async-gen-meth-dflt-params-ref-prior.js (1963B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/function-forms/dflt-params-ref-prior.case 4 // - src/function-forms/default/async-gen-meth.template 5 /*--- 6 description: Referencing a parameter that occurs earlier in the ParameterList (async generator method) 7 esid: sec-asyncgenerator-definitions-propertydefinitionevaluation 8 features: [default-parameters, 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 14.1.19 Runtime Semantics: IteratorBindingInitialization 26 27 FormalsList : FormalsList , FormalParameter 28 29 1. Let status be the result of performing IteratorBindingInitialization for 30 FormalsList using iteratorRecord and environment as the arguments. 31 2. ReturnIfAbrupt(status). 32 3. Return the result of performing IteratorBindingInitialization for 33 FormalParameter using iteratorRecord and environment as the arguments. 34 35 ---*/ 36 var x = 0; 37 38 var callCount = 0; 39 var obj = { 40 async *method(x, y = x, z = y) { 41 assert.sameValue(x, 3, 'first argument value'); 42 assert.sameValue(y, 3, 'second argument value'); 43 assert.sameValue(z, 3, 'third argument value'); 44 callCount = callCount + 1; 45 } 46 }; 47 48 // Stores a reference `ref` for case evaluation 49 var ref = obj.method; 50 51 ref(3).next().then(() => { 52 assert.sameValue(callCount, 1, 'generator method invoked exactly once'); 53 }).then($DONE, $DONE);