diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js b/js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js new file mode 100644 index 0000000000..56811d9ca8 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/includes/length-boundaries.js @@ -0,0 +1,85 @@ +// 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); |