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// 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-array.prototype.includes
description: length boundaries from ToLength operation
info: |
22.1.3.11 Array.prototype.includes ( searchElement [ , fromIndex ] )
...
2. Let len be ? ToLength(? Get(O, "length")).
...
7.1.15 ToLength ( argument )
1. Let len be ? ToInteger(argument).
2. If len ≤ +0, return +0.
3. If len is +∞, return 2**53-1.
4. Return min(len, 2**53-1).
features: [Array.prototype.includes]
---*/
var obj = {
"0": "a",
"1": "b",
"9007199254740990": "c", // 2 ** 53 - 2
"9007199254740991": "d", // 2 ** 53 - 1
"9007199254740992": "e", // 2 ** 53
};
obj.length = -0;
assert.sameValue([].includes.call(obj, "a"), false, "-0");
obj.length = -1;
assert.sameValue([].includes.call(obj, "a"), false, "-1");
obj.length = -0.1;
assert.sameValue([].includes.call(obj, "a"), false, "-0.1");
obj.length = -Infinity;
assert.sameValue([].includes.call(obj, "a"), false, "-Infinity");
var fromIndex = 9007199254740990;
obj.length = 9007199254740991;
assert.sameValue(
[].includes.call(obj, "c", fromIndex),
true,
"2**53-1, found value at 2**53-2"
);
obj.length = 9007199254740991;
assert.sameValue(
[].includes.call(obj, "d", fromIndex),
false,
"2**53-1, ignores indexes >= 2**53-1"
);
obj.length = 9007199254740992;
assert.sameValue(
[].includes.call(obj, "d", fromIndex),
false,
"2**53, ignores indexes >= 2**53-1"
);
obj.length = 9007199254740993;
assert.sameValue(
[].includes.call(obj, "d", fromIndex),
false,
"2**53+1, ignores indexes >= 2**53-1"
);
obj.length = Infinity;
assert.sameValue(
[].includes.call(obj, "c", fromIndex),
true,
"Infinity, found item"
);
assert.sameValue(
[].includes.call(obj, "d", fromIndex),
false,
"Infinity, ignores indexes >= 2**53-1"
);
reportCompare(0, 0);
|
