From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- ...-compound-assignment-property-key-evaluation.js | 68 ++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 js/src/tests/non262/expressions/short-circuit-compound-assignment-property-key-evaluation.js (limited to 'js/src/tests/non262/expressions/short-circuit-compound-assignment-property-key-evaluation.js') 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); -- cgit v1.2.3