async-gen-meth-dflt-ary-ptrn-elem-id-init-fn-name-fn.js (2536B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-fn.case 4 // - src/dstr-binding/default/cls-decl-async-gen-meth-dflt.template 5 /*--- 6 description: SingleNameBinding assigns name to "anonymous" functions (class expression async generator method (default parameters)) 7 esid: sec-class-definitions-runtime-semantics-evaluation 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 ClassDeclaration : class BindingIdentifier ClassTail 12 13 1. Let className be StringValue of BindingIdentifier. 14 2. Let value be the result of ClassDefinitionEvaluation of ClassTail with 15 argument className. 16 [...] 17 18 14.5.14 Runtime Semantics: ClassDefinitionEvaluation 19 20 21. For each ClassElement m in order from methods 21 a. If IsStatic of m is false, then 22 i. Let status be the result of performing 23 PropertyDefinitionEvaluation for m with arguments proto and 24 false. 25 [...] 26 27 Runtime Semantics: PropertyDefinitionEvaluation 28 29 AsyncGeneratorMethod : 30 async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) 31 { AsyncGeneratorBody } 32 33 1. Let propKey be the result of evaluating PropertyName. 34 2. ReturnIfAbrupt(propKey). 35 3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true. 36 Otherwise let strict be false. 37 4. Let scope be the running execution context's LexicalEnvironment. 38 5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters, 39 AsyncGeneratorBody, scope, strict). 40 [...] 41 42 43 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 44 45 SingleNameBinding : BindingIdentifier Initializeropt 46 47 [...] 48 6. If Initializer is present and v is undefined, then 49 a. Let defaultValue be the result of evaluating Initializer. 50 b. Let v be GetValue(defaultValue). 51 c. ReturnIfAbrupt(v). 52 d. If IsAnonymousFunctionDefinition(Initializer) is true, then 53 [...] 54 7. If environment is undefined, return PutValue(lhs, v). 55 8. Return InitializeReferencedBinding(lhs, v). 56 ---*/ 57 58 59 var callCount = 0; 60 class C { 61 async *method([fn = function () {}, xFn = function x() {}] = []) { 62 assert.sameValue(fn.name, 'fn'); 63 assert.notSameValue(xFn.name, 'xFn'); 64 callCount = callCount + 1; 65 } 66 }; 67 68 new C().method().next().then(() => { 69 assert.sameValue(callCount, 1, 'invoked exactly once'); 70 }).then($DONE, $DONE);