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1// Copyright 2009 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Date toJSON
29assertEquals("1970-01-01T00:00:00.000Z", new Date(0).toJSON());
30assertEquals("1979-01-11T08:00:00.000Z", new Date("1979-01-11 08:00 GMT").toJSON());
31assertEquals("2005-05-05T05:05:05.000Z", new Date("2005-05-05 05:05:05 GMT").toJSON());
32var n1 = new Date(10000);
33n1.toISOString = function () { return "foo"; };
34assertEquals("foo", n1.toJSON());
35var n2 = new Date(10001);
36n2.toISOString = null;
37assertThrows(function () { n2.toJSON(); }, TypeError);
38var n4 = new Date(10003);
39n4.toISOString = function () {
40  assertEquals(0, arguments.length);
41  assertEquals(this, n4);
42  return null;
43};
44assertEquals(null, n4.toJSON());
45
46assertTrue(Object.prototype === JSON.__proto__);
47assertEquals("[object JSON]", Object.prototype.toString.call(JSON));
48
49//Test Date.prototype.toJSON as generic function.
50var d1 = {toJSON: Date.prototype.toJSON,
51         toISOString: function() { return 42; }};
52assertEquals(42, d1.toJSON());
53
54var d2 = {toJSON: Date.prototype.toJSON,
55          valueOf: function() { return Infinity; },
56          toISOString: function() { return 42; }};
57assertEquals(null, d2.toJSON());
58
59var d3 = {toJSON: Date.prototype.toJSON,
60          valueOf: "not callable",
61          toString: function() { return Infinity; },
62          toISOString: function() { return 42; }};
63
64assertEquals(null, d3.toJSON());
65
66var d4 = {toJSON: Date.prototype.toJSON,
67          valueOf: "not callable",
68          toString: "not callable either",
69          toISOString: function() { return 42; }};
70assertThrows("d4.toJSON()", TypeError);  // ToPrimitive throws.
71
72var d5 = {toJSON: Date.prototype.toJSON,
73          valueOf: "not callable",
74          toString: function() { return "Infinity"; },
75          toISOString: function() { return 42; }};
76assertEquals(42, d5.toJSON());
77
78var d6 = {toJSON: Date.prototype.toJSON,
79          toISOString: function() { return ["not primitive"]; }};
80assertEquals(["not primitive"], d6.toJSON());
81
82var d7 = {toJSON: Date.prototype.toJSON,
83          ISOString: "not callable"};
84assertThrows("d7.toJSON()", TypeError);
85
86// DontEnum
87for (var p in this) {
88  assertFalse(p == "JSON");
89}
90
91// Parse
92assertEquals({}, JSON.parse("{}"));
93assertEquals({42:37}, JSON.parse('{"42":37}'));
94assertEquals(null, JSON.parse("null"));
95assertEquals(true, JSON.parse("true"));
96assertEquals(false, JSON.parse("false"));
97assertEquals("foo", JSON.parse('"foo"'));
98assertEquals("f\no", JSON.parse('"f\\no"'));
99assertEquals("\b\f\n\r\t\"\u2028\/\\",
100             JSON.parse('"\\b\\f\\n\\r\\t\\"\\u2028\\/\\\\"'));
101assertEquals([1.1], JSON.parse("[1.1]"));
102assertEquals([1], JSON.parse("[1.0]"));
103
104assertEquals(0, JSON.parse("0"));
105assertEquals(1, JSON.parse("1"));
106assertEquals(0.1, JSON.parse("0.1"));
107assertEquals(1.1, JSON.parse("1.1"));
108assertEquals(1.1, JSON.parse("1.100000"));
109assertEquals(1.111111, JSON.parse("1.111111"));
110assertEquals(-0, JSON.parse("-0"));
111assertEquals(-1, JSON.parse("-1"));
112assertEquals(-0.1, JSON.parse("-0.1"));
113assertEquals(-1.1, JSON.parse("-1.1"));
114assertEquals(-1.1, JSON.parse("-1.100000"));
115assertEquals(-1.111111, JSON.parse("-1.111111"));
116assertEquals(11, JSON.parse("1.1e1"));
117assertEquals(11, JSON.parse("1.1e+1"));
118assertEquals(0.11, JSON.parse("1.1e-1"));
119assertEquals(11, JSON.parse("1.1E1"));
120assertEquals(11, JSON.parse("1.1E+1"));
121assertEquals(0.11, JSON.parse("1.1E-1"));
122
123assertEquals([], JSON.parse("[]"));
124assertEquals([1], JSON.parse("[1]"));
125assertEquals([1, "2", true, null], JSON.parse('[1, "2", true, null]'));
126
127assertEquals("", JSON.parse('""'));
128assertEquals(["", "", -0, ""], JSON.parse('[    ""  ,    ""  ,   -0,    ""]'));
129assertEquals("", JSON.parse('""'));
130
131
132function GetFilter(name) {
133  function Filter(key, value) {
134    return (key == name) ? undefined : value;
135  }
136  return Filter;
137}
138
139var pointJson = '{"x": 1, "y": 2}';
140assertEquals({'x': 1, 'y': 2}, JSON.parse(pointJson));
141assertEquals({'x': 1}, JSON.parse(pointJson, GetFilter('y')));
142assertEquals({'y': 2}, JSON.parse(pointJson, GetFilter('x')));
143assertEquals([1, 2, 3], JSON.parse("[1, 2, 3]"));
144assertEquals([1, undefined, 3], JSON.parse("[1, 2, 3]", GetFilter(1)));
145assertEquals([1, 2, undefined], JSON.parse("[1, 2, 3]", GetFilter(2)));
146
147function DoubleNumbers(key, value) {
148  return (typeof value == 'number') ? 2 * value : value;
149}
150
151var deepObject = '{"a": {"b": 1, "c": 2}, "d": {"e": {"f": 3}}}';
152assertEquals({"a": {"b": 1, "c": 2}, "d": {"e": {"f": 3}}},
153             JSON.parse(deepObject));
154assertEquals({"a": {"b": 2, "c": 4}, "d": {"e": {"f": 6}}},
155             JSON.parse(deepObject, DoubleNumbers));
156
157function TestInvalid(str) {
158  assertThrows(function () { JSON.parse(str); }, SyntaxError);
159}
160
161TestInvalid('abcdef');
162TestInvalid('isNaN()');
163TestInvalid('{"x": [1, 2, deepObject]}');
164TestInvalid('[1, [2, [deepObject], 3], 4]');
165TestInvalid('function () { return 0; }');
166
167TestInvalid("[1, 2");
168TestInvalid('{"x": 3');
169
170// JavaScript number literals not valid in JSON.
171TestInvalid('[01]');
172TestInvalid('[.1]');
173TestInvalid('[1.]');
174TestInvalid('[1.e1]');
175TestInvalid('[-.1]');
176TestInvalid('[-1.]');
177
178// Plain invalid number literals.
179TestInvalid('-');
180TestInvalid('--1');
181TestInvalid('-1e');
182TestInvalid('1e--1]');
183TestInvalid('1e+-1');
184TestInvalid('1e-+1');
185TestInvalid('1e++1');
186
187// JavaScript string literals not valid in JSON.
188TestInvalid("'single quote'");  // Valid JavaScript
189TestInvalid('"\\a invalid escape"');
190TestInvalid('"\\v invalid escape"');  // Valid JavaScript
191TestInvalid('"\\\' invalid escape"');  // Valid JavaScript
192TestInvalid('"\\x42 invalid escape"');  // Valid JavaScript
193TestInvalid('"\\u202 invalid escape"');
194TestInvalid('"\\012 invalid escape"');
195TestInvalid('"Unterminated string');
196TestInvalid('"Unterminated string\\"');
197TestInvalid('"Unterminated string\\\\\\"');
198
199// Test bad JSON that would be good JavaScript (ES5).
200TestInvalid("{true:42}");
201TestInvalid("{false:42}");
202TestInvalid("{null:42}");
203TestInvalid("{'foo':42}");
204TestInvalid("{42:42}");
205TestInvalid("{0:42}");
206TestInvalid("{-1:42}");
207
208// Test for trailing garbage detection.
209TestInvalid('42 px');
210TestInvalid('42 .2');
211TestInvalid('42 2');
212TestInvalid('42 e1');
213TestInvalid('"42" ""');
214TestInvalid('"42" ""');
215TestInvalid('"" ""');
216TestInvalid('true ""');
217TestInvalid('false ""');
218TestInvalid('null ""');
219TestInvalid('null ""');
220TestInvalid('[] ""');
221TestInvalid('[true] ""');
222TestInvalid('{} ""');
223TestInvalid('{"x":true} ""');
224TestInvalid('"Garbage""After string"');
225
226// Stringify
227
228function TestStringify(expected, input) {
229  assertEquals(expected, JSON.stringify(input));
230  assertEquals(expected, JSON.stringify(input, null, 0));
231}
232
233TestStringify("true", true);
234TestStringify("false", false);
235TestStringify("null", null);
236TestStringify("false", {toJSON: function () { return false; }});
237TestStringify("4", 4);
238TestStringify('"foo"', "foo");
239TestStringify("null", Infinity);
240TestStringify("null", -Infinity);
241TestStringify("null", NaN);
242TestStringify("4", new Number(4));
243TestStringify('"bar"', new String("bar"));
244
245TestStringify('"foo\\u0000bar"', "foo\0bar");
246TestStringify('"f\\"o\'o\\\\b\\ba\\fr\\nb\\ra\\tz"',
247              "f\"o\'o\\b\ba\fr\nb\ra\tz");
248
249TestStringify("[1,2,3]", [1, 2, 3]);
250assertEquals("[\n 1,\n 2,\n 3\n]", JSON.stringify([1, 2, 3], null, 1));
251assertEquals("[\n  1,\n  2,\n  3\n]", JSON.stringify([1, 2, 3], null, 2));
252assertEquals("[\n  1,\n  2,\n  3\n]",
253             JSON.stringify([1, 2, 3], null, new Number(2)));
254assertEquals("[\n^1,\n^2,\n^3\n]", JSON.stringify([1, 2, 3], null, "^"));
255assertEquals("[\n^1,\n^2,\n^3\n]",
256             JSON.stringify([1, 2, 3], null, new String("^")));
257assertEquals("[\n 1,\n 2,\n [\n  3,\n  [\n   4\n  ],\n  5\n ],\n 6,\n 7\n]",
258             JSON.stringify([1, 2, [3, [4], 5], 6, 7], null, 1));
259assertEquals("[]", JSON.stringify([], null, 1));
260assertEquals("[1,2,[3,[4],5],6,7]",
261             JSON.stringify([1, 2, [3, [4], 5], 6, 7], null));
262assertEquals("[2,4,[6,[8],10],12,14]",
263             JSON.stringify([1, 2, [3, [4], 5], 6, 7], DoubleNumbers));
264TestStringify('["a","ab","abc"]', ["a","ab","abc"]);
265TestStringify('{"a":1,"c":true}', { a : 1,
266                                    b : function() { 1 },
267                                    c : true,
268                                    d : function() { 2 } });
269TestStringify('[1,null,true,null]',
270              [1, function() { 1 }, true, function() { 2 }]);
271TestStringify('"toJSON 123"',
272              { toJSON : function() { return 'toJSON 123'; } });
273TestStringify('{"a":321}',
274              { a : { toJSON : function() { return 321; } } });
275var counter = 0;
276assertEquals('{"getter":123}',
277             JSON.stringify({ get getter() { counter++; return 123; } }));
278assertEquals(1, counter);
279assertEquals('{"getter":123}',
280             JSON.stringify({ get getter() { counter++; return 123; } },
281                            null,
282                            0));
283assertEquals(2, counter);
284
285TestStringify('{"a":"abc","b":"\u1234bc"}',
286              { a : "abc", b : "\u1234bc" });
287
288
289var a = { a : 1, b : 2 };
290delete a.a;
291TestStringify('{"b":2}', a);
292
293var b = {};
294b.__proto__ = { toJSON : function() { return 321;} };
295TestStringify("321", b);
296
297var array = [""];
298var expected = '""';
299for (var i = 0; i < 10000; i++) {
300  array.push("");
301  expected = '"",' + expected;
302}
303expected = '[' + expected + ']';
304TestStringify(expected, array);
305
306
307var circular = [1, 2, 3];
308circular[2] = circular;
309assertThrows(function () { JSON.stringify(circular); }, TypeError);
310assertThrows(function () { JSON.stringify(circular, null, 0); }, TypeError);
311
312var singleton = [];
313var multiOccurrence = [singleton, singleton, singleton];
314TestStringify("[[],[],[]]", multiOccurrence);
315
316TestStringify('{"x":5,"y":6}', {x:5,y:6});
317assertEquals('{"x":5}', JSON.stringify({x:5,y:6}, ['x']));
318assertEquals('{\n "a": "b",\n "c": "d"\n}',
319             JSON.stringify({a:"b",c:"d"}, null, 1));
320assertEquals('{"y":6,"x":5}', JSON.stringify({x:5,y:6}, ['y', 'x']));
321
322// toJSON get string keys.
323var checker = {};
324var array = [checker];
325checker.toJSON = function(key) { return 1 + key; };
326TestStringify('["10"]', array);
327
328// The gap is capped at ten characters if specified as string.
329assertEquals('{\n          "a": "b",\n          "c": "d"\n}',
330              JSON.stringify({a:"b",c:"d"}, null,
331                             "          /*characters after 10th*/"));
332
333//The gap is capped at ten characters if specified as number.
334assertEquals('{\n          "a": "b",\n          "c": "d"\n}',
335              JSON.stringify({a:"b",c:"d"}, null, 15));
336
337// Replaced wrapped primitives are unwrapped.
338function newx(k, v)  { return (k == "x") ? new v(42) : v; }
339assertEquals('{"x":"42"}', JSON.stringify({x: String}, newx));
340assertEquals('{"x":42}', JSON.stringify({x: Number}, newx));
341assertEquals('{"x":true}', JSON.stringify({x: Boolean}, newx));
342
343TestStringify(undefined, undefined);
344TestStringify(undefined, function () { });
345// Arrays with missing, undefined or function elements have those elements
346// replaced by null.
347TestStringify("[null,null,null]", [undefined,,function(){}]);
348
349// Objects with undefined or function properties (including replaced properties)
350// have those properties ignored.
351assertEquals('{}',
352             JSON.stringify({a: undefined, b: function(){}, c: 42, d: 42},
353                            function(k, v) { if (k == "c") return undefined;
354                                             if (k == "d") return function(){};
355                                             return v; }));
356
357TestInvalid('1); throw "foo"; (1');
358
359var x = 0;
360eval("(1); x++; (1)");
361TestInvalid('1); x++; (1');
362
363// Test string conversion of argument.
364var o = { toString: function() { return "42"; } };
365assertEquals(42, JSON.parse(o));
366
367
368for (var i = 0; i < 65536; i++) {
369  var string = String.fromCharCode(i);
370  var encoded = JSON.stringify(string);
371  var expected = "uninitialized";
372  // Following the ES5 specification of the abstraction function Quote.
373  if (string == '"' || string == '\\') {
374    // Step 2.a
375    expected = '\\' + string;
376  } else if ("\b\t\n\r\f".indexOf(string) >= 0) {
377    // Step 2.b
378    if (string == '\b') expected = '\\b';
379    else if (string == '\t') expected = '\\t';
380    else if (string == '\n') expected = '\\n';
381    else if (string == '\f') expected = '\\f';
382    else if (string == '\r') expected = '\\r';
383  } else if (i < 32) {
384    // Step 2.c
385    if (i < 16) {
386      expected = "\\u000" + i.toString(16);
387    } else {
388      expected = "\\u00" + i.toString(16);
389    }
390  } else {
391    expected = string;
392  }
393  assertEquals('"' + expected + '"', encoded, "Codepoint " + i);
394}
395
396
397// Ensure that wrappers and callables are handled correctly.
398var num37 = new Number(42);
399num37.valueOf = function() { return 37; };
400
401var numFoo = new Number(42);
402numFoo.valueOf = "not callable";
403numFoo.toString = function() { return "foo"; };
404
405var numTrue = new Number(42);
406numTrue.valueOf = function() { return true; }
407
408var strFoo = new String("bar");
409strFoo.toString = function() { return "foo"; };
410
411var str37 = new String("bar");
412str37.toString = "not callable";
413str37.valueOf = function() { return 37; };
414
415var strTrue = new String("bar");
416strTrue.toString = function() { return true; }
417
418var func = function() { /* Is callable */ };
419
420var funcJSON = function() { /* Is callable */ };
421funcJSON.toJSON = function() { return "has toJSON"; };
422
423var re = /Is callable/;
424
425var reJSON = /Is callable/;
426reJSON.toJSON = function() { return "has toJSON"; };
427
428TestStringify('[37,null,1,"foo","37","true",null,"has toJSON",{},"has toJSON"]',
429              [num37, numFoo, numTrue,
430               strFoo, str37, strTrue,
431               func, funcJSON, re, reJSON]);
432
433
434var oddball = Object(42);
435oddball.__proto__ = { __proto__: null, toString: function() { return true; } };
436TestStringify('1', oddball);
437
438var getCount = 0;
439var callCount = 0;
440var counter = { get toJSON() { getCount++;
441                               return function() { callCount++;
442                                                   return 42; }; } };
443
444// RegExps are not callable, so they are stringified as objects.
445TestStringify('{}', /regexp/);
446TestStringify('42', counter);
447assertEquals(2, getCount);
448assertEquals(2, callCount);
449
450var oddball2 = Object(42);
451var oddball3 = Object("foo");
452oddball3.__proto__ = { __proto__: null,
453                       toString: "not callable",
454                       valueOf: function() { return true; } };
455oddball2.__proto__ = { __proto__: null,
456                       toJSON: function () { return oddball3; } }
457TestStringify('"true"', oddball2);
458
459
460var falseNum = Object("37");
461falseNum.__proto__ = Number.prototype;
462falseNum.toString = function() { return 42; };
463TestStringify('"42"', falseNum);
464
465// Parse an object value as __proto__.
466var o1 = JSON.parse('{"__proto__":[]}');
467assertEquals([], o1.__proto__);
468assertEquals(["__proto__"], Object.keys(o1));
469assertEquals([], Object.getOwnPropertyDescriptor(o1, "__proto__").value);
470assertEquals(["__proto__"], Object.getOwnPropertyNames(o1));
471assertTrue(o1.hasOwnProperty("__proto__"));
472assertTrue(Object.prototype.isPrototypeOf(o1));
473
474// Parse a non-object value as __proto__.
475var o2 = JSON.parse('{"__proto__":5}');
476assertEquals(5, o2.__proto__);
477assertEquals(["__proto__"], Object.keys(o2));
478assertEquals(5, Object.getOwnPropertyDescriptor(o2, "__proto__").value);
479assertEquals(["__proto__"], Object.getOwnPropertyNames(o2));
480assertTrue(o2.hasOwnProperty("__proto__"));
481assertTrue(Object.prototype.isPrototypeOf(o2));
482
483var json = '{"stuff before slash\\\\stuff after slash":"whatever"}';
484TestStringify(json, JSON.parse(json));
485