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// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.concat
description: >
TypeError is thrown if "length" of result array exceeds 2^53 - 1.
info: |
Array.prototype.concat ( ...arguments )
[...]
5. Repeat, while items is not empty
[...]
c. If spreadable is true, then
[...]
ii. Let len be ? LengthOfArrayLike(E).
iii. If n + len > 2^53 - 1, throw a TypeError exception.
[...]
features: [Symbol.isConcatSpreadable, Proxy]
---*/
var spreadableLengthOutOfRange = {};
spreadableLengthOutOfRange.length = Number.MAX_SAFE_INTEGER;
spreadableLengthOutOfRange[Symbol.isConcatSpreadable] = true;
assert.throws(TypeError, function() {
[1].concat(spreadableLengthOutOfRange);
}, '[1].concat(spreadableLengthOutOfRange) throws a TypeError exception');
var proxyForArrayWithLengthOutOfRange = new Proxy([], {
get: function(_target, key) {
if (key === "length") {
return Number.MAX_SAFE_INTEGER;
}
},
});
assert.throws(TypeError, function() {
[].concat(1, proxyForArrayWithLengthOutOfRange);
}, '[].concat(1, proxyForArrayWithLengthOutOfRange) throws a TypeError exception');
reportCompare(0, 0);
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