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.json;
import org.junit.Test;
import java.util.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class ParsingTest {
@Test
public void testParsingNoObjects() {
try {
new JSONTokener("").nextValue();
fail();
} catch (JSONException ignored) {
}
}
@Test
public void testParsingLiterals() throws JSONException {
assertParsed(Boolean.TRUE, "true");
assertParsed(Boolean.FALSE, "false");
assertParsed(JSONObject.NULL, "null");
assertParsed(JSONObject.NULL, "NULL");
assertParsed(Boolean.FALSE, "False");
assertParsed(Boolean.TRUE, "truE");
}
@Test
public void testParsingQuotedStrings() throws JSONException {
assertParsed("abc", "\"abc\"");
assertParsed("123", "\"123\"");
assertParsed("foo\nbar", "\"foo\\nbar\"");
assertParsed("foo bar", "\"foo\\u0020bar\"");
assertParsed("\"{}[]/\\:,=;#", "\"\\\"{}[]/\\\\:,=;#\"");
}
@Test
public void testParsingSingleQuotedStrings() throws JSONException {
assertParsed("abc", "'abc'");
assertParsed("123", "'123'");
assertParsed("foo\nbar", "'foo\\nbar'");
assertParsed("foo bar", "'foo\\u0020bar'");
assertParsed("\"{}[]/\\:,=;#", "'\\\"{}[]/\\\\:,=;#'");
}
@Test
public void testParsingUnquotedStrings() throws JSONException {
assertParsed("abc", "abc");
assertParsed("123abc", "123abc");
assertParsed("123e0x", "123e0x");
assertParsed("123e", "123e");
assertParsed("123ee21", "123ee21");
assertParsed("0xFFFFFFFFFFFFFFFFF", "0xFFFFFFFFFFFFFFFFF");
}
/**
* Unfortunately the original implementation attempts to figure out what
* Java number type best suits an input value.
*/
@Test
public void testParsingNumbersThatAreBestRepresentedAsLongs() throws JSONException {
assertParsed(9223372036854775807L, "9223372036854775807");
assertParsed(9223372036854775806L, "9223372036854775806");
assertParsed(-9223372036854775808L, "-9223372036854775808");
assertParsed(-9223372036854775807L, "-9223372036854775807");
}
@Test
public void testParsingNumbersThatAreBestRepresentedAsIntegers() throws JSONException {
assertParsed(0, "0");
assertParsed(5, "5");
assertParsed(-2147483648, "-2147483648");
assertParsed(2147483647, "2147483647");
}
@Test
public void testParsingNegativeZero() throws JSONException {
assertParsed(0, "-0");
}
@Test
public void testParsingIntegersWithAdditionalPrecisionYieldDoubles() throws JSONException {
assertParsed(1d, "1.00");
assertParsed(1d, "1.0");
assertParsed(0d, "0.0");
assertParsed(-0d, "-0.0");
}
@Test
public void testParsingNumbersThatAreBestRepresentedAsDoubles() throws JSONException {
assertParsed(9.223372036854776E18, "9223372036854775808");
assertParsed(-9.223372036854776E18, "-9223372036854775809");
assertParsed(1.7976931348623157E308, "1.7976931348623157e308");
assertParsed(2.2250738585072014E-308, "2.2250738585072014E-308");
assertParsed(4.9E-324, "4.9E-324");
assertParsed(4.9E-324, "4.9e-324");
}
@Test
public void testParsingOctalNumbers() throws JSONException {
assertParsed(5, "05");
assertParsed(8, "010");
assertParsed(1046, "02026");
}
@Test
public void testParsingHexNumbers() throws JSONException {
assertParsed(5, "0x5");
assertParsed(16, "0x10");
assertParsed(8230, "0x2026");
assertParsed(180150010, "0xABCDEFA");
assertParsed(2077093803, "0x7BCDEFAB");
}
@Test
public void testParsingLargeHexValues() throws JSONException {
assertParsed(Integer.MAX_VALUE, "0x7FFFFFFF");
String message = "Hex values are parsed as Strings if their signed " +
"value is greater than Integer.MAX_VALUE.";
assertParsed(message, 0x80000000L, "0x80000000");
}
@Test
public void test64BitHexValues() throws JSONException {
// note that this is different from the same test in the original Android
// this is due to the fact that Long.parseLong doesn't correctly handle
// the value -1 expressed as unsigned hex if you use the normal JDK. Presumably
// the Android equivalent program does this better.
assertParsed("Large hex longs shouldn't yield ints or strings",
0xFFFFFFFFFFFFFFFL, "0xFFFFFFFFFFFFFFF");
}
@Test
public void testParsingWithCommentsAndWhitespace() throws JSONException {
assertParsed("baz", " // foo bar \n baz");
assertParsed("baz", " // foo bar \r baz");
assertParsed("baz", " // foo bar \r\n baz");
assertParsed("baz", " # foo bar \n baz");
assertParsed("baz", " # foo bar \r baz");
assertParsed("baz", " # foo bar \r\n baz");
assertParsed(5, " /* foo bar \n baz */ 5");
assertParsed(5, " /* foo bar \n baz */ 5 // quux");
assertParsed(5, " 5 ");
assertParsed(5, " 5 \r\n\t ");
assertParsed(5, "\r\n\t 5 ");
}
@Test
public void testParsingArrays() throws JSONException {
assertParsed(array(), "[]");
assertParsed(array(5, 6, true), "[5,6,true]");
assertParsed(array(5, 6, array()), "[5,6,[]]");
assertParsed(array(5, 6, 7), "[5;6;7]");
assertParsed(array(5, 6, 7), "[5 , 6 \t; \r\n 7\n]");
assertParsed(array(5, 6, 7, null), "[5,6,7,]");
assertParsed(array(null, null), "[,]");
assertParsed(array(5, null, null, null, 5), "[5,,,,5]");
assertParsed(array(null, 5), "[,5]");
assertParsed(array(null, null, null), "[,,]");
assertParsed(array(null, null, null, 5), "[,,,5]");
}
@Test
public void testParsingObjects() throws JSONException {
assertParsed(object("foo", 5), "{\"foo\": 5}");
assertParsed(object("foo", 5), "{foo: 5}");
assertParsed(object("foo", 5, "bar", "baz"), "{\"foo\": 5, \"bar\": \"baz\"}");
assertParsed(object("foo", 5, "bar", "baz"), "{\"foo\": 5; \"bar\": \"baz\"}");
assertParsed(object("foo", 5, "bar", "baz"), "{\"foo\"= 5; \"bar\"= \"baz\"}");
assertParsed(object("foo", 5, "bar", "baz"), "{\"foo\"=> 5; \"bar\"=> \"baz\"}");
assertParsed(object("foo", object(), "bar", array()), "{\"foo\"=> {}; \"bar\"=> []}");
assertParsed(object("foo", object("foo", array(5, 6))), "{\"foo\": {\"foo\": [5, 6]}}");
assertParsed(object("foo", object("foo", array(5, 6))), "{\"foo\":\n\t{\t \"foo\":[5,\r6]}}");
}
@Test
public void testSyntaxProblemUnterminatedObject() {
assertParseFail("{");
assertParseFail("{\"foo\"");
assertParseFail("{\"foo\":");
assertParseFail("{\"foo\":bar");
assertParseFail("{\"foo\":bar,");
assertParseFail("{\"foo\":bar,\"baz\"");
assertParseFail("{\"foo\":bar,\"baz\":");
assertParseFail("{\"foo\":bar,\"baz\":true");
assertParseFail("{\"foo\":bar,\"baz\":true,");
}
@Test
public void testSyntaxProblemEmptyString() {
assertParseFail("");
}
@Test
public void testSyntaxProblemUnterminatedArray() {
assertParseFail("[");
assertParseFail("[,");
assertParseFail("[,,");
assertParseFail("[true");
assertParseFail("[true,");
assertParseFail("[true,,");
}
@Test
public void testSyntaxProblemMalformedObject() {
assertParseFail("{:}");
assertParseFail("{\"key\":}");
assertParseFail("{:true}");
assertParseFail("{\"key\":true:}");
assertParseFail("{null:true}");
assertParseFail("{true:true}");
assertParseFail("{0xFF:true}");
}
private void assertParseFail(String malformedJson) {
try {
new JSONTokener(malformedJson).nextValue();
fail("Successfully parsed: \"" + malformedJson + "\"");
} catch (JSONException ignored) {
} catch (StackOverflowError e) {
fail("Stack overflowed on input: \"" + malformedJson + "\"");
}
}
private JSONArray array(Object... elements) {
return new JSONArray(Arrays.asList(elements));
}
private JSONObject object(Object... keyValuePairs) throws JSONException {
JSONObject result = new JSONObject();
for (int i = 0; i < keyValuePairs.length; i += 2) {
result.put((String) keyValuePairs[i], keyValuePairs[i + 1]);
}
return result;
}
private void assertParsed(String message, Object expected, String json) throws JSONException {
Object actual = new JSONTokener(json).nextValue();
actual = canonicalize(actual);
expected = canonicalize(expected);
assertEquals("For input \"" + json + "\" " + message, expected, actual);
}
private void assertParsed(Object expected, String json) throws JSONException {
assertParsed("", expected, json);
}
/**
* Since they don't implement equals or hashCode properly, this recursively
* replaces JSONObjects with an equivalent HashMap, and JSONArrays with the
* equivalent ArrayList.
*/
private Object canonicalize(Object input) throws JSONException {
if (input instanceof JSONArray) {
JSONArray array = (JSONArray) input;
List<Object> result = new ArrayList<Object>();
for (int i = 0; i < array.length(); i++) {
result.add(canonicalize(array.opt(i)));
}
return result;
} else if (input instanceof JSONObject) {
JSONObject object = (JSONObject) input;
Map<String, Object> result = new HashMap<String, Object>();
for (Iterator<?> i = object.keys(); i.hasNext(); ) {
String key = (String) i.next();
result.put(key, canonicalize(object.get(key)));
}
return result;
} else if (input == null || input.equals(JSONObject.NULL)) {
return JSONObject.NULL;
} else {
return input;
}
}
}