Add support for parsing JSON data

sources/Data/JSON/JArray.uc

@@ -533,6 +533,53 @@ public function JSON Clone()
     return clonedArray;
 }
 
+public function bool ParseIntoSelfWith(Parser parser)
+{
+    local int                   i;
+    local bool                  parsingSucceeded;
+    local Parser.ParserState    initState;
+    local JStorageAtom          nextAtom;
+    local array<JStorageAtom>   parsedAtoms;
+    if (parser == none) return false;
+    initState = parser.GetCurrentState();
+    parser.Skip().Match("[").Confirm();
+    if (!parser.Ok())
+    {
+        parser.RestoreState(initState);
+        return false;
+    }
+    while (parser.Ok() && !parser.HasFinished())
+    {
+        parser.Skip().Confirm();
+        if (parser.Match("]").Ok()) {
+            parsingSucceeded = true;
+            break;
+        }
+        if (parsedAtoms.length > 0 && !parser.R().Match(",").Skip().Ok()) {
+            break;
+        }
+        else {
+            parser.Confirm();
+        }
+        nextAtom = ParseAtom(parser.R());
+        if (nextAtom.type == JSON_Undefined) {
+            break;
+        }
+        parsedAtoms[parsedAtoms.length] = nextAtom;
+        parser.Confirm();
+    }
+    if (parsingSucceeded)
+    {
+        for (i = 0; i < parsedAtoms.length; i += 1) {
+            data[data.length] = parsedAtoms[i];
+        }
+    }
+    else {
+        parser.RestoreState(initState);
+    }
+    return parsingSucceeded;
+}
+
 public function string DisplayWith(JSONDisplaySettings displaySettings)
 {
     local int                   i;

sources/Data/JSON/JObject.uc

@@ -529,6 +529,54 @@ public function JSON Clone()
     return clonedObject;
 }
 
+public function bool ParseIntoSelfWith(Parser parser)
+{
+    local int                   i;
+    local bool                  parsingSucceeded;
+    local Parser.ParserState    initState;
+    local JProperty             nextProperty;
+    local array<JProperty>      parsedProperties;
+    if (parser == none) return false;
+    initState = parser.GetCurrentState();
+    parser.Skip().Match("{").Confirm();
+    if (!parser.Ok())
+    {
+        parser.RestoreState(initState);
+        return false;
+    }
+    while (parser.Ok() && !parser.HasFinished())
+    {
+        parser.Skip().Confirm();
+        if (parser.Match("}").Ok()) {
+            parsingSucceeded = true;
+            break;
+        }
+        if (parsedProperties.length > 0 && !parser.R().Match(",").Skip().Ok()) {
+            break;
+        }
+        else {
+            parser.Confirm();
+        }
+        parser.R().Skip().MStringLiteral(nextProperty.name).Skip().Match(":");
+        nextProperty.value = ParseAtom(parser.Skip());
+        if (!parser.Ok() || nextProperty.value.type == JSON_Undefined) {
+            break;
+        }
+        parsedProperties[parsedProperties.length] = nextProperty;
+        parser.Confirm();
+    }
+    if (parsingSucceeded)
+    {
+        for (i = 0; i < parsedProperties.length; i += 1) {
+            UpdateProperty(parsedProperties[i]);
+        }
+    }
+    else {
+        parser.RestoreState(initState);
+    }
+    return parsingSucceeded;
+}
+
 public function string DisplayWith(JSONDisplaySettings displaySettings)
 {
     local int                   i, j;

sources/Data/JSON/JSON.uc

@@ -58,23 +58,23 @@ struct JStorageAtom
 {
     //  What type is stored exactly?
     //  Depending on that, uses one of the other fields as a storage.
-    var protected JType         type;
-    var protected float         numberValue;
-    var protected string        stringValue;
-    var protected bool          booleanValue;
+    var JType         type;
+    var float         numberValue;
+    var string        stringValue;
+    var bool          booleanValue;
     //  Used for storing both JSON objects and arrays.
-    var protected JSON          complexValue;
+    var JSON          complexValue;
     //  Numeric value might not fit into a `float` very well, so we will store
     //  them as both `float` and `integer` and allow user to request any version
     //  of them
-    var protected int           numberValueAsInt;
-    var protected bool          preferIntegerValue;
+    var int           numberValueAsInt;
+    var bool          preferIntegerValue;
     //  Some `string` values might be actually used to represent classes,
     //  so we will give users an ability to request `string` value as a class.
-    var protected class<Object> stringValueAsClass;
+    var class<Object> stringValueAsClass;
     //  To avoid several unsuccessful attempts to load `class` object from
     //  a `string`, we will record whether we've already tied that.
-    var protected bool          classLoadingWasAttempted;
+    var bool          classLoadingWasAttempted;
 };
 
 enum JComparisonResult
@@ -101,6 +101,8 @@ struct JSONDisplaySettings
     var string  afterArrayComma;
 };
 
+var private const int MAX_FLOAT_PRECISION;
+
 public function JSON Clone()
 {
     return none;
@@ -350,6 +352,135 @@ protected final function JSONDisplaySettings IndentSettings(
     return indentedSettings;
 }
 
+public function bool ParseIntoSelfWith(Parser parser)
+{
+    return false;
+}
+
+public final function bool ParseIntoSelf(Text source)
+{
+    local bool      successfullyParsed;
+    local Parser    jsonParser;
+    jsonParser = _.text.Parse(source);
+    successfullyParsed = ParseIntoSelfWith(jsonParser);
+    _.memory.Free(jsonParser);
+    return successfullyParsed;
+}
+
+public final function bool ParseIntoSelfString(string source)
+{
+    local bool      successfullyParsed;
+    local Parser    jsonParser;
+    jsonParser = _.text.ParseString(source);
+    successfullyParsed = ParseIntoSelfWith(jsonParser);
+    _.memory.Free(jsonParser);
+    return successfullyParsed;
+}
+
+public final function bool ParseIntoSelfRaw(array<Text.Character> rawSource)
+{
+    local bool      successfullyParsed;
+    local Parser    jsonParser;
+    jsonParser = _.text.ParseRaw(rawSource);
+    successfullyParsed = ParseIntoSelfWith(jsonParser);
+    _.memory.Free(jsonParser);
+    return successfullyParsed;
+}
+
+protected final function JStorageAtom ParseAtom(Parser parser)
+{
+    local Parser.ParserState    initState;
+    local JStorageAtom          newAtom;
+    if (parser == none) return newAtom;
+    if (!parser.Ok())   return newAtom;
+    initState = parser.GetCurrentState();
+    parser.Skip().Confirm();
+    if (parser.MStringLiteral(newAtom.stringValue).Ok())
+    {
+        newAtom.type = JSON_String;
+        return newAtom;
+    }
+    newAtom = ParseLiteral(parser.R());
+    if (newAtom.type != JSON_Undefined) {
+        return newAtom;
+    }
+    newAtom = ParseComplex(parser.R());
+    if (newAtom.type != JSON_Undefined) {
+        return newAtom;
+    }
+    newAtom = ParseNumber(parser.R());
+    if (newAtom.type == JSON_Undefined) {
+        parser.RestoreState(initState);
+    }
+    return newAtom;
+}
+
+protected final function JStorageAtom ParseLiteral(Parser parser)
+{
+    local JStorageAtom newAtom;
+    if (parser.Match("null", true).Ok())
+    {
+        newAtom.type = JSON_Null;
+        return newAtom;
+    }
+    if (parser.R().Match("false", true).Ok())
+    {
+        newAtom.type = JSON_Boolean;
+        return newAtom;
+    }
+    if (parser.R().Match("true", true).Ok())
+    {
+        newAtom.type = JSON_Boolean;
+        newAtom.booleanValue = true;
+        return newAtom;
+    }
+}
+
+protected final function JStorageAtom ParseComplex(Parser parser)
+{
+    local JStorageAtom newAtom;
+    if (parser.Match("{").Ok())
+    {
+        newAtom.complexValue = _.json.NewObject();
+        newAtom.type = JSON_Object;
+    }
+    else if (parser.R().Match("[").Ok())
+    {
+        newAtom.complexValue = _.json.NewArray();
+        newAtom.type = JSON_Array;
+    }
+    if (    newAtom.complexValue != none
+        &&  newAtom.complexValue.ParseIntoSelfWith(parser.R())) {
+        return newAtom;
+    }
+    newAtom.type = JSON_Undefined;
+    newAtom.complexValue = none;
+    return newAtom;
+}
+
+protected final function JStorageAtom ParseNumber(Parser parser)
+{
+    local JStorageAtom          newAtom;
+    local Parser.ParserState    integerParsedState;
+    if (!parser.MInteger(newAtom.numberValueAsInt).Ok()) {
+        return newAtom;
+    }
+    newAtom.type        = JSON_Number;
+    integerParsedState  = parser.GetCurrentState();
+    //  For a number check if it is recorded as a float specifically.
+    //  If not - prefer integer for storage.
+    if (    parser.Match(".").Ok()
+        ||  parser.RestoreState(integerParsedState).Match("e", true).Ok())
+    {
+        parser.R().MNumber(newAtom.numberValue);
+        return newAtom;
+    }
+    parser.RestoreState(integerParsedState);
+    newAtom.numberValue         = newAtom.numberValueAsInt;
+    newAtom.preferIntegerValue  = true;
+    return newAtom;
+}
+
 defaultproperties
 {
     MAX_FLOAT_PRECISION = 4

sources/Data/JSON/JSONAPI.uc

@@ -33,6 +33,126 @@ public function JArray newArray()
     return newArray;
 }
 
+public function JObject ParseObjectWith(Parser jsonParser)
+{
+    local JObject result;
+    result = NewObject();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelfWith(jsonParser))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
+public function JObject ParseObject(Text source)
+{
+    local JObject result;
+    result = NewObject();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelf(source))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
+public function JObject ParseObjectString(string source)
+{
+    local JObject result;
+    result = NewObject();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelfString(source))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
+public function JObject ParseObjectRaw(array<Text.Character> source)
+{
+    local JObject result;
+    result = NewObject();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelfRaw(source))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
+public function JArray ParseArrayWith(Parser jsonParser)
+{
+    local JArray result;
+    result = NewArray();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelfWith(jsonParser))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
+public function JArray ParseArray(Text source)
+{
+    local JArray result;
+    result = NewArray();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelf(source))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
+public function JArray ParseArrayString(string source)
+{
+    local JArray result;
+    result = NewArray();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelfString(source))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
+public function JArray ParseArrayRaw(array<Text.Character> source)
+{
+    local JArray result;
+    result = NewArray();
+    if (result == none) {
+        return none;
+    }
+    if (!result.ParseIntoSelfRaw(source))
+    {
+        result.Destroy();
+        return none;
+    }
+    return result;
+}
+
 defaultproperties
 {
 }

sources/Data/JSON/Tests/TEST_JSON.uc

@@ -21,6 +21,8 @@
 class TEST_JSON extends TestCase
     abstract;
 
+var string preparedJObjectString;
+
 protected static function TESTS()
 {
     local JObject jsonData;
@@ -31,6 +33,7 @@ protected static function TESTS()
     Test_JSONComparison();
     Test_JSONCloning();
     Test_JSONSetComplexValues();
+    Test_JSONParsing();
 }
 
 protected static function Test_ObjectGetSetRemove()
@@ -1003,11 +1006,11 @@ protected static function JObject Prepare_FoldedObject()
 {
     local JObject testObject;
     testObject = _().json.NewObject();
-    testObject.SetNumber("some_var", 7.32);
+    testObject.SetNumber("some_var", -7.32);
     testObject.SetString("another_var", "aye!");
     testObject.CreateObject("innerObject");
     testObject.GetObject("innerObject").SetBoolean("my_bool", true)
-        .SetInteger("my_int", 9823452).CreateArray("array");
+        .SetInteger("my_int", -9823452).CreateArray("array");
     testObject.GetObject("innerObject").GetArray("array").AddClass(class'Actor')
         .AddBoolean(false).AddNull().AddObject().AddNumber(56.6);
     testObject.GetObject("innerObject").GetArray("array").GetObject(3)
@@ -1161,7 +1164,279 @@ protected static function Test_JSONSetComplexValues()
                     !=  original.GetObject("innerObject").GetArray("array"));
 }
 
+protected static function Test_JSONParsing()
+{
+    Context("Testing parsing JSON data.");
+    SubTest_JSONObjectParsingWithParser();
+    SubTest_JSONArrayParsingWithParser();
+    SubTest_JSONObjectParsingText();
+    SubTest_JSONArrayParsingText();
+    SubTest_JSONObjectParsingRaw();
+    SubTest_JSONArrayParsingRaw();
+    SubTest_JSONObjectParsingString();
+    SubTest_JSONArrayParsingString();
+
+    Issue("Complex JSON object is incorrectly parsed.");
+    Test_ExpectTrue(Prepare_FoldedObject().IsEqual(_().json.ParseObjectWith(
+        _().text.ParseString(default.preparedJObjectString))));
+    Test_ExpectTrue(Prepare_FoldedObject().IsEqual(_().json.ParseObject(
+        _().text.FromString(default.preparedJObjectString))));
+    Test_ExpectTrue(Prepare_FoldedObject().IsEqual(_().json.ParseObjectRaw(
+        _().text.StringToRaw(default.preparedJObjectString))));
+    Test_ExpectTrue(Prepare_FoldedObject().IsEqual(
+        _().json.ParseObjectString(default.preparedJObjectString)));
+}
+
+protected static function SubTest_JSONObjectParsingWithParser()
+{
+    local JObject parsedObject;
+    Issue("`ParseObjectWith()` cannot parse empty JSON object.");
+    parsedObject = _().json.ParseObjectWith(_().text.ParseString("{}"));
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetKeys().length == 0);
+
+    Issue("`ParseObjectWith()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedObject = _().json.ParseObjectWith(_().text.ParseString("{}"));
+    TEST_ExpectNone(_().json.ParseObjectWith(_().text.ParseString("")));
+    TEST_ExpectNone(_().json.ParseObjectWith(
+        _().text.ParseString("{\"var\": 89")));
+    TEST_ExpectNone(_().json.ParseObjectWith(
+        _().text.ParseString("\"var\": 89}")));
+    TEST_ExpectNone(_().json.ParseObjectWith(
+        _().text.ParseString("{var:false}")));
+
+    Issue("`ParseObjectWith()` cannot parse simple JSON object.");
+    parsedObject = _().json.ParseObjectWith(
+        _().text.ParseString("{\"var\":7 ,\"str\":\"aye!~\"}"));
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetNumber("var") == 7);
+    TEST_ExpectTrue(parsedObject.GetString("str") == "aye!~");
+
+    Issue("`JObject.ParseIntoSelfWith()` cannot add new properties.");
+    TEST_ExpectTrue(parsedObject.ParseIntoSelfWith(
+        _().text.ParseString("{\"newVar\": true}")));
+    TEST_ExpectTrue(parsedObject.GetBoolean("newVar"));
+}
+
+protected static function SubTest_JSONArrayParsingWithParser()
+{
+    local JArray parsedArray;
+    Issue("`ParseArrayWith()` cannot parse empty JSON array.");
+    parsedArray = _().json.ParseArrayWith(_().text.ParseString("[]"));
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.GetLength() == 0);
+
+    Issue("`ParseArrayWith()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedArray = _().json.ParseArrayWith(_().text.ParseString("[]"));
+    TEST_ExpectNone(_().json.ParseArrayWith(_().text.ParseString("")));
+    TEST_ExpectNone(_().json.ParseArrayWith(_().text.ParseString("[89")));
+    TEST_ExpectNone(_().json.ParseArrayWith(_().text.ParseString("89]")));
+    TEST_ExpectNone(_().json.ParseArrayWith(
+        _().text.ParseString("[false null]")));
+
+    Issue("`ParseArrayWith()` cannot parse simple JSON array.");
+    parsedArray = _().json.ParseArrayWith(
+        _().text.ParseString("[null, 67.349e2, \"what\"  , {}]"));
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.IsNull(0));
+    TEST_ExpectTrue(parsedArray.GetNumber(1) == 6734.9);
+    TEST_ExpectTrue(parsedArray.GetString(2) == "what");
+    TEST_ExpectTrue(parsedArray.GetObject(3).GetKeys().length == 0);
+
+    Issue("`JArray.ParseIntoSelfWith()` cannot add new elements.");
+    TEST_ExpectTrue(parsedArray.ParseIntoSelfWith(
+        _().text.ParseString("[\"huh\", Null]")));
+    TEST_ExpectTrue(parsedArray.GetString(4) == "huh");
+    TEST_ExpectTrue(parsedArray.IsNull(5));
+}
+
+protected static function SubTest_JSONObjectParsingText()
+{
+    local JObject parsedObject;
+    Issue("`ParseObject()` cannot parse empty JSON object.");
+    parsedObject = _().json.ParseObject(_().text.FromString("{}"));
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetKeys().length == 0);
+
+    Issue("`ParseObject()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedObject = _().json.ParseObject(_().text.FromString("{}"));
+    TEST_ExpectNone(_().json.ParseObject(_().text.FromString("")));
+    TEST_ExpectNone(_().json.ParseObject(_().text.FromString("{\"var\": 89")));
+    TEST_ExpectNone(_().json.ParseObject(_().text.FromString("\"var\": 89}")));
+    TEST_ExpectNone(_().json.ParseObject(_().text.FromString("{var:false}")));
+
+    Issue("`ParseObject()` cannot parse simple JSON object.");
+    parsedObject = _().json.ParseObject(
+        _().text.FromString("{\"var\":7 ,\"str\":\"aye!~\"}"));
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetNumber("var") == 7);
+    TEST_ExpectTrue(parsedObject.GetString("str") == "aye!~");
+
+    Issue("`JObject.ParseIntoSelf()` cannot add new properties.");
+    TEST_ExpectTrue(parsedObject.ParseIntoSelf(
+        _().text.FromString("{\"newVar\": true}")));
+    TEST_ExpectTrue(parsedObject.GetBoolean("newVar"));
+}
+
+protected static function SubTest_JSONArrayParsingText()
+{
+    local JArray parsedArray;
+    Issue("`ParseArray()` cannot parse empty JSON array.");
+    parsedArray = _().json.ParseArray(_().text.FromString("[]"));
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.GetLength() == 0);
+
+    Issue("`ParseArray()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedArray = _().json.ParseArray(_().text.FromString("[]"));
+    TEST_ExpectNone(_().json.ParseArray(_().text.FromString("")));
+    TEST_ExpectNone(_().json.ParseArray(_().text.FromString("[89")));
+    TEST_ExpectNone(_().json.ParseArray(_().text.FromString("89]")));
+    TEST_ExpectNone(_().json.ParseArray(_().text.FromString("[false null]")));
+
+    Issue("`ParseArray()` cannot parse simple JSON array.");
+    parsedArray = _().json.ParseArray(
+        _().text.FromString("[null, 67.349e2, \"what\"  , {}]"));
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.IsNull(0));
+    TEST_ExpectTrue(parsedArray.GetNumber(1) == 6734.9);
+    TEST_ExpectTrue(parsedArray.GetString(2) == "what");
+    TEST_ExpectTrue(parsedArray.GetObject(3).GetKeys().length == 0);
+
+    Issue("`JArray.ParseIntoSelf()` cannot add new elements.");
+    TEST_ExpectTrue(parsedArray.ParseIntoSelf(
+        _().text.FromString("[\"huh\", Null]")));
+    TEST_ExpectTrue(parsedArray.GetString(4) == "huh");
+    TEST_ExpectTrue(parsedArray.IsNull(5));
+}
+
+protected static function SubTest_JSONObjectParsingRaw()
+{
+    local JObject parsedObject;
+    Issue("`ParseObjectRaw()` cannot parse empty JSON object.");
+    parsedObject = _().json.ParseObjectRaw(_().text.StringToRaw("{}"));
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetKeys().length == 0);
+
+    Issue("`ParseObjectRaw()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedObject = _().json.ParseObjectRaw(_().text.StringToRaw("{}"));
+    TEST_ExpectNone(_().json.ParseObjectRaw(_().text.StringToRaw("")));
+    TEST_ExpectNone(_().json.ParseObjectRaw(
+        _().text.StringToRaw("{\"var\": 89")));
+    TEST_ExpectNone(_().json.ParseObjectRaw(
+        _().text.StringToRaw("\"var\": 89}")));
+    TEST_ExpectNone(_().json.ParseObjectRaw(
+        _().text.StringToRaw("{var:false}")));
+
+    Issue("`ParseObjectRaw()` cannot parse simple JSON object.");
+    parsedObject = _().json.ParseObjectRaw(
+        _().text.StringToRaw("{\"var\":7 ,\"str\":\"aye!~\"}"));
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetNumber("var") == 7);
+    TEST_ExpectTrue(parsedObject.GetString("str") == "aye!~");
+
+    Issue("`JObject.ParseIntoSelfRaw()` cannot add new properties.");
+    TEST_ExpectTrue(parsedObject.ParseIntoSelfRaw(
+        _().text.StringToRaw("{\"newVar\": true}")));
+    TEST_ExpectTrue(parsedObject.GetBoolean("newVar"));
+}
+
+protected static function SubTest_JSONArrayParsingRaw()
+{
+    local JArray parsedArray;
+    Issue("`ParseArrayRaw()` cannot parse empty JSON array.");
+    parsedArray = _().json.ParseArrayRaw(_().text.StringToRaw("[]"));
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.GetLength() == 0);
+
+    Issue("`ParseArrayRaw()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedArray = _().json.ParseArrayRaw(_().text.StringToRaw("[]"));
+    TEST_ExpectNone(_().json.ParseArrayRaw(_().text.StringToRaw("")));
+    TEST_ExpectNone(_().json.ParseArrayRaw(_().text.StringToRaw("[89")));
+    TEST_ExpectNone(_().json.ParseArrayRaw(_().text.StringToRaw("89]")));
+    TEST_ExpectNone(_().json.ParseArrayRaw(
+        _().text.StringToRaw("[false null]")));
+
+    Issue("`ParseArrayRaw()` cannot parse simple JSON array.");
+    parsedArray = _().json.ParseArrayRaw(
+        _().text.StringToRaw("[null, 67.349e2, \"what\"  , {}]"));
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.IsNull(0));
+    TEST_ExpectTrue(parsedArray.GetNumber(1) == 6734.9);
+    TEST_ExpectTrue(parsedArray.GetString(2) == "what");
+    TEST_ExpectTrue(parsedArray.GetObject(3).GetKeys().length == 0);
+
+    Issue("`JArray.ParseIntoSelfRaw()` cannot add new elements.");
+    TEST_ExpectTrue(parsedArray.ParseIntoSelfRaw(
+        _().text.StringToRaw("[\"huh\", Null]")));
+    TEST_ExpectTrue(parsedArray.GetString(4) == "huh");
+    TEST_ExpectTrue(parsedArray.IsNull(5));
+}
+
+protected static function SubTest_JSONObjectParsingString()
+{
+    local JObject parsedObject;
+    Issue("`ParseObjectString()` cannot parse empty JSON object.");
+    parsedObject = _().json.ParseObjectString("{}");
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetKeys().length == 0);
+
+    Issue("`ParseObjectString()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedObject = _().json.ParseObjectString("{}");
+    TEST_ExpectNone(_().json.ParseObjectString(""));
+    TEST_ExpectNone(_().json.ParseObjectString("{\"var\": 89"));
+    TEST_ExpectNone(_().json.ParseObjectString("\"var\": 89}"));
+    TEST_ExpectNone(_().json.ParseObjectString("{var:false}"));
+
+    Issue("`ParseObjectString()` cannot parse simple JSON object.");
+    parsedObject = _().json.ParseObjectString("{\"var\":7 ,\"str\":\"aye!~\"}");
+    TEST_ExpectNotNone(parsedObject);
+    TEST_ExpectTrue(parsedObject.GetNumber("var") == 7);
+    TEST_ExpectTrue(parsedObject.GetString("str") == "aye!~");
+
+    Issue("`JObject.ParseIntoSelfString()` cannot add new properties.");
+    TEST_ExpectTrue(parsedObject.ParseIntoSelfString("{\"newVar\": true}"));
+    TEST_ExpectTrue(parsedObject.GetBoolean("newVar"));
+}
+
+protected static function SubTest_JSONArrayParsingString()
+{
+    local JArray parsedArray;
+    Issue("`ParseArrayString()` cannot parse empty JSON array.");
+    parsedArray = _().json.ParseArrayString("[]");
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.GetLength() == 0);
+
+    Issue("`ParseArrayString()` doesn't report error when parsing an incorrect"
+        @ "object.");
+    parsedArray = _().json.ParseArrayString("[]");
+    TEST_ExpectNone(_().json.ParseArrayString(""));
+    TEST_ExpectNone(_().json.ParseArrayString("[89"));
+    TEST_ExpectNone(_().json.ParseArrayString("89]"));
+    TEST_ExpectNone(_().json.ParseArrayString("[false null]"));
+
+    Issue("`ParseArrayString()` cannot parse simple JSON array.");
+    parsedArray = _().json.ParseArrayString("[null, 67.349e2, \"what\"  , {}]");
+    TEST_ExpectNotNone(parsedArray);
+    TEST_ExpectTrue(parsedArray.IsNull(0));
+    TEST_ExpectTrue(parsedArray.GetNumber(1) == 6734.9);
+    TEST_ExpectTrue(parsedArray.GetString(2) == "what");
+    TEST_ExpectTrue(parsedArray.GetObject(3).GetKeys().length == 0);
+
+    Issue("`JArray.ParseIntoSelfString()` cannot add new elements.");
+    TEST_ExpectTrue(parsedArray.ParseIntoSelfString("[\"huh\", Null]"));
+    TEST_ExpectTrue(parsedArray.GetString(4) == "huh");
+    TEST_ExpectTrue(parsedArray.IsNull(5));
+}
+
 defaultproperties
 {
     caseName = "JSON"
+    preparedJObjectString = "{\"innerObject\":{\"my_bool\":true,\"array\":[\"Engine.Actor\",false,null,{\"something here\":\"yes\",\"maybe\":0.003},56.6],\"one more\":{\"nope\":324532,\"whatever\":false,\"o rly?\":\"ya rly\"},\"my_int\":-9823452},\"some_var\":-7.32,\"another_var\":\"aye!\"}"
 }