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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/Function/configurable-length-builtins.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/Function/configurable-length-builtins.js | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/non262/Function/configurable-length-builtins.js b/js/src/tests/non262/Function/configurable-length-builtins.js new file mode 100644 index 0000000000..f28eaae157 --- /dev/null +++ b/js/src/tests/non262/Function/configurable-length-builtins.js @@ -0,0 +1,21 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ + +// Deleting .length from a variety of builtin functions works as expected. +for (var fun of [Math.sin, Array.prototype.map, eval]) { + assertEq(delete fun.length, true); + assertEq(fun.hasOwnProperty("length"), false); + assertEq("length" in fun, true); // still inheriting Function.prototype.length + assertEq(fun.length, 0); + + // The inherited property is nonwritable, so assigning still fails + // (silently, in sloppy mode). + fun.length = Math.hypot; + assertEq(fun.length, 0); + + // It can be shadowed via defineProperty. + Object.defineProperty(fun, "length", {value: Math.hypot}); + assertEq(fun.length, Math.hypot); +} + +reportCompare(0, 0, 'ok'); |