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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-iteration | |
6 | |
7 | |
8 // Note in general that "arguments.foo" and "var o = arguments; o.foo" | |
9 // are treated differently by full-codegen, and so both cases need to be | |
10 // tested. | |
11 | |
12 function TestDirectArgumentsIteratorProperty() { | |
13 assertTrue(arguments.hasOwnProperty(Symbol.iterator)); | |
14 assertFalse(arguments.propertyIsEnumerable(Symbol.iterator)); | |
15 assertEquals(arguments[Symbol.iterator], [].values); | |
16 } | |
17 TestDirectArgumentsIteratorProperty(); | |
18 | |
19 | |
20 function TestIndirectArgumentsIteratorProperty() { | |
21 var o = arguments; | |
22 assertTrue(o.hasOwnProperty(Symbol.iterator)); | |
23 assertFalse(o.propertyIsEnumerable(Symbol.iterator)); | |
24 assertEquals(o[Symbol.iterator], [].values); | |
25 } | |
26 TestIndirectArgumentsIteratorProperty(); | |
27 | |
28 | |
29 function assertIteratorResult(value, done, result) { | |
30 assertEquals({value: value, done: done}, result); | |
31 } | |
32 | |
33 | |
34 function TestDirectValues1(a, b, c) { | |
35 var iterator = arguments[Symbol.iterator](); | |
36 assertIteratorResult(a, false, iterator.next()); | |
37 assertIteratorResult(b, false, iterator.next()); | |
38 assertIteratorResult(c, false, iterator.next()); | |
39 assertIteratorResult(void 0, true, iterator.next()); | |
rossberg
2014/06/26 15:51:53
Nit: no reason to use void 0 instead of undefined
| |
40 } | |
41 TestDirectValues1(1, 2, 3); | |
42 | |
43 | |
44 function TestIndirectValues1(a, b, c) { | |
45 var args = arguments; | |
46 var iterator = args[Symbol.iterator](); | |
47 assertIteratorResult(a, false, iterator.next()); | |
48 assertIteratorResult(b, false, iterator.next()); | |
49 assertIteratorResult(c, false, iterator.next()); | |
50 assertIteratorResult(void 0, true, iterator.next()); | |
51 } | |
52 TestIndirectValues1(1, 2, 3); | |
53 | |
54 | |
55 function TestDirectValues2(a, b, c) { | |
56 var iterator = arguments[Symbol.iterator](); | |
57 assertIteratorResult(a, false, iterator.next()); | |
58 assertIteratorResult(b, false, iterator.next()); | |
59 assertIteratorResult(c, false, iterator.next()); | |
60 assertIteratorResult(void 0, true, iterator.next()); | |
61 | |
62 arguments[3] = 4; | |
63 arguments.length = 4; | |
64 assertIteratorResult(void 0, true, iterator.next()); | |
65 } | |
66 TestDirectValues2(1, 2, 3); | |
67 | |
68 | |
69 function TestIndirectValues2(a, b, c) { | |
70 var args = arguments; | |
71 var iterator = args[Symbol.iterator](); | |
72 assertIteratorResult(a, false, iterator.next()); | |
73 assertIteratorResult(b, false, iterator.next()); | |
74 assertIteratorResult(c, false, iterator.next()); | |
75 assertIteratorResult(void 0, true, iterator.next()); | |
76 | |
77 arguments[3] = 4; | |
78 arguments.length = 4; | |
79 assertIteratorResult(void 0, true, iterator.next()); | |
80 } | |
81 TestIndirectValues2(1, 2, 3); | |
82 | |
83 | |
84 function TestDirectValues3(a, b, c) { | |
85 var iterator = arguments[Symbol.iterator](); | |
86 assertIteratorResult(a, false, iterator.next()); | |
87 assertIteratorResult(b, false, iterator.next()); | |
88 | |
89 arguments.length = 2; | |
90 assertIteratorResult(void 0, true, iterator.next()); | |
91 } | |
92 TestDirectValues3(1, 2, 3); | |
93 | |
94 | |
95 function TestIndirectValues3(a, b, c) { | |
96 var args = arguments; | |
97 var iterator = args[Symbol.iterator](); | |
98 assertIteratorResult(a, false, iterator.next()); | |
99 assertIteratorResult(b, false, iterator.next()); | |
100 | |
101 arguments.length = 2; | |
102 assertIteratorResult(void 0, true, iterator.next()); | |
103 } | |
104 TestIndirectValues3(1, 2, 3); | |
105 | |
106 | |
107 function TestDirectValues4(a, b, c) { | |
108 var iterator = arguments[Symbol.iterator](); | |
109 assertIteratorResult(a, false, iterator.next()); | |
110 assertIteratorResult(b, false, iterator.next()); | |
111 assertIteratorResult(c, false, iterator.next()); | |
112 | |
113 arguments.length = 4; | |
114 assertIteratorResult(void 0, false, iterator.next()); | |
115 assertIteratorResult(void 0, true, iterator.next()); | |
116 } | |
117 TestDirectValues4(1, 2, 3); | |
118 | |
119 | |
120 function TestIndirectValues4(a, b, c) { | |
rossberg
2014/06/26 15:51:52
It would be good to also test that
- changing an
| |
121 var args = arguments; | |
122 var iterator = args[Symbol.iterator](); | |
123 assertIteratorResult(a, false, iterator.next()); | |
124 assertIteratorResult(b, false, iterator.next()); | |
125 assertIteratorResult(c, false, iterator.next()); | |
126 | |
127 arguments.length = 4; | |
128 assertIteratorResult(void 0, false, iterator.next()); | |
129 assertIteratorResult(void 0, true, iterator.next()); | |
130 } | |
131 TestIndirectValues4(1, 2, 3); | |
132 | |
133 | |
134 function TestForOf() { | |
135 var i = 0; | |
136 for (var value of arguments) { | |
137 assertEquals(arguments[i++], value); | |
138 } | |
139 | |
140 assertEquals(arguments.length, i); | |
141 } | |
142 TestForOf(1, 2, 3, 4, 5); | |
143 | |
144 | |
145 function TestAssignmentToIterator() { | |
146 var i = 0; | |
147 arguments[Symbol.iterator] = [].entries; | |
148 for (var entry of arguments) { | |
149 assertEquals([i, arguments[i]], entry); | |
150 i++; | |
151 } | |
152 | |
153 assertEquals(arguments.length, i); | |
154 } | |
155 TestAssignmentToIterator(1, 2, 3, 4, 5); | |
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