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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/test262/language/statements/generators/params-dflt-args-unmapped.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 'js/src/tests/test262/language/statements/generators/params-dflt-args-unmapped.js')
-rw-r--r-- | js/src/tests/test262/language/statements/generators/params-dflt-args-unmapped.js | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/generators/params-dflt-args-unmapped.js b/js/src/tests/test262/language/statements/generators/params-dflt-args-unmapped.js new file mode 100644 index 0000000000..b1379dcd8d --- /dev/null +++ b/js/src/tests/test262/language/statements/generators/params-dflt-args-unmapped.js @@ -0,0 +1,83 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +description: Referencing the arguments object from a default parameter (generator function declaration) +esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject +es6id: 14.4.12 +features: [generators, default-parameters] +info: | + GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody } + + [...] + 2. Let F be GeneratorFunctionCreate(Normal, FormalParameters, + GeneratorBody, scope, strict). + [...] + + 9.2.1 [[Call]] ( thisArgument, argumentsList) + + [...] + 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). + [...] + + 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) + + 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). + [...] + + 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) + + [...] + 23. Let iteratorRecord be Record {[[iterator]]: + CreateListIterator(argumentsList), [[done]]: false}. + 24. If hasDuplicates is true, then + [...] + 25. Else, + b. Let formalStatus be IteratorBindingInitialization for formals with + iteratorRecord and env as arguments. + [...] + + 14.1.19 Runtime Semantics: IteratorBindingInitialization + + FormalsList : FormalsList , FormalParameter + + 1. Let status be the result of performing IteratorBindingInitialization for + FormalsList using iteratorRecord and environment as the arguments. + 2. ReturnIfAbrupt(status). + 3. Return the result of performing IteratorBindingInitialization for + FormalParameter using iteratorRecord and environment as the arguments. +---*/ + +var callCount = 0; +function* f(x, _ = 0) { + assert.sameValue(x, undefined, 'parameter binding value (initial)'); + assert.sameValue( + arguments[0], undefined, 'arguments property value (initial)' + ); + + arguments[0] = 1; + + assert.sameValue( + x, undefined, 'parameter binding value (after arguments modification)' + ); + assert.sameValue( + arguments[0], 1, 'arguments property value (after arguments modification)' + ); + + x = 2; + + assert.sameValue( + x, 2, 'parameter binding value (after parameter binding modification)' + ); + assert.sameValue( + arguments[0], + 1, + 'arguments property value (after parameter binding modification)' + ); + callCount = callCount + 1; +} + +f().next(); + +assert.sameValue(callCount, 1, 'generator function invoked exactly once'); + +reportCompare(0, 0); |