dflt-obj-ptrn-id-init-fn-name-fn.js (1556B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/obj-ptrn-id-init-fn-name-fn.case 4 // - src/dstr-binding/default/async-gen-func-decl-dflt.template 5 /*--- 6 description: SingleNameBinding assigns name to "anonymous" functions (async generator function declaration (default parameter)) 7 esid: sec-asyncgenerator-definitions-instantiatefunctionobject 8 features: [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 var callCount = 0; 36 async function* f({ fn = function () {}, xFn = function x() {} } = {}) { 37 assert.sameValue(fn.name, 'fn'); 38 assert.notSameValue(xFn.name, 'xFn'); 39 callCount = callCount + 1; 40 }; 41 f().next().then(() => { 42 assert.sameValue(callCount, 1, 'invoked exactly once'); 43 }).then($DONE, $DONE);