named-ary-ptrn-elem-id-init-fn-name-fn.js (1595B)
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/async-gen-func-named-expr.template 5 /*--- 6 description: SingleNameBinding assigns name to "anonymous" functions (async generator named function expression) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorExpression : async [no LineTerminator here] function * BindingIdentifier 12 ( FormalParameters ) { AsyncGeneratorBody } 13 14 [...] 15 7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, funcEnv, strict). 17 [...] 18 19 20 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 21 22 SingleNameBinding : BindingIdentifier Initializeropt 23 24 [...] 25 6. If Initializer is present and v is undefined, then 26 a. Let defaultValue be the result of evaluating Initializer. 27 b. Let v be GetValue(defaultValue). 28 c. ReturnIfAbrupt(v). 29 d. If IsAnonymousFunctionDefinition(Initializer) is true, then 30 [...] 31 7. If environment is undefined, return PutValue(lhs, v). 32 8. Return InitializeReferencedBinding(lhs, v). 33 ---*/ 34 35 36 var callCount = 0; 37 var f; 38 f = async function* h([fn = function () {}, xFn = function x() {}]) { 39 assert.sameValue(fn.name, 'fn'); 40 assert.notSameValue(xFn.name, 'xFn'); 41 callCount = callCount + 1; 42 }; 43 44 f([]).next().then(() => { 45 assert.sameValue(callCount, 1, 'invoked exactly once'); 46 }).then($DONE, $DONE);