json.js 14.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Date toJSON
29 30 31
assertEquals("1970-01-01T00:00:00.000Z", new Date(0).toJSON());
assertEquals("1979-01-11T08:00:00.000Z", new Date("1979-01-11 08:00 GMT").toJSON());
assertEquals("2005-05-05T05:05:05.000Z", new Date("2005-05-05 05:05:05 GMT").toJSON());
32 33 34 35 36 37 38 39 40 41 42 43 44 45
var n1 = new Date(10000);
n1.toISOString = function () { return "foo"; };
assertEquals("foo", n1.toJSON());
var n2 = new Date(10001);
n2.toISOString = null;
assertThrows(function () { n2.toJSON(); }, TypeError);
var n4 = new Date(10003);
n4.toISOString = function () {
  assertEquals(0, arguments.length);
  assertEquals(this, n4);
  return null;
};
assertEquals(null, n4.toJSON());

46
assertTrue(Object.prototype === JSON.__proto__);
47 48
assertEquals("[object JSON]", Object.prototype.toString.call(JSON));

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85
//Test Date.prototype.toJSON as generic function.
var d1 = {toJSON: Date.prototype.toJSON,
         toISOString: function() { return 42; }};
assertEquals(42, d1.toJSON());

var d2 = {toJSON: Date.prototype.toJSON,
          valueOf: function() { return Infinity; },
          toISOString: function() { return 42; }};
assertEquals(null, d2.toJSON());

var d3 = {toJSON: Date.prototype.toJSON,
          valueOf: "not callable",
          toString: function() { return Infinity; },
          toISOString: function() { return 42; }};

assertEquals(null, d3.toJSON());

var d4 = {toJSON: Date.prototype.toJSON,
          valueOf: "not callable",
          toString: "not callable either",
          toISOString: function() { return 42; }};
assertThrows("d4.toJSON()", TypeError);  // ToPrimitive throws. 

var d5 = {toJSON: Date.prototype.toJSON,
          valueOf: "not callable",
          toString: function() { return "Infinity"; },
          toISOString: function() { return 42; }};
assertEquals(42, d5.toJSON());

var d6 = {toJSON: Date.prototype.toJSON,
          toISOString: function() { return ["not primitive"]; }};
assertEquals(["not primitive"], d6.toJSON());

var d7 = {toJSON: Date.prototype.toJSON,
          ISOString: "not callable"};
assertThrows("d7.toJSON()", TypeError);

86
// DontEnum
87
for (var p in this) {
88
  assertFalse(p == "JSON");
89
}
90 91 92

// Parse
assertEquals({}, JSON.parse("{}"));
93
assertEquals({42:37}, JSON.parse('{"42":37}'));
94 95 96 97 98
assertEquals(null, JSON.parse("null"));
assertEquals(true, JSON.parse("true"));
assertEquals(false, JSON.parse("false"));
assertEquals("foo", JSON.parse('"foo"'));
assertEquals("f\no", JSON.parse('"f\\no"'));
99 100 101 102 103 104 105 106
assertEquals("\b\f\n\r\t\"\u2028\/\\",
             JSON.parse('"\\b\\f\\n\\r\\t\\"\\u2028\\/\\\\"'));
assertEquals([1.1], JSON.parse("[1.1]"));
assertEquals([1], JSON.parse("[1.0]"));

assertEquals(0, JSON.parse("0"));
assertEquals(1, JSON.parse("1"));
assertEquals(0.1, JSON.parse("0.1"));
107
assertEquals(1.1, JSON.parse("1.1"));
108 109 110 111 112 113 114 115 116 117 118 119 120 121 122
assertEquals(1.1, JSON.parse("1.100000"));
assertEquals(1.111111, JSON.parse("1.111111"));
assertEquals(-0, JSON.parse("-0"));
assertEquals(-1, JSON.parse("-1"));
assertEquals(-0.1, JSON.parse("-0.1"));
assertEquals(-1.1, JSON.parse("-1.1"));
assertEquals(-1.1, JSON.parse("-1.100000"));
assertEquals(-1.111111, JSON.parse("-1.111111"));
assertEquals(11, JSON.parse("1.1e1"));
assertEquals(11, JSON.parse("1.1e+1"));
assertEquals(0.11, JSON.parse("1.1e-1"));
assertEquals(11, JSON.parse("1.1E1"));
assertEquals(11, JSON.parse("1.1E+1"));
assertEquals(0.11, JSON.parse("1.1E-1"));

123 124 125 126
assertEquals([], JSON.parse("[]"));
assertEquals([1], JSON.parse("[1]"));
assertEquals([1, "2", true, null], JSON.parse('[1, "2", true, null]'));

127 128 129 130 131
assertEquals("", JSON.parse('""'));
assertEquals(["", "", -0, ""], JSON.parse('[    ""  ,    ""  ,   -0,    ""]'));
assertEquals("", JSON.parse('""'));


132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160
function GetFilter(name) {
  function Filter(key, value) {
    return (key == name) ? undefined : value;
  }
  return Filter;
}

var pointJson = '{"x": 1, "y": 2}';
assertEquals({'x': 1, 'y': 2}, JSON.parse(pointJson));
assertEquals({'x': 1}, JSON.parse(pointJson, GetFilter('y')));
assertEquals({'y': 2}, JSON.parse(pointJson, GetFilter('x')));
assertEquals([1, 2, 3], JSON.parse("[1, 2, 3]"));
assertEquals([1, undefined, 3], JSON.parse("[1, 2, 3]", GetFilter(1)));
assertEquals([1, 2, undefined], JSON.parse("[1, 2, 3]", GetFilter(2)));

function DoubleNumbers(key, value) {
  return (typeof value == 'number') ? 2 * value : value;
}

var deepObject = '{"a": {"b": 1, "c": 2}, "d": {"e": {"f": 3}}}';
assertEquals({"a": {"b": 1, "c": 2}, "d": {"e": {"f": 3}}},
             JSON.parse(deepObject));
assertEquals({"a": {"b": 2, "c": 4}, "d": {"e": {"f": 6}}},
             JSON.parse(deepObject, DoubleNumbers));

function TestInvalid(str) {
  assertThrows(function () { JSON.parse(str); }, SyntaxError);
}

161 162 163 164 165
TestInvalid('abcdef');
TestInvalid('isNaN()');
TestInvalid('{"x": [1, 2, deepObject]}');
TestInvalid('[1, [2, [deepObject], 3], 4]');
TestInvalid('function () { return 0; }');
166 167 168 169

TestInvalid("[1, 2");
TestInvalid('{"x": 3');

170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198
// JavaScript number literals not valid in JSON.
TestInvalid('[01]');
TestInvalid('[.1]');
TestInvalid('[1.]');
TestInvalid('[1.e1]');
TestInvalid('[-.1]');
TestInvalid('[-1.]');

// Plain invalid number literals.
TestInvalid('-');
TestInvalid('--1');
TestInvalid('-1e');
TestInvalid('1e--1]');
TestInvalid('1e+-1');
TestInvalid('1e-+1');
TestInvalid('1e++1');

// JavaScript string literals not valid in JSON.
TestInvalid("'single quote'");  // Valid JavaScript
TestInvalid('"\\a invalid escape"');
TestInvalid('"\\v invalid escape"');  // Valid JavaScript
TestInvalid('"\\\' invalid escape"');  // Valid JavaScript
TestInvalid('"\\x42 invalid escape"');  // Valid JavaScript
TestInvalid('"\\u202 invalid escape"');
TestInvalid('"\\012 invalid escape"');
TestInvalid('"Unterminated string');
TestInvalid('"Unterminated string\\"');
TestInvalid('"Unterminated string\\\\\\"');

199 200
// JavaScript RegExp literals not valid in JSON.
TestInvalid('/true/');
201

202
// Test bad JSON that would be good JavaScript (ES5).
203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
TestInvalid("{true:42}");
TestInvalid("{false:42}");
TestInvalid("{null:42}");
TestInvalid("{'foo':42}");
TestInvalid("{42:42}");
TestInvalid("{0:42}");
TestInvalid("{-1:42}");

// Test for trailing garbage detection.
TestInvalid('42 px');
TestInvalid('42 .2');
TestInvalid('42 2');
TestInvalid('42 e1');
TestInvalid('"42" ""');
TestInvalid('"42" ""');
TestInvalid('"" ""');
TestInvalid('true ""');
TestInvalid('false ""');
TestInvalid('null ""');
TestInvalid('null ""');
TestInvalid('[] ""');
TestInvalid('[true] ""');
TestInvalid('{} ""');
TestInvalid('{"x":true} ""');
TestInvalid('"Garbage""After string"');

229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276
// Stringify

assertEquals("true", JSON.stringify(true));
assertEquals("false", JSON.stringify(false));
assertEquals("null", JSON.stringify(null));
assertEquals("false", JSON.stringify({toJSON: function () { return false; }}));
assertEquals("4", JSON.stringify(4));
assertEquals('"foo"', JSON.stringify("foo"));
assertEquals("null", JSON.stringify(Infinity));
assertEquals("null", JSON.stringify(-Infinity));
assertEquals("null", JSON.stringify(NaN));
assertEquals("4", JSON.stringify(new Number(4)));
assertEquals('"bar"', JSON.stringify(new String("bar")));

assertEquals('"foo\\u0000bar"', JSON.stringify("foo\0bar"));
assertEquals('"f\\"o\'o\\\\b\\ba\\fr\\nb\\ra\\tz"',
             JSON.stringify("f\"o\'o\\b\ba\fr\nb\ra\tz"));

assertEquals("[1,2,3]", JSON.stringify([1, 2, 3]));
assertEquals("[\n 1,\n 2,\n 3\n]", JSON.stringify([1, 2, 3], null, 1));
assertEquals("[\n  1,\n  2,\n  3\n]", JSON.stringify([1, 2, 3], null, 2));
assertEquals("[\n  1,\n  2,\n  3\n]",
             JSON.stringify([1, 2, 3], null, new Number(2)));
assertEquals("[\n^1,\n^2,\n^3\n]", JSON.stringify([1, 2, 3], null, "^"));
assertEquals("[\n^1,\n^2,\n^3\n]",
             JSON.stringify([1, 2, 3], null, new String("^")));
assertEquals("[\n 1,\n 2,\n [\n  3,\n  [\n   4\n  ],\n  5\n ],\n 6,\n 7\n]",
             JSON.stringify([1, 2, [3, [4], 5], 6, 7], null, 1));
assertEquals("[]", JSON.stringify([], null, 1));
assertEquals("[1,2,[3,[4],5],6,7]",
             JSON.stringify([1, 2, [3, [4], 5], 6, 7], null));
assertEquals("[2,4,[6,[8],10],12,14]",
             JSON.stringify([1, 2, [3, [4], 5], 6, 7], DoubleNumbers));

var circular = [1, 2, 3];
circular[2] = circular;
assertThrows(function () { JSON.stringify(circular); }, TypeError);

var singleton = [];
var multiOccurrence = [singleton, singleton, singleton];
assertEquals("[[],[],[]]", JSON.stringify(multiOccurrence));

assertEquals('{"x":5,"y":6}', JSON.stringify({x:5,y:6}));
assertEquals('{"x":5}', JSON.stringify({x:5,y:6}, ['x']));
assertEquals('{\n "a": "b",\n "c": "d"\n}',
             JSON.stringify({a:"b",c:"d"}, null, 1));
assertEquals('{"y":6,"x":5}', JSON.stringify({x:5,y:6}, ['y', 'x']));

277 278 279 280 281 282
// toJSON get string keys.
var checker = {};
var array = [checker];
checker.toJSON = function(key) { return 1 + key; };
assertEquals('["10"]', JSON.stringify(array));

283 284
// The gap is capped at ten characters if specified as string.
assertEquals('{\n          "a": "b",\n          "c": "d"\n}',
285
              JSON.stringify({a:"b",c:"d"}, null,
286 287 288 289 290 291 292 293 294 295 296 297
                             "          /*characters after 10th*/"));

//The gap is capped at ten characters if specified as number.
assertEquals('{\n          "a": "b",\n          "c": "d"\n}',
              JSON.stringify({a:"b",c:"d"}, null, 15));

// Replaced wrapped primitives are unwrapped.
function newx(k, v)  { return (k == "x") ? new v(42) : v; }
assertEquals('{"x":"42"}', JSON.stringify({x: String}, newx));
assertEquals('{"x":42}', JSON.stringify({x: Number}, newx));
assertEquals('{"x":true}', JSON.stringify({x: Boolean}, newx));

298 299
assertEquals(undefined, JSON.stringify(undefined));
assertEquals(undefined, JSON.stringify(function () { }));
300
// Arrays with missing, undefined or function elements have those elements
301
// replaced by null.
302
assertEquals("[null,null,null]",
303 304 305 306
             JSON.stringify([undefined,,function(){}]));

// Objects with undefined or function properties (including replaced properties)
// have those properties ignored.
307
assertEquals('{}',
308
             JSON.stringify({a: undefined, b: function(){}, c: 42, d: 42},
309
                            function(k, v) { if (k == "c") return undefined;
310 311
                                             if (k == "d") return function(){};
                                             return v; }));
312

313
TestInvalid('1); throw "foo"; (1');
314 315 316

var x = 0;
eval("(1); x++; (1)");
317
TestInvalid('1); x++; (1');
318 319 320 321

// Test string conversion of argument.
var o = { toString: function() { return "42"; } };
assertEquals(42, JSON.parse(o));
322 323 324 325 326 327 328 329 330 331 332


for (var i = 0; i < 65536; i++) {
  var string = String.fromCharCode(i);
  var encoded = JSON.stringify(string);
  var expected = "uninitialized";
  // Following the ES5 specification of the abstraction function Quote.
  if (string == '"' || string == '\\') {
    // Step 2.a
    expected = '\\' + string;
  } else if ("\b\t\n\r\f".indexOf(string) >= 0) {
333
    // Step 2.b
334 335 336 337 338 339 340 341 342 343 344 345 346 347
    if (string == '\b') expected = '\\b';
    else if (string == '\t') expected = '\\t';
    else if (string == '\n') expected = '\\n';
    else if (string == '\f') expected = '\\f';
    else if (string == '\r') expected = '\\r';
  } else if (i < 32) {
    // Step 2.c
    if (i < 16) {
      expected = "\\u000" + i.toString(16);
    } else {
      expected = "\\u00" + i.toString(16);
    }
  } else {
    expected = string;
348
  }
349
  assertEquals('"' + expected + '"', encoded, "Codepoint " + i);
350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417
}


// Ensure that wrappers and callables are handled correctly.
var num37 = new Number(42);
num37.valueOf = function() { return 37; };

var numFoo = new Number(42);
numFoo.valueOf = "not callable";
numFoo.toString = function() { return "foo"; };

var numTrue = new Number(42);
numTrue.valueOf = function() { return true; }

var strFoo = new String("bar");
strFoo.toString = function() { return "foo"; };

var str37 = new String("bar");
str37.toString = "not callable";
str37.valueOf = function() { return 37; };

var strTrue = new String("bar");
strTrue.toString = function() { return true; }

var func = function() { /* Is callable */ };

var funcJSON = function() { /* Is callable */ };
funcJSON.toJSON = function() { return "has toJSON"; };

var re = /Is callable/;

var reJSON = /Is callable/;
reJSON.toJSON = function() { return "has toJSON"; };

assertEquals(
    '[37,null,1,"foo","37","true",null,"has toJSON",null,"has toJSON"]',
    JSON.stringify([num37, numFoo, numTrue,
                    strFoo, str37, strTrue,
                    func, funcJSON, re, reJSON]));


var oddball = Object(42);
oddball.__proto__ = { __proto__: null, toString: function() { return true; } };
assertEquals('1', JSON.stringify(oddball));

var getCount = 0;
var callCount = 0;
var counter = { get toJSON() { getCount++;
                               return function() { callCount++;
                                                   return 42; }; } };
assertEquals('42', JSON.stringify(counter));
assertEquals(1, getCount);
assertEquals(1, callCount);

var oddball2 = Object(42);
var oddball3 = Object("foo");
oddball3.__proto__ = { __proto__: null,
                       toString: "not callable",
                       valueOf: function() { return true; } };
oddball2.__proto__ = { __proto__: null,
                       toJSON: function () { return oddball3; } }
assertEquals('"true"', JSON.stringify(oddball2));


var falseNum = Object("37");
falseNum.__proto__ = Number.prototype;
falseNum.toString = function() { return 42; };
assertEquals('"42"', JSON.stringify(falseNum));