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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/lexical-environment/unscopables-strict.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.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/lexical-environment/unscopables-strict.js | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/tests/non262/lexical-environment/unscopables-strict.js b/js/src/tests/non262/lexical-environment/unscopables-strict.js new file mode 100644 index 0000000000..fd0413ed7b --- /dev/null +++ b/js/src/tests/non262/lexical-environment/unscopables-strict.js @@ -0,0 +1,32 @@ +// Strict assignment to the name of a property that's masked by @@unscopables +// throws a ReferenceError. + +let env = {k: 1}; +let f; +with (env) { + f = function () { + "use strict"; + k = 2; + }; +} + +f(); +assertEq(env.k, 2); + +env[Symbol.unscopables] = {k: true}; +assertThrowsInstanceOf(f, ReferenceError); + +// @@unscopables is tested when the LHS of assignment is evaluated, so there is +// no effect on the assignment if it is changed while evaluating the RHS. +let g; +with (env) { + g = function () { + "use strict"; + k = (env[Symbol.unscopables].k = true, 3); + } +} +env[Symbol.unscopables].k = false; +g(); +assertEq(env.k, 3); + +reportCompare(0, 0); |