1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
// Copyright (C) 2021 Microsoft. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.findlast
description: >
Change values during predicate call
info: |
%TypedArray%.prototype.findLast (predicate [ , thisArg ] )
5. Let k be len - 1.
6. Repeat, while k ≥ 0,
...
c. Let testResult be ! ToBoolean(? Call(predicate, thisArg, « kValue, 𝔽(k), O »)).
...
includes: [compareArray.js, testTypedArray.js]
features: [TypedArray, array-find-from-last]
---*/
testWithTypedArrayConstructors(function(TA) {
var arr = [1, 2, 3];
var sample;
var result;
sample = new TA(3);
sample.findLast(function(val, i) {
sample[i] = arr[i];
assert.sameValue(val, 0, "value is not mapped to instance");
});
assert(compareArray(sample, arr), "values set during each predicate call");
sample = new TA(arr);
result = sample.findLast(function(val, i) {
if ( i === 2 ) {
sample[0] = 7;
}
return val === 7;
});
assert.sameValue(result, 7, "value found");
sample = new TA(arr);
result = sample.findLast(function(val, i) {
if ( i === 2 ) {
sample[0] = 7;
}
return val === 1;
});
assert.sameValue(result, undefined, "value not found");
sample = new TA(arr);
result = sample.findLast(function(val, i) {
if ( i < 2 ) {
sample[2] = 7;
}
return val === 7;
});
assert.sameValue(result, undefined, "value not found - changed after call");
sample = new TA(arr);
result = sample.findLast(function() {
sample[2] = 7;
return true;
});
assert.sameValue(result, 3, "findLast() returns previous found value");
});
reportCompare(0, 0);
|
