1 // Copyright 2014 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Properties are serialized once. 6 assertEquals('{"x":1}', JSON.stringify({ x : 1 }, ["x", 1, "x", 1])); 7 assertEquals('{"1":1}', JSON.stringify({ 1 : 1 }, ["x", 1, "x", 1])); 8 assertEquals('{"1":1}', JSON.stringify({ 1 : 1 }, ["1", 1, "1", 1])); 9 assertEquals('{"1":1}', JSON.stringify({ 1 : 1 }, [1, "1", 1, "1"])); 10 11 // Properties are visited at most once. 12 var fired = 0; 13 var getter_obj = { get x() { fired++; return 2; } }; 14 assertEquals('{"x":2}', JSON.stringify(getter_obj, ["x", "y", "x"])); 15 assertEquals(1, fired); 16 17 // Order of the replacer array is followed. 18 assertEquals('{"y":4,"x":3}', JSON.stringify({ x : 3, y : 4}, ["y", "x"])); 19 assertEquals('{"y":4,"1":2,"x":3}', 20 JSON.stringify({ x : 3, y : 4, 1 : 2 }, ["y", 1, "x"])); 21 22 // With a replacer array the value of the property is retrieved using [[Get]] 23 // ignoring own and enumerability. 24 var a = { x : 8 }; 25 assertEquals('{"__proto__":{"__proto__":null},"x":8}', 26 JSON.stringify(a, ["__proto__", "x", "__proto__"])); 27 a.__proto__ = { x : 7 }; 28 assertEquals('{"__proto__":{"__proto__":{"__proto__":null},"x":7},"x":8}', 29 JSON.stringify(a, ["__proto__", "x"])); 30 var b = { __proto__: { x: 9 } }; 31 assertEquals('{}', JSON.stringify(b)); 32 assertEquals('{"x":9}', JSON.stringify(b, ["x"])); 33 var c = {x: 10}; 34 Object.defineProperty(c, 'x', { enumerable: false }); 35 assertEquals('{}', JSON.stringify(c)); 36 assertEquals('{"x":10}', JSON.stringify(c, ["x"])); 37 38 // Arrays are not affected by the replacer array. 39 assertEquals("[9,8,7]", JSON.stringify([9, 8, 7], [1, 1])); 40 var mixed_arr = [11,12,13]; 41 mixed_arr.x = 10; 42 assertEquals('[11,12,13]', JSON.stringify(mixed_arr, [1, 0, 1])); 43 44 // Array elements of objects are affected. 45 var mixed_obj = { x : 3 }; 46 mixed_obj[0] = 6; 47 mixed_obj[1] = 5; 48 assertEquals('{"1":5,"0":6}', JSON.stringify(mixed_obj, [1, 0, 1])); 49 50 // Nested object. 51 assertEquals('{"z":{"x":3},"x":1}', 52 JSON.stringify({ x: 1, y:2, z: {x:3, b:4}}, ["z","x"])); 53 54 // Objects in the replacer array are ignored. 55 assertEquals('{}', 56 JSON.stringify({ x : 1, "1": 1 }, [{}])); 57 assertEquals('{}', 58 JSON.stringify({ x : 1, "1": 1 }, [true, undefined, null])); 59 assertEquals('{}', 60 JSON.stringify({ x : 1, "1": 1 }, 61 [{ toString: function() { return "x";} }])); 62 assertEquals('{}', 63 JSON.stringify({ x : 1, "1": 1 }, 64 [{ valueOf: function() { return 1;} }])); 65 66 // Make sure that property names that clash with the names of Object.prototype 67 // still works. 68 assertEquals('{"toString":42}', JSON.stringify({ toString: 42 }, ["toString"])); 69 70 // Number wrappers and String wrappers should be unwrapped. 71 assertEquals('{"1":1,"s":"s"}', 72 JSON.stringify({ 1: 1, s: "s" }, 73 [new Number(1), new String("s")])); 74
