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23
24description(
25'This test checks lastIndexOf for various values in an array'
26);
27
28
29var testArray = [2, 5, 9, 2];
30var lastIndex = 0;
31
32lastIndex = testArray.lastIndexOf(2,-500);
33shouldBe('lastIndex', '-1');
34lastIndex = testArray.lastIndexOf(9,500);
35shouldBe('lastIndex', '2');
36lastIndex = testArray.lastIndexOf(2);
37shouldBe('lastIndex', '3');
38lastIndex = testArray.lastIndexOf(7);
39shouldBe('lastIndex', '-1');
40lastIndex = testArray.lastIndexOf(2, 3);
41shouldBe('lastIndex', '3');
42lastIndex = testArray.lastIndexOf(2, 2);
43shouldBe('lastIndex', '0');
44lastIndex = testArray.lastIndexOf(2, -2);
45shouldBe('lastIndex', '0');
46lastIndex = testArray.lastIndexOf(2, -1);
47shouldBe('lastIndex', '3');
48
49delete testArray[1];
50
51lastIndex = testArray.lastIndexOf(undefined);
52shouldBe('lastIndex', '-1');
53
54delete testArray[3];
55
56lastIndex = testArray.lastIndexOf(undefined);
57shouldBe('lastIndex', '-1');
58
59testArray = new Array(20);
60
61lastIndex = testArray.lastIndexOf(undefined);
62shouldBe('lastIndex', '-1');
63
64testArray[19] = undefined;
65
66lastIndex = testArray.lastIndexOf(undefined);
67shouldBe('lastIndex', '19');
68
69lastIndex = testArray.lastIndexOf(undefined, 18);
70shouldBe('lastIndex', '-1');
71
72delete testArray[19];
73
74lastIndex = testArray.lastIndexOf(undefined);
75shouldBe('lastIndex', '-1');
76