js/src/tests/ecma_5/Array/length-truncate-nonconfigurable-sparse.js@6474c204b198
js/src/tests/ecma_5/Array/length-truncate-nonconfigurable-sparse.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 * Contributor:
5 * Jeff Walden <jwalden+code@mit.edu>
6 */
8 //-----------------------------------------------------------------------------
9 var BUGNUMBER = 858381;
10 var summary =
11 "Array length redefinition behavior with non-configurable elements";
13 print(BUGNUMBER + ": " + summary);
15 /**************
16 * BEGIN TEST *
17 **************/
19 function addDataProperty(obj, prop, value, enumerable, configurable, writable)
20 {
21 var desc =
22 { enumerable: enumerable,
23 configurable: configurable,
24 writable: writable,
25 value: value };
26 Object.defineProperty(obj, prop, desc);
27 }
29 function nonstrict()
30 {
31 var arr = [0, , 2, , , 5];
33 addDataProperty(arr, 31415926, "foo", true, true, true);
34 addDataProperty(arr, 123456789, "bar", true, true, false);
35 addDataProperty(arr, 8675309, "qux", false, true, true);
36 addDataProperty(arr, 1735039, "eit", false, true, false);
37 addDataProperty(arr, 987654321, "fun", false, true, false);
39 // non-array indexes to spice things up
40 addDataProperty(arr, "foopy", "sdfsd", false, false, false);
41 addDataProperty(arr, 4294967296, "psych", true, false, false);
42 addDataProperty(arr, 4294967295, "psych", true, false, false);
44 addDataProperty(arr, 27182818, "eep", false, false, false);
46 // Truncate...but only as far as possible.
47 arr.length = 1;
49 assertEq(arr.length, 27182819);
51 var props = Object.getOwnPropertyNames(arr).sort();
52 var expected =
53 ["0", "2", "5", "1735039", "8675309", "27182818",
54 "foopy", "4294967296", "4294967295", "length"].sort();
56 assertEq(props.length, expected.length);
57 for (var i = 0; i < props.length; i++)
58 assertEq(props[i], expected[i], "unexpected property: " + props[i]);
59 }
60 nonstrict();
62 function strict()
63 {
64 "use strict";
66 var arr = [0, , 2, , , 5];
68 addDataProperty(arr, 31415926, "foo", true, true, true);
69 addDataProperty(arr, 123456789, "bar", true, true, false);
70 addDataProperty(arr, 8675309, "qux", false, true, true);
71 addDataProperty(arr, 1735039, "eit", false, true, false);
72 addDataProperty(arr, 987654321, "fun", false, true, false);
74 // non-array indexes to spice things up
75 addDataProperty(arr, "foopy", "sdfsd", false, false, false);
76 addDataProperty(arr, 4294967296, "psych", true, false, false);
77 addDataProperty(arr, 4294967295, "psych", true, false, false);
79 addDataProperty(arr, 27182818, "eep", false, false, false);
81 try
82 {
83 arr.length = 1;
84 throw new Error("didn't throw?!");
85 }
86 catch (e)
87 {
88 assertEq(e instanceof TypeError, true,
89 "non-configurable property should trigger TypeError, got " + e);
90 }
92 assertEq(arr.length, 27182819);
94 var props = Object.getOwnPropertyNames(arr).sort();
95 var expected =
96 ["0", "2", "5", "1735039", "8675309", "27182818",
97 "foopy", "4294967296", "4294967295", "length"].sort();
99 assertEq(props.length, expected.length);
100 for (var i = 0; i < props.length; i++)
101 assertEq(props[i], expected[i], "unexpected property: " + props[i]);
102 }
103 strict();
105 /******************************************************************************/
107 if (typeof reportCompare === "function")
108 reportCompare(true, true);
110 print("Tests complete");
