diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /js/src/tests/non262/Map/symbols.js | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/tests/non262/Map/symbols.js')
-rw-r--r-- | js/src/tests/non262/Map/symbols.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/non262/Map/symbols.js b/js/src/tests/non262/Map/symbols.js new file mode 100644 index 0000000000..30589a9732 --- /dev/null +++ b/js/src/tests/non262/Map/symbols.js @@ -0,0 +1,33 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ + +var m = new Map; + +// Symbols can be Map keys. +var sym = Symbol(); +m.set(sym, "zero"); +assertEq(m.has(sym), true); +assertEq(m.get(sym), "zero"); +assertEq(m.has(Symbol()), false); +assertEq(m.get(Symbol()), undefined); +assertEq([...m][0][0], sym); +m.set(sym, "replaced"); +assertEq(m.get(sym), "replaced"); +m.delete(sym); +assertEq(m.has(sym), false); +assertEq(m.size, 0); + +// Symbols returned by Symbol.for() can be Map keys. +for (var word of "that that is is that that is not is not is that not it".split(' ')) { + sym = Symbol.for(word); + m.set(sym, (m.get(sym) || 0) + 1); +} +assertDeepEq([...m], [ + [Symbol.for("that"), 5], + [Symbol.for("is"), 5], + [Symbol.for("not"), 3], + [Symbol.for("it"), 1] +]); + +if (typeof reportCompare === "function") + reportCompare(0, 0); |