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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/expressions/short-circuit-compound-assignment-property-key-evaluation.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/expressions/short-circuit-compound-assignment-property-key-evaluation.js | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/js/src/tests/non262/expressions/short-circuit-compound-assignment-property-key-evaluation.js b/js/src/tests/non262/expressions/short-circuit-compound-assignment-property-key-evaluation.js new file mode 100644 index 0000000000..2026aa25d1 --- /dev/null +++ b/js/src/tests/non262/expressions/short-circuit-compound-assignment-property-key-evaluation.js @@ -0,0 +1,68 @@ +// Test that property keys are only evaluated once. + +class PropertyKey { + constructor(key) { + this.key = key; + this.count = 0; + } + + toString() { + this.count++; + return this.key; + } + + valueOf() { + throw new Error("unexpected valueOf call"); + } +} + +// AndAssignExpr +{ + let obj = {p: true}; + let pk = new PropertyKey("p"); + + obj[pk] &&= false; + + assertEq(obj.p, false); + assertEq(pk.count, 1); + + obj[pk] &&= true; + + assertEq(obj.p, false); + assertEq(pk.count, 2); +} + +// OrAssignExpr +{ + let obj = {p: false}; + let pk = new PropertyKey("p"); + + obj[pk] ||= true; + + assertEq(obj.p, true); + assertEq(pk.count, 1); + + obj[pk] ||= false; + + assertEq(obj.p, true); + assertEq(pk.count, 2); +} + +// CoalesceAssignExpr +{ + let obj = {p: null}; + let pk = new PropertyKey("p"); + + obj[pk] ??= true; + + assertEq(obj.p, true); + assertEq(pk.count, 1); + + obj[pk] ??= false; + + assertEq(obj.p, true); + assertEq(pk.count, 2); +} + +if (typeof reportCompare === "function") + reportCompare(0, 0); |