Implement strict mode for JSONObject

[stleary]

Strict mode now works for JSONArray (see #877), but not for JSONObject or for JSONArrays embedded in JSONObjects.
For example, the following code parses without error:

        String str = "{\"a\": [b]}";
        JSONObject jsonObject = new JSONObject(str, new JSONParserConfiguration().withStrictMode(true));

Several additional changes should be included with the PR:

• The indentation in nextString(char, boolean) is incorrect.
• There is a compiler warning in JSONTokener that should be fixed: (fixed in add javadoc for strictmode #886)

Warning:  Javadoc Warnings
Warning:  /home/runner/work/JSON-java/JSON-java/src/main/java/org/json/JSONTokener.java:294: warning: no @param for strictMode
Warning:  public String nextString(char quote, boolean strictMode) throws JSONException {
Warning:  ^
Warning: [WARNING] 1 warning

[rikkarth]

No longer applies. As of latest merge #888

    @Test
    public void test(){
        String str = "{\"a\": [b]}";
        JSONObject jsonObject = new JSONObject(str, new JSONParserConfiguration().withStrictMode(true));
    }

output

org.json.JSONException: Value 'b' is not surrounded by quotes at 8 [character 9 line 1]

	at org.json.JSONTokener.syntaxError(JSONTokener.java:624)
	at org.json.JSONTokener.getValidNumberBooleanOrNullFromObject(JSONTokener.java:577)
	at org.json.JSONTokener.parsedUnquotedText(JSONTokener.java:569)
	at org.json.JSONTokener.nextSimpleValue(JSONTokener.java:539)
	at org.json.JSONTokener.nextValue(JSONTokener.java:483)
	at org.json.JSONArray.parseTokener(JSONArray.java:161)
	at org.json.JSONArray.<init>(JSONArray.java:106)
	at org.json.JSONTokener.nextValue(JSONTokener.java:478)
	at org.json.JSONObject.<init>(JSONObject.java:247)
	at org.json.JSONObject.<init>(JSONObject.java:453)
	at org.json.junit.JSONObjectTest.test(JSONObjectTest.java:3852)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
	at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:232)
	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55)


Process finished with exit code -1

[stleary]

@rikkarth, Try this code:

    @Test
    public void foo() {
        JSONObject jsonObject = new JSONObject("{}abc", new JSONParserConfiguration().withStrictMode(true));
        JSONArray jsonArray = new JSONArray("[]abc", new JSONParserConfiguration().withStrictMode(true));
    }

The first test passes, but should not. The second test correctly detects the invalid chars at the end of the input. This happened because no work was done to implement invalid trailing char checking for JSONObject. We don't know whether other tests may fail because there are no unit tests for top level JSONObjects in strict mode.

[rikkarth]

Will address this starting next week.