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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /js/src/tests/non262/Array/concat-spreadable-primitive.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/tests/non262/Array/concat-spreadable-primitive.js')
-rw-r--r-- | js/src/tests/non262/Array/concat-spreadable-primitive.js | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/non262/Array/concat-spreadable-primitive.js b/js/src/tests/non262/Array/concat-spreadable-primitive.js new file mode 100644 index 0000000000..d2264bfa2a --- /dev/null +++ b/js/src/tests/non262/Array/concat-spreadable-primitive.js @@ -0,0 +1,34 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ +"use strict"; + +// Primitive values should never be tried to spread +let primitives = [ + 10, + false, + Symbol() + // Can't change String.prototype.length +]; + +for (let value of primitives) { + let prototype = Object.getPrototypeOf(value); + prototype[Symbol.isConcatSpreadable] = true; + + Object.defineProperty(prototype, "length", { + configurable: true, + get() { + // Should never invoke length getter + assertEq(true, false); + }, + }); + + let x = [1, 2].concat(value); + assertDeepEq(x, [1, 2, value]); + + delete prototype[Symbol.isConcatSpreadable]; + delete prototype.length; + + prototype.length; +} + +reportCompare(true, true); |