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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-const.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-const.js | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/js/src/tests/non262/expressions/short-circuit-compound-assignment-const.js b/js/src/tests/non262/expressions/short-circuit-compound-assignment-const.js new file mode 100644 index 0000000000..8499e2fb74 --- /dev/null +++ b/js/src/tests/non262/expressions/short-circuit-compound-assignment-const.js @@ -0,0 +1,90 @@ +// Test assignment to const and function name bindings. The latter is kind of a +// const binding, but only throws in strict mode. + +function notEvaluated() { + throw new Error("should not be evaluated"); +} + +// AndAssignExpr with const lexical binding. +{ + const a = false; + a &&= notEvaluated(); + assertEq(a, false); + + const b = true; + assertThrowsInstanceOf(() => { b &&= 1; }, TypeError); + assertEq(b, true); +} + +// AndAssignExpr with function name binding. +{ + let f = function fn() { + fn &&= true; + assertEq(fn, f); + }; + f(); + + let g = function fn() { + "use strict"; + assertThrowsInstanceOf(() => { fn &&= 1; }, TypeError); + assertEq(fn, g); + }; + g(); +} + +// OrAssignExpr with const lexical binding. +{ + const a = true; + a ||= notEvaluated(); + assertEq(a, true); + + const b = false; + assertThrowsInstanceOf(() => { b ||= 0; }, TypeError); + assertEq(b, false); +} + +// OrAssignExpr with function name binding. +{ + let f = function fn() { + fn ||= notEvaluated(); + assertEq(fn, f); + }; + f(); + + let g = function fn() { + "use strict"; + fn ||= notEvaluated(); + assertEq(fn, g); + }; + g(); +} + +// CoalesceAssignExpr with const lexical binding. +{ + const a = true; + a ??= notEvaluated(); + assertEq(a, true); + + const b = null; + assertThrowsInstanceOf(() => { b ??= 0; }, TypeError); + assertEq(b, null); +} + +// CoalesceAssignExpr with function name binding. +{ + let f = function fn() { + fn ??= notEvaluated(); + assertEq(fn, f); + }; + f(); + + let g = function fn() { + "use strict"; + fn ??= notEvaluated(); + assertEq(fn, g); + }; + g(); +} + +if (typeof reportCompare === "function") + reportCompare(0, 0); |