async-gen-meth-dflt-ary-ptrn-elem-ary-rest-iter.js (2036B)
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-method-dflt.template 5 /*--- 6 description: BindingElement with array binding pattern and initializer is not used (async generator method (default parameter)) 7 esid: sec-asyncgenerator-definitions-propertydefinitionevaluation 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorMethod : 12 async [no LineTerminator here] * PropertyName ( UniqueFormalParameters ) 13 { AsyncGeneratorBody } 14 15 1. Let propKey be the result of evaluating PropertyName. 16 2. ReturnIfAbrupt(propKey). 17 3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true. 18 Otherwise let strict be false. 19 4. Let scope be the running execution context's LexicalEnvironment. 20 5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters, 21 AsyncGeneratorBody, scope, strict). 22 [...] 23 24 25 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 26 27 BindingElement : BindingPatternInitializer opt 28 29 1. If iteratorRecord.[[done]] is false, then 30 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 31 [...] 32 e. Else, 33 i. Let v be IteratorValue(next). 34 [...] 35 4. Return the result of performing BindingInitialization of BindingPattern 36 with v and environment as the arguments. 37 ---*/ 38 var values = [2, 1, 3]; 39 var initCount = 0; 40 41 42 var callCount = 0; 43 var obj = { 44 async *method([[...x] = function() { initCount += 1; }()] = [values]) { 45 assert(Array.isArray(x)); 46 assert.sameValue(x[0], 2); 47 assert.sameValue(x[1], 1); 48 assert.sameValue(x[2], 3); 49 assert.sameValue(x.length, 3); 50 assert.notSameValue(x, values); 51 assert.sameValue(initCount, 0); 52 callCount = callCount + 1; 53 } 54 }; 55 56 obj.method().next().then(() => { 57 assert.sameValue(callCount, 1, 'invoked exactly once'); 58 }).then($DONE, $DONE);