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Issue 1403633007: Remove stale references to --harmony-arrays flag in mjsunit tests (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 2 months 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 // Based on Mozilla Array.of() tests at http://dxr.mozilla.org/mozilla-central/s ource/js/src/jit-test/tests/collections
6
7 // Flags: --harmony-arrays
8
9
10
11 // Array.of makes real arrays.
12
13 function check(a) {
14 assertEquals(Object.getPrototypeOf(a), Array.prototype);
15 assertEquals(Array.isArray(a), true);
16 a[9] = 9;
17 assertEquals(a.length, 10);
18 }
19
20
21 check(Array.of());
22 check(Array.of(0));
23 check(Array.of(0, 1, 2));
24 var f = Array.of;
25 check(f());
26
27
28 // Array.of basics
29
30 var a = Array.of();
31
32 assertEquals(a.length, 0);
33 a = Array.of(undefined, null, 3.14, []);
34 assertEquals(a, [undefined, null, 3.14, []]);
35 a = [];
36 for (var i = 0; i < 1000; i++)
37 a[i] = i;
38 assertEquals(Array.of.apply(null, a), a);
39
40
41 // Array.of does not leave holes
42
43 assertEquals(Array.of(undefined), [undefined]);
44 assertEquals(Array.of(undefined, undefined), [undefined, undefined]);
45 assertEquals(Array.of.apply(null, [,,undefined]), [undefined, undefined, undefin ed]);
46 assertEquals(Array.of.apply(null, Array(4)), [undefined, undefined, undefined, u ndefined]);
47
48
49 // Array.of can be transplanted to other classes.
50
51 var hits = 0;
52 function Bag() {
53 hits++;
54 }
55 Bag.of = Array.of;
56
57 hits = 0;
58 var actual = Bag.of("zero", "one");
59 assertEquals(hits, 1);
60
61 hits = 0;
62 var expected = new Bag;
63 expected[0] = "zero";
64 expected[1] = "one";
65 expected.length = 2;
66 assertEquals(areSame(actual, expected), true);
67
68 hits = 0;
69 actual = Array.of.call(Bag, "zero", "one");
70 assertEquals(hits, 1);
71 assertEquals(areSame(actual, expected), true);
72
73 function areSame(object, array) {
74 var result = object.length == array.length;
75 for (var i = 0; i < object.length; i++) {
76 result = result && object[i] == array[i];
77 }
78 return result;
79 }
80
81
82 // Array.of does not trigger prototype setters.
83 // (It defines elements rather than assigning to them.)
84
85 var status = "pass";
86 Object.defineProperty(Array.prototype, "0", {set: function(v) {status = "FAIL 1" }});
87 assertEquals(Array.of(1)[0], 1);
88 assertEquals(status, "pass");
89
90 Object.defineProperty(Bag.prototype, "0", {set: function(v) {status = "FAIL 2"}} );
91 assertEquals(Bag.of(1)[0], 1);
92 assertEquals(status, "pass");
93
94
95 // Array.of passes the number of arguments to the constructor it calls.
96
97 var hits = 0;
98
99 function Herd(n) {
100 assertEquals(arguments.length, 1);
101 assertEquals(n, 5);
102 hits++;
103 }
104
105 Herd.of = Array.of;
106 Herd.of("sheep", "cattle", "elephants", "whales", "seals");
107 assertEquals(hits, 1);
108
109
110 // Array.of calls a "length" setter if one is present.
111
112 var hits = 0;
113 var lastObj = null, lastVal = undefined;
114 function setter(v) {
115 hits++;
116 lastObj = this;
117 lastVal = v;
118 }
119
120 // when the setter is on the new object
121 function Pack() {
122 Object.defineProperty(this, "length", {set: setter});
123 }
124 Pack.of = Array.of;
125 var pack = Pack.of("wolves", "cards", "cigarettes", "lies");
126 assertEquals(lastObj, pack);
127 assertEquals(lastVal, 4);
128
129 // when the setter is on the new object's prototype
130 function Bevy() {}
131 Object.defineProperty(Bevy.prototype, "length", {set: setter});
132 Bevy.of = Array.of;
133 var bevy = Bevy.of("quail");
134 assertEquals(lastObj, bevy);
135 assertEquals(lastVal, 1);
136
137
138 // Array.of does a strict assignment to the new object's .length.
139 // The assignment is strict even if the code we're calling from is not strict.
140
141 function Empty() {}
142 Empty.of = Array.of;
143 Object.defineProperty(Empty.prototype, "length", {get: function() { return 0; }} );
144
145 var nothing = new Empty;
146 nothing.length = 2; // no exception; this is not a strict mode assignment
147
148 assertThrows(function() { Empty.of(); }, TypeError);
149
150
151 // Check superficial features of Array.of.
152
153 var desc = Object.getOwnPropertyDescriptor(Array, "of");
154
155 assertEquals(desc.configurable, true);
156 assertEquals(desc.enumerable, false);
157 assertEquals(desc.writable, true);
158 assertEquals(Array.of.length, 0);
159 assertThrows(function() { new Array.of() }, TypeError); // not a constructor
160
161 // When the this-value passed in is not a constructor, the result is an array.
162 [
163 undefined,
164 null,
165 false,
166 "cow",
167 NaN,
168 67,
169 Infinity,
170 -Infinity,
171 Math.cos, // builtin functions with no [[Construct]] slot
172 Math.cos.bind(Math) // bound builtin functions with no [[Construct]] slot
173 ].forEach(function(val) {
174 assertEquals(Array.isArray(Array.of.call(val, val)), true);
175 });
176
177
178 (function testBoundConstructor() {
179 var boundFn = (function() {}).bind(null);
180 var instance = Array.of.call(boundFn, 1, 2, 3);
181 assertEquals(instance.length, 3);
182 assertEquals(instance instanceof boundFn, true);
183 assertEquals(Array.isArray(instance), false);
184 })();
185
186 (function testDefinesOwnProperty() {
187 // Assert that [[DefineOwnProperty]] is used in ArrayFrom, meaning a
188 // setter isn't called, and a failed [[DefineOwnProperty]] will throw.
189 var setterCalled = 0;
190 function exotic() {
191 Object.defineProperty(this, '0', {
192 get: function() { return 2; },
193 set: function() { setterCalled++; }
194 });
195 }
196 // Non-configurable properties can't be overwritten with DefineOwnProperty
197 assertThrows(function () { Array.of.call(exotic, 1); }, TypeError);
198 // The setter wasn't called
199 assertEquals(0, setterCalled);
200
201 // Check that array properties defined are writable, enumerable, configurable
202 function ordinary() { }
203 var x = Array.of.call(ordinary, 2);
204 var xlength = Object.getOwnPropertyDescriptor(x, 'length');
205 assertEquals(1, xlength.value);
206 assertEquals(true, xlength.writable);
207 assertEquals(true, xlength.enumerable);
208 assertEquals(true, xlength.configurable);
209 var x0 = Object.getOwnPropertyDescriptor(x, 0);
210 assertEquals(2, x0.value);
211 assertEquals(true, xlength.writable);
212 assertEquals(true, xlength.enumerable);
213 assertEquals(true, xlength.configurable);
214 })();
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