named-dflt-ary-init-iter-no-close.js (1482B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/ary-init-iter-no-close.case 4 // - src/dstr-binding/default/async-gen-func-named-expr-dflt.template 5 /*--- 6 description: Iterator is not closed when exhausted by pattern evaluation (async generator named function expression (default parameter)) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [Symbol.iterator, 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 13.3.3.5 Runtime Semantics: BindingInitialization 21 22 BindingPattern : ArrayBindingPattern 23 24 [...] 25 4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator, 26 result). 27 [...] 28 29 ---*/ 30 var doneCallCount = 0; 31 var iter = {}; 32 iter[Symbol.iterator] = function() { 33 return { 34 next: function() { 35 return { value: null, done: true }; 36 }, 37 return: function() { 38 doneCallCount += 1; 39 return {}; 40 } 41 }; 42 }; 43 44 45 var callCount = 0; 46 var f; 47 f = async function* h([x] = iter) { 48 assert.sameValue(doneCallCount, 0); 49 callCount = callCount + 1; 50 }; 51 52 f().next().then(() => { 53 assert.sameValue(callCount, 1, 'invoked exactly once'); 54 }).then($DONE, $DONE);