js/src/tests/ecma_5/Array/reverse-order-of-low-high-accesses.js@6474c204b198
js/src/tests/ecma_5/Array/reverse-order-of-low-high-accesses.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /*
2 * Any copyright is dedicated to the Public Domain.
3 * http://creativecommons.org/licenses/publicdomain/
4 */
6 //-----------------------------------------------------------------------------
7 var BUGNUMBER = 858677;
8 var summary =
9 "[].reverse should swap elements low to high using accesses to low " +
10 "elements, then accesses to high elements";
12 print(BUGNUMBER + ": " + summary);
14 /**************
15 * BEGIN TEST *
16 **************/
18 var observed = [];
20 // (0, 7) hits the lowerExists/upperExists case.
21 // (1, 6) hits the !lowerExists/upperExists case.
22 // (2, 5) hits the lowerExists/!upperExists case.
23 // (3, 4) hits the !lowerExists/!upperExists case.
24 //
25 // It'd be a good idea to have a second version of this test at some point
26 // where the "array" being reversed is a proxy, to detect proper ordering of
27 // getproperty, hasproperty, setproperty into a hole, and deleteproperty from a
28 // non-configurable element. But at present our Array.prototype.reverse
29 // implementation probably doesn't conform fully to all this (because our
30 // internal MOP is still slightly off), so punt for now.
31 var props =
32 {
33 0: {
34 configurable: true,
35 get: function() { observed.push("index 0 get"); return "index 0 get"; },
36 set: function(v) { observed.push("index 0 set: " + v); }
37 },
38 /* 1: hole */
39 2: {
40 configurable: true,
41 get: function() { observed.push("index 2 get"); return "index 2 get"; },
42 set: function(v) { observed.push("index 2 set: " + v); }
43 },
44 /* 3: hole */
45 /* 4: hole */
46 /* 5: hole */
47 6: {
48 configurable: true,
49 get: function() { observed.push("index 6 get"); return "index 6 get"; },
50 set: function(v) { observed.push("index 6 set: " + v); }
51 },
52 7: {
53 configurable: true,
54 get: function() { observed.push("index 7 get"); return "index 7 get"; },
55 set: function(v) { observed.push("index 7 set: " + v); }
56 },
57 };
59 var arr = Object.defineProperties(new Array(8), props);
61 arr.reverse();
63 var expectedObserved =
64 ["index 0 get", "index 7 get", "index 0 set: index 7 get", "index 7 set: index 0 get",
65 "index 6 get",
66 "index 2 get"
67 /* nothing for 3/4 */];
68 print(observed);
69 // Do this before the assertions below futz even more with |observed|.
70 assertEq(observed.length, expectedObserved.length);
71 for (var i = 0; i < expectedObserved.length; i++)
72 assertEq(observed[i], expectedObserved[i]);
74 assertEq(arr[0], "index 0 get"); // no deletion, setting doesn't overwrite
75 assertEq(arr[1], "index 6 get"); // copies result of getter
76 assertEq(2 in arr, false); // deleted
77 assertEq(3 in arr, false); // never there
78 assertEq(4 in arr, false); // never there
79 assertEq(arr[5], "index 2 get"); // copies result of getter
80 assertEq(6 in arr, false); // deleted
81 assertEq(arr[7], "index 7 get"); // no deletion, setter doesn't overwrite
83 /******************************************************************************/
85 if (typeof reportCompare === "function")
86 reportCompare(true, true);
88 print("Tests complete");
