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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: --allow-natives-syntax
6
7function test(mode) {
8  var a = [];
9  Object.defineProperty(a, "length", { writable : false});
10
11  function check(f) {
12    try {
13      f(a);
14    } catch(e) { }
15    assertFalse(0 in a);
16    assertEquals(0, a.length);
17  }
18
19  function push(a) {
20    a.push(3);
21  }
22
23  if (mode == "fast properties") %ToFastProperties(a);
24
25  check(push);
26  check(push);
27  check(push);
28  %OptimizeFunctionOnNextCall(push);
29  check(push);
30
31  function unshift(a) {
32    a.unshift(3);
33  }
34
35  check(unshift);
36  check(unshift);
37  check(unshift);
38  %OptimizeFunctionOnNextCall(unshift);
39  check(unshift);
40}
41
42test("fast properties");
43
44test("normalized");
45
46var b = [];
47Object.defineProperty(b.__proto__, "0", {
48  set : function(v) {
49    b.x = v;
50    Object.defineProperty(b, "length", { writable : false });
51  },
52  get: function() {
53    return b.x;
54  }
55});
56
57b = [];
58try {
59  b.push(3, 4, 5);
60} catch(e) { }
61assertFalse(1 in b);
62assertFalse(2 in b);
63assertEquals(0, b.length);
64
65b = [];
66try {
67  b.unshift(3, 4, 5);
68} catch(e) { }
69assertFalse(1 in b);
70assertFalse(2 in b);
71assertEquals(0, b.length);
72
73b = [1, 2];
74try {
75  b.unshift(3, 4, 5);
76} catch(e) { }
77assertEquals(3, b[0]);
78assertEquals(4, b[1]);
79assertEquals(5, b[2]);
80assertEquals(1, b[3]);
81assertEquals(2, b[4]);
82assertEquals(5, b.length);
83
84b = [1, 2];
85
86Object.defineProperty(b.__proto__, "4", {
87  set : function(v) {
88    b.z = v;
89    Object.defineProperty(b, "length", { writable : false });
90  },
91  get: function() {
92    return b.z;
93  }
94});
95
96try {
97  b.unshift(3, 4, 5);
98} catch(e) { }
99
100// TODO(ulan): According to the ECMA-262 unshift should throw an exception
101// when moving b[0] to b[3] (see 15.4.4.13 step 6.d.ii). This is difficult
102// to do with our current implementation of SmartMove() in src/array.js and
103// it will regress performance. Uncomment the following line once acceptable
104// solution is found:
105// assertFalse(2 in b);
106// assertFalse(3 in b);
107// assertEquals(2, b.length);
108