From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- .../non262/Array/concat-spreadable-primitive.js | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 js/src/tests/non262/Array/concat-spreadable-primitive.js (limited to 'js/src/tests/non262/Array/concat-spreadable-primitive.js') 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); -- cgit v1.2.3