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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// 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.copywithin
description: >
start argument is coerced to an integer value.
info: |
22.2.3.5 %TypedArray%.prototype.copyWithin (target, start [ , end ] )
%TypedArray%.prototype.copyWithin is a distinct function that implements the
same algorithm as Array.prototype.copyWithin as defined in 22.1.3.3 except
that the this object's [[ArrayLength]] internal slot is accessed in place of
performing a [[Get]] of "length" and the actual copying of values in step 12
must be performed in a manner that preserves the bit-level encoding of the
source data.
...
22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
...
5. Let relativeStart be ? ToInteger(start).
...
includes: [compareArray.js, testBigIntTypedArray.js]
features: [BigInt, TypedArray]
---*/
testWithBigIntTypedArrayConstructors(function(TA) {
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(1, undefined),
[0n, 0n, 1n, 2n]
),
'undefined value coerced to 0'
);
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(1, false),
[0n, 0n, 1n, 2n]
),
'false value coerced to 0'
);
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(1, NaN),
[0n, 0n, 1n, 2n]
),
'NaN value coerced to 0'
);
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(1, null),
[0n, 0n, 1n, 2n]
),
'null value coerced to 0'
);
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(0, true),
[1n, 2n, 3n, 3n]
),
'true value coerced to 1'
);
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(0, '1'),
[1n, 2n, 3n, 3n]
),
'string "1" value coerced to 1'
);
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(1, 0.5),
[0n, 0n, 1n, 2n]
),
'0.5 float value coerced to integer 0'
);
assert(
compareArray(
new TA([0n, 1n, 2n, 3n]).copyWithin(0, 1.5),
[1n, 2n, 3n, 3n]
),
'1.5 float value coerced to integer 1'
);
});
reportCompare(0, 0);
|