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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /js/src/tests/non262/lexical-environment/unscopables-strict.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/lexical-environment/unscopables-strict.js')
-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); |