diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js b/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js new file mode 100644 index 0000000000..115de6fd58 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/slice/length-exceeding-integer-limit-proxied-array.js @@ -0,0 +1,59 @@ +// Copyright (C) 2017 André Bargull. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-array.prototype.slice +description: > + Length property is clamped to 2^53-1, test with indices near 2^53-1 and negative indices + and a proxy to an array. +info: | + ... + 2. Let len be ? ToLength(? Get(O, "length")). + 3. Let relativeStart be ? ToInteger(start). + 4. If relativeStart < 0, let k be max((len + relativeStart), 0); + else let k be min(relativeStart, len). + 5. If end is undefined, let relativeEnd be len; else let relativeEnd be ? ToInteger(end). + 6. If relativeEnd < 0, let final be max((len + relativeEnd), 0); + else let final be min(relativeEnd, len). + ... +includes: [compareArray.js] +features: [exponentiation] +---*/ + +var array = []; +array["9007199254740988"] = "9007199254740988"; +array["9007199254740989"] = "9007199254740989"; +array["9007199254740990"] = "9007199254740990"; +array["9007199254740991"] = "9007199254740991"; + +// Create a proxy to an array object, so IsArray returns true, but we can still +// return a length value exceeding the integer limit. +var proxy = new Proxy(array, { + get(t, pk, r) { + if (pk === "length") + return 2 ** 53 + 2; + return Reflect.get(t, pk, r); + } +}); + +var result = Array.prototype.slice.call(proxy, 9007199254740989); +assert.compareArray(result, ["9007199254740989", "9007199254740990"], + 'The value of result is expected to be ["9007199254740989", "9007199254740990"]'); + +var result = Array.prototype.slice.call(proxy, 9007199254740989, 9007199254740990); +assert.compareArray(result, ["9007199254740989"], + 'The value of result is expected to be ["9007199254740989"]'); + +var result = Array.prototype.slice.call(proxy, 9007199254740989, 9007199254740996); +assert.compareArray(result, ["9007199254740989", "9007199254740990"], + 'The value of result is expected to be ["9007199254740989", "9007199254740990"]'); + +var result = Array.prototype.slice.call(proxy, -2); +assert.compareArray(result, ["9007199254740989", "9007199254740990"], + 'The value of result is expected to be ["9007199254740989", "9007199254740990"]'); + +var result = Array.prototype.slice.call(proxy, -2, -1); +assert.compareArray(result, ["9007199254740989"], + 'The value of result is expected to be ["9007199254740989"]'); + +reportCompare(0, 0); |