dflt-ary-ptrn-elem-id-iter-complete.js (1549B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/ary-ptrn-elem-id-iter-complete.case 4 // - src/dstr-binding/default/async-gen-func-expr-dflt.template 5 /*--- 6 description: SingleNameBinding when value iteration completes (async generator function expression (default parameter)) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) { 12 AsyncGeneratorBody } 13 14 [...] 15 3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, scope, strict). 17 [...] 18 19 20 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 21 22 SingleNameBinding : BindingIdentifier Initializeropt 23 24 [...] 25 4. If iteratorRecord.[[done]] is false, then 26 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 27 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 28 c. ReturnIfAbrupt(next). 29 d. If next is false, set iteratorRecord.[[done]] to true. 30 e. Else, 31 [...] 32 5. If iteratorRecord.[[done]] is true, let v be undefined. 33 [...] 34 8. Return InitializeReferencedBinding(lhs, v). 35 ---*/ 36 37 38 var callCount = 0; 39 var f; 40 f = async function*([x] = []) { 41 assert.sameValue(x, undefined); 42 callCount = callCount + 1; 43 }; 44 45 f().next().then(() => { 46 assert.sameValue(callCount, 1, 'invoked exactly once'); 47 }).then($DONE, $DONE);