async-gen-meth-args-trailing-comma-single-args.js (1738B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/arguments/args-trailing-comma-single-args.case 4 // - src/arguments/default/async-gen-meth.template 5 /*--- 6 description: A trailing comma should not increase the arguments.length, using a single arg (async generator method) 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 Trailing comma in the arguments list 26 27 Left-Hand-Side Expressions 28 29 Arguments : 30 ( ) 31 ( ArgumentList ) 32 ( ArgumentList , ) 33 34 ArgumentList : 35 AssignmentExpression 36 ... AssignmentExpression 37 ArgumentList , AssignmentExpression 38 ArgumentList , ... AssignmentExpression 39 ---*/ 40 41 var callCount = 0; 42 var obj = { 43 async *method() { 44 assert.sameValue(arguments.length, 1); 45 assert.sameValue(arguments[0], 42); 46 callCount = callCount + 1; 47 } 48 }; 49 50 // Stores a reference `ref` for case evaluation 51 var ref = obj.method; 52 53 ref(42,).next().then(() => { 54 assert.sameValue(callCount, 1, 'generator method invoked exactly once'); 55 }).then($DONE, $DONE);