blob: 07fc5da7266fb0d5cddc434f4d5e1e1b5b5a888e (
plain)
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
|
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-%typedarray%.prototype.lastindexof
description: Returns -1 if length is 0
info: |
22.2.3.17 %TypedArray%.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
%TypedArray%.prototype.lastIndexOf is a distinct function that implements the
same algorithm as Array.prototype.lastIndexOf as defined in 22.1.3.15 except
that the this object's [[ArrayLength]] internal slot is accessed in place of
performing a [[Get]] of "length".
22.1.3.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
...
2. Let len be ? ToLength(? Get(O, "length")).
3. If len is 0, return -1.
...
includes: [testBigIntTypedArray.js]
features: [BigInt, TypedArray]
---*/
var fromIndex = {
valueOf: function() {
throw new Test262Error();
}
};
testWithBigIntTypedArrayConstructors(function(TA) {
var sample = new TA();
assert.sameValue(sample.lastIndexOf(0), -1, "returns -1");
assert.sameValue(
sample.lastIndexOf(0, fromIndex), -1,
"length is checked before ToInteger(fromIndex)"
);
});
|
