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Diffstat (limited to 'js/src/tests/test262/language/statements/class/dstr/async-gen-meth-ary-ptrn-elem-ary-elision-init.js')
-rw-r--r-- | js/src/tests/test262/language/statements/class/dstr/async-gen-meth-ary-ptrn-elem-ary-elision-init.js | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/dstr/async-gen-meth-ary-ptrn-elem-ary-elision-init.js b/js/src/tests/test262/language/statements/class/dstr/async-gen-meth-ary-ptrn-elem-ary-elision-init.js new file mode 100644 index 0000000000..d428628e0d --- /dev/null +++ b/js/src/tests/test262/language/statements/class/dstr/async-gen-meth-ary-ptrn-elem-ary-elision-init.js @@ -0,0 +1,76 @@ +// |reftest| async +// This file was procedurally generated from the following sources: +// - src/dstr-binding/ary-ptrn-elem-ary-elision-init.case +// - src/dstr-binding/default/cls-decl-async-gen-meth.template +/*--- +description: BindingElement with array binding pattern and initializer is used (class expression method) +esid: sec-class-definitions-runtime-semantics-evaluation +features: [generators, async-iteration] +flags: [generated, async] +info: | + ClassDeclaration : class BindingIdentifier ClassTail + + 1. Let className be StringValue of BindingIdentifier. + 2. Let value be the result of ClassDefinitionEvaluation of ClassTail with + argument className. + [...] + + 14.5.14 Runtime Semantics: ClassDefinitionEvaluation + + 21. For each ClassElement m in order from methods + a. If IsStatic of m is false, then + i. Let status be the result of performing + PropertyDefinitionEvaluation for m with arguments proto and + false. + [...] + + Runtime Semantics: PropertyDefinitionEvaluation + + AsyncGeneratorMethod : + async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) + { AsyncGeneratorBody } + + 1. Let propKey be the result of evaluating PropertyName. + 2. ReturnIfAbrupt(propKey). + 3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true. + Otherwise let strict be false. + 4. Let scope be the running execution context's LexicalEnvironment. + 5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters, + AsyncGeneratorBody, scope, strict). + [...] + + + 13.3.3.6 Runtime Semantics: IteratorBindingInitialization + + BindingElement : BindingPatternInitializer opt + + [...] + 2. If iteratorRecord.[[done]] is true, let v be undefined. + 3. If Initializer is present and v is undefined, then + a. Let defaultValue be the result of evaluating Initializer. + b. Let v be ? GetValue(defaultValue). + 4. Return the result of performing BindingInitialization of BindingPattern + with v and environment as the arguments. + +---*/ +var first = 0; +var second = 0; +function* g() { + first += 1; + yield; + second += 1; +}; + + +var callCount = 0; +class C { + async *method([[,] = g()]) { + assert.sameValue(first, 1); + assert.sameValue(second, 0); + callCount = callCount + 1; + } +}; + +new C().method([]).next().then(() => { + assert.sameValue(callCount, 1, 'invoked exactly once'); +}).then($DONE, $DONE); |