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
|
// Copyright (C) 2021 Microsoft. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.findlastindex
description: >
Return index if predicate return a boolean true value.
info: |
%TypedArray%.prototype.findLastIndex ( 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 »)).
d. If testResult is true, return 𝔽(k).
...
includes: [testBigIntTypedArray.js]
features: [BigInt, Symbol, TypedArray, array-find-from-last]
---*/
testWithBigIntTypedArrayConstructors(function(TA) {
var sample = new TA([39n, 3n, 9n]);
var called = 0;
var result = sample.findLastIndex(function() {
called++;
return true;
});
assert.sameValue(result, 2, "returned true on sample[2]");
assert.sameValue(called, 1, "predicate was called once");
called = 0;
result = sample.findLastIndex(function(val) {
called++;
return val === 39n;
});
assert.sameValue(called, 3, "predicate was called three times");
assert.sameValue(result, 0, "returned true on sample[0]");
result = sample.findLastIndex(function() { return "string"; });
assert.sameValue(result, 2, "ToBoolean(string)");
result = sample.findLastIndex(function() { return {}; });
assert.sameValue(result, 2, "ToBoolean(object)");
result = sample.findLastIndex(function() { return Symbol(""); });
assert.sameValue(result, 2, "ToBoolean(symbol)");
result = sample.findLastIndex(function() { return 1; });
assert.sameValue(result, 2, "ToBoolean(number)");
result = sample.findLastIndex(function() { return -1; });
assert.sameValue(result, 2, "ToBoolean(negative number)");
});
reportCompare(0, 0);
|
