dflt-obj-ptrn-id-init-fn-name-gen.js (1588B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/obj-ptrn-id-init-fn-name-gen.case 4 // - src/dstr-binding/default/async-gen-func-decl-dflt.template 5 /*--- 6 description: SingleNameBinding assigns name to "anonymous" generator functions (async generator function declaration (default parameter)) 7 esid: sec-asyncgenerator-definitions-instantiatefunctionobject 8 features: [generators, async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier 12 ( FormalParameters ) { AsyncGeneratorBody } 13 14 [...] 15 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, 16 scope, strict). 17 [...] 18 19 20 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 21 22 SingleNameBinding : BindingIdentifier Initializeropt 23 24 [...] 25 6. If Initializer is present and v is undefined, then 26 [...] 27 d. If IsAnonymousFunctionDefinition(Initializer) is true, then 28 i. Let hasNameProperty be HasOwnProperty(v, "name"). 29 ii. ReturnIfAbrupt(hasNameProperty). 30 iii. If hasNameProperty is false, perform SetFunctionName(v, 31 bindingId). 32 33 ---*/ 34 35 36 var callCount = 0; 37 async function* f({ gen = function* () {}, xGen = function* x() {} } = {}) { 38 assert.sameValue(gen.name, 'gen'); 39 assert.notSameValue(xGen.name, 'xGen'); 40 callCount = callCount + 1; 41 }; 42 f().next().then(() => { 43 assert.sameValue(callCount, 1, 'invoked exactly once'); 44 }).then($DONE, $DONE);