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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/tests/non262/Array/concat-spreadable-basic.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/Array/concat-spreadable-basic.js | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/non262/Array/concat-spreadable-basic.js b/js/src/tests/non262/Array/concat-spreadable-basic.js new file mode 100644 index 0000000000..c13f8f5cd3 --- /dev/null +++ b/js/src/tests/non262/Array/concat-spreadable-basic.js @@ -0,0 +1,37 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ +"use strict"; + +const x = Object.freeze([1, 2, 3]); + +let fakeArray = { + [Symbol.isConcatSpreadable]: true, + length: 2, + 0: "hello", + 1: "world" +} +assertDeepEq(x.concat(fakeArray), [1, 2, 3, "hello", "world"]); +assertDeepEq(x.concat(fakeArray, fakeArray), [1, 2, 3, "hello", "world", "hello", "world"]); + +for (let truthy of [true, 3.41, "abc", Symbol(), {}]) { + let obj = {[Symbol.isConcatSpreadable]: truthy, length: 1, 0: "hey"} + assertDeepEq(x.concat(obj), [1, 2, 3, "hey"]); +} + +for (let notTruthy of [null, undefined, false, 0, NaN, ""]) { + let obj = {[Symbol.isConcatSpreadable]: notTruthy, length: 1, 0: "hey"} + assertDeepEq(x.concat(obj), [1, 2, 3, obj]); +} + +let array = [5, 4]; +assertDeepEq(x.concat(array), [1, 2, 3, 5, 4]); + +// Can make arrays non-spreadable +array[Symbol.isConcatSpreadable] = false; +assertDeepEq(x.concat(array), [1, 2, 3, [5, 4]]); + +// Explicitly spreadable +array[Symbol.isConcatSpreadable] = true; +assertDeepEq(x.concat(array), [1, 2, 3, 5, 4]); + +reportCompare(true, true); |