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Side by Side Diff: test/mjsunit/harmony/computed-property-names-object-literals-methods.js

Issue 792233008: ES6 computed property names (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 6 years ago
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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 // Flags: --harmony-computed-property-names --harmony-object-literals
6
7
8 function ID(x) {
9 return x;
10 }
11
12
13 (function TestMethodComputedNameString() {
14 var object = {
15 a() { return 'A'},
16 ['b']() { return 'B'; },
17 c() { return 'C'; },
18 [ID('d')]() { return 'D'; },
19 };
20 assertEquals('A', object.a());
21 assertEquals('B', object.b());
22 assertEquals('C', object.c());
23 assertEquals('D', object.d());
24 assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(object));
25 })();
26
27
28 (function TestMethodComputedNameNumber() {
29 var object = {
30 a() { return 'A'; },
31 [1]() { return 'B'; },
32 c() { return 'C'; },
33 [ID(2)]() { return 'D'; },
34 };
35 assertEquals('A', object.a());
36 assertEquals('B', object[1]());
37 assertEquals('C', object.c());
38 assertEquals('D', object[2]());
39 // Array indexes first.
40 assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(object));
41 })();
42
43
44 (function TestMethodComputedNameSymbol() {
45 var sym1 = Symbol();
46 var sym2 = Symbol();
47 var object = {
48 a() { return 'A'; },
49 [sym1]() { return 'B'; },
50 c() { return 'C'; },
51 [ID(sym2)]() { return 'D'; },
52 };
53 assertEquals('A', object.a());
54 assertEquals('B', object[sym1]());
55 assertEquals('C', object.c());
56 assertEquals('D', object[sym2]());
57 assertArrayEquals(['a', 'c'], Object.keys(object));
58 assertArrayEquals([sym1, sym2], Object.getOwnPropertySymbols(object));
59 })();
60
61
62 function assertIteratorResult(value, done, result) {
63 assertEquals({ value: value, done: done}, result);
64 }
65
66
67 (function TestGeneratorComputedName() {
68 var object = {
69 *['a']() {
70 yield 1;
71 yield 2;
72 }
73 };
74 var iter = object.a();
75 assertIteratorResult(1, false, iter.next());
76 assertIteratorResult(2, false, iter.next());
77 assertIteratorResult(undefined, true, iter.next());
78 assertArrayEquals(['a'], Object.keys(object));
79 })();
80
81
82 (function TestToNameSideEffects() {
83 var counter = 0;
84 var key1 = {
85 toString: function() {
86 assertEquals(0, counter++);
87 return 'b';
88 }
89 };
90 var key2 = {
91 toString: function() {
92 assertEquals(1, counter++);
93 return 'd';
94 }
95 };
96 var object = {
97 a() { return 'A'; },
98 [key1]() { return 'B'; },
99 c() { return 'C'; },
100 [key2]() { return 'D'; },
101 };
102 assertEquals(2, counter);
103 assertEquals('A', object.a());
104 assertEquals('B', object.b());
105 assertEquals('C', object.c());
106 assertEquals('D', object.d());
107 assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(object));
108 })();
109
110
111 (function TestDuplicateKeys() {
112 'use strict';
113 // ES5 does not allow duplicate keys.
114 // ES6 does but we haven't changed our code yet.
115
116 var object = {
117 a() { return 1; },
118 ['a']() { return 2; },
119 };
120 assertEquals(2, object.a());
121 })();
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