From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- .../tests/non262/Array/concat-spreadable-basic.js | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 js/src/tests/non262/Array/concat-spreadable-basic.js (limited to 'js/src/tests/non262/Array/concat-spreadable-basic.js') 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); -- cgit v1.2.3