named-dflt-ary-ptrn-elem-ary-rest-iter.js (1738B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/ary-ptrn-elem-ary-rest-iter.case 4 // - src/dstr-binding/default/async-gen-func-named-expr-dflt.template 5 /*--- 6 description: BindingElement with array binding pattern and initializer is not used (async generator named 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 * 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 BindingElement : BindingPatternInitializer opt 23 24 1. If iteratorRecord.[[done]] is false, then 25 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 26 [...] 27 e. Else, 28 i. Let v be IteratorValue(next). 29 [...] 30 4. Return the result of performing BindingInitialization of BindingPattern 31 with v and environment as the arguments. 32 ---*/ 33 var values = [2, 1, 3]; 34 var initCount = 0; 35 36 37 var callCount = 0; 38 var f; 39 f = async function* h([[...x] = function() { initCount += 1; }()] = [values]) { 40 assert(Array.isArray(x)); 41 assert.sameValue(x[0], 2); 42 assert.sameValue(x[1], 1); 43 assert.sameValue(x[2], 3); 44 assert.sameValue(x.length, 3); 45 assert.notSameValue(x, values); 46 assert.sameValue(initCount, 0); 47 callCount = callCount + 1; 48 }; 49 50 f().next().then(() => { 51 assert.sameValue(callCount, 1, 'invoked exactly once'); 52 }).then($DONE, $DONE);