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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/Symbol/for-in-order.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/Symbol/for-in-order.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/non262/Symbol/for-in-order.js b/js/src/tests/non262/Symbol/for-in-order.js new file mode 100644 index 0000000000..7d1f234305 --- /dev/null +++ b/js/src/tests/non262/Symbol/for-in-order.js @@ -0,0 +1,33 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ + +// ES6 does not specify enumeration order, but implementations mostly retain +// property insertion order -- and must, for web compatibility. This test checks +// that symbol-keyed properties do not interfere with that order. + +var obj = {}; +obj[Symbol("moon")] = 0; +obj.x = 1; +obj[Symbol.for("y")] = 2 +obj.y = 3; +obj[Symbol.iterator] = function* () { yield 4; }; +obj.z = 5; +Object.prototype[Symbol.for("comet")] = 6; + +var keys = []; +for (var k in obj) + keys.push(k); +assertDeepEq(keys, ["x", "y", "z"]); +assertDeepEq(Object.keys(obj), ["x", "y", "z"]); + +// Test with more properties. +for (var i = 0; i < 1000; i++) + obj[Symbol(i)] = i; +obj.w = 1000; +keys = [] +for (var k in obj) + keys.push(k); +assertDeepEq(keys, ["x", "y", "z", "w"]); + +if (typeof reportCompare === "function") + reportCompare(0, 0); |