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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js b/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js new file mode 100644 index 0000000000..3e997498e9 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/concat/arg-length-exceeding-integer-limit.js @@ -0,0 +1,42 @@ +// 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); |