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

Issue 807033003: Revert of 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
6
7
8 function ID(x) {
9 return x;
10 }
11
12
13
14 (function TestBasicsString() {
15 var object = {
16 a: 'A',
17 ['b']: 'B',
18 c: 'C',
19 [ID('d')]: 'D',
20 };
21 assertEquals('A', object.a);
22 assertEquals('B', object.b);
23 assertEquals('C', object.c);
24 assertEquals('D', object.d);
25 assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(object));
26 })();
27
28
29 (function TestBasicsNumber() {
30 var object = {
31 a: 'A',
32 [1]: 'B',
33 c: 'C',
34 [ID(2)]: 'D',
35 };
36 assertEquals('A', object.a);
37 assertEquals('B', object[1]);
38 assertEquals('C', object.c);
39 assertEquals('D', object[2]);
40 // Array indexes first.
41 assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(object));
42 })();
43
44
45 (function TestBasicsSymbol() {
46 var sym1 = Symbol();
47 var sym2 = Symbol();
48 var object = {
49 a: 'A',
50 [sym1]: 'B',
51 c: 'C',
52 [ID(sym2)]: 'D',
53 };
54 assertEquals('A', object.a);
55 assertEquals('B', object[sym1]);
56 assertEquals('C', object.c);
57 assertEquals('D', object[sym2]);
58 assertArrayEquals(['a', 'c'], Object.keys(object));
59 assertArrayEquals([sym1, sym2], Object.getOwnPropertySymbols(object));
60 })();
61
62
63 (function TestToNameSideEffects() {
64 var counter = 0;
65 var key1 = {
66 toString: function() {
67 assertEquals(0, counter++);
68 return 'b';
69 }
70 };
71 var key2 = {
72 toString: function() {
73 assertEquals(1, counter++);
74 return 'd';
75 }
76 };
77 var object = {
78 a: 'A',
79 [key1]: 'B',
80 c: 'C',
81 [key2]: 'D',
82 };
83 assertEquals(2, counter);
84 assertEquals('A', object.a);
85 assertEquals('B', object.b);
86 assertEquals('C', object.c);
87 assertEquals('D', object.d);
88 assertArrayEquals(['a', 'b', 'c', 'd'], Object.keys(object));
89 })();
90
91
92 (function TestToNameSideEffectsNumbers() {
93 var counter = 0;
94 var key1 = {
95 valueOf: function() {
96 assertEquals(0, counter++);
97 return 1;
98 },
99 toString: null
100 };
101 var key2 = {
102 valueOf: function() {
103 assertEquals(1, counter++);
104 return 2;
105 },
106 toString: null
107 };
108
109 var object = {
110 a: 'A',
111 [key1]: 'B',
112 c: 'C',
113 [key2]: 'D',
114 };
115 assertEquals(2, counter);
116 assertEquals('A', object.a);
117 assertEquals('B', object[1]);
118 assertEquals('C', object.c);
119 assertEquals('D', object[2]);
120 // Array indexes first.
121 assertArrayEquals(['1', '2', 'a', 'c'], Object.keys(object));
122 })();
123
124
125 (function TestDoubleName() {
126 var object = {
127 [1.2]: 'A',
128 [1e55]: 'B',
129 [0.000001]: 'C',
130 [-0]: 'D',
131 [Infinity]: 'E',
132 [-Infinity]: 'F',
133 [NaN]: 'G',
134 };
135 assertEquals('A', object['1.2']);
136 assertEquals('B', object['1e+55']);
137 assertEquals('C', object['0.000001']);
138 assertEquals('D', object[0]);
139 assertEquals('E', object[Infinity]);
140 assertEquals('F', object[-Infinity]);
141 assertEquals('G', object[NaN]);
142 })();
143
144
145 (function TestGetter() {
146 var object = {
147 get ['a']() {
148 return 'A';
149 }
150 };
151 assertEquals('A', object.a);
152
153 object = {
154 get b() {
155 assertUnreachable();
156 },
157 get ['b']() {
158 return 'B';
159 }
160 };
161 assertEquals('B', object.b);
162
163 object = {
164 get c() {
165 assertUnreachable();
166 },
167 get ['c']() {
168 assertUnreachable();
169 },
170 get ['c']() {
171 return 'C';
172 }
173 };
174 assertEquals('C', object.c);
175
176 object = {
177 get ['d']() {
178 assertUnreachable();
179 },
180 get d() {
181 return 'D';
182 }
183 };
184 assertEquals('D', object.d);
185 })();
186
187
188 (function TestSetter() {
189 var calls = 0;
190 var object = {
191 set ['a'](_) {
192 calls++;
193 }
194 };
195 object.a = 'A';
196 assertEquals(1, calls);
197
198 calls = 0;
199 object = {
200 set b(_) {
201 assertUnreachable();
202 },
203 set ['b'](_) {
204 calls++;
205 }
206 };
207 object.b = 'B';
208 assertEquals(1, calls);
209
210 calls = 0;
211 object = {
212 set c(_) {
213 assertUnreachable()
214 },
215 set ['c'](_) {
216 assertUnreachable()
217 },
218 set ['c'](_) {
219 calls++
220 }
221 };
222 object.c = 'C';
223 assertEquals(1, calls);
224
225 calls = 0;
226 object = {
227 set ['d'](_) {
228 assertUnreachable()
229 },
230 set d(_) {
231 calls++
232 }
233 };
234 object.d = 'D';
235 assertEquals(1, calls);
236 })();
237
238
239 (function TestDuplicateKeys() {
240 'use strict';
241 // ES5 does not allow duplicate keys.
242 // ES6 does but we haven't changed our code yet.
243
244 var object = {
245 a: 1,
246 ['a']: 2,
247 };
248 assertEquals(2, object.a);
249 })();
250
251
252 (function TestProto() {
253 var proto = {};
254 var object = {
255 __proto__: proto
256 };
257 assertEquals(proto, Object.getPrototypeOf(object));
258
259 object = {
260 '__proto__': proto
261 };
262 assertEquals(proto, Object.getPrototypeOf(object));
263
264 var object = {
265 ['__proto__']: proto
266 };
267 assertEquals(Object.prototype, Object.getPrototypeOf(object));
268 assertEquals(proto, object.__proto__);
269 assertTrue(object.hasOwnProperty('__proto__'));
270 })();
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