Reimplement a simpler version of JSON.stringify.

test/mjsunit/json.js

 // 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
@@ skipping 239 matching lines @@
 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));
 assertEquals('["a","ab","abc"]', JSON.stringify(["a","ab","abc"]));
+assertEquals('{"a":1,"c":true}',
+              JSON.stringify({ a : 1,
+                               b : function() { 1 },
+                               c : true,
+                               d : function() { 2 } }));
+assertEquals('[1,null,true,null]',
+             JSON.stringify([1, function() { 1 }, true, function() { 2 }]));
+assertEquals('"toJSON 123"',
+             JSON.stringify({ toJSON : function() { return 'toJSON 123'; } }));
+assertEquals('{"a":321}',
+             JSON.stringify({ a : { toJSON : function() { return 321; } } }));
+assertEquals('{"getter":123}',
+             JSON.stringify({ get getter() { return 123; } }));
+assertEquals('{"a":"abc","b":"\u1234bc"}',
+             JSON.stringify({ a : "abc", b : "\u1234bc" }));
+
+var a = { a : 1, b : 2 };
+delete a.a;
+assertEquals('{"b":2}', JSON.stringify(a));
+
+var b = {};
+b.__proto__ = { toJSON : function() { return 321;} };
+assertEquals("321", JSON.stringify(b));
+
+var array = [""];
+var expected = '""';
+for (var i = 0; i < 10000; i++) {
+  array.push("");
+  expected = '"",' + expected;
+}
+expected = '[' + expected + ']';
+assertEquals(expected, JSON.stringify(array));
+
 
 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}));
@@ skipping 151 matching lines @@
 // objects in JSON.parse. Instead we read them as we would JS object
 // literals. If we change that, this test should change with it.
 //
 // Parse a non-object value as __proto__. This must not create a
 // __proto__ property different from the original, and should not
 // change the original.
 var o = JSON.parse('{"__proto__":5}');
 assertEquals(Object.prototype, o.__proto__);  // __proto__ isn't changed.
 assertEquals(0, Object.keys(o).length);  // __proto__ isn't added as enumerable.
 
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