cls-expr-async-gen-func-args-trailing-comma-spread-operator.js (1560B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/arguments/args-trailing-comma-spread-operator.case 4 // - src/arguments/default/async-gen-func-expr.template 5 /*--- 6 description: A trailing comma should not increase the arguments.length, using spread args (async generator function expression) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) { 12 AsyncGeneratorBody } 13 14 [...] 15 3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, scope, strict). 17 [...] 18 19 20 Trailing comma in the arguments list 21 22 Left-Hand-Side Expressions 23 24 Arguments : 25 ( ) 26 ( ArgumentList ) 27 ( ArgumentList , ) 28 29 ArgumentList : 30 AssignmentExpression 31 ... AssignmentExpression 32 ArgumentList , AssignmentExpression 33 ArgumentList , ... AssignmentExpression 34 ---*/ 35 var arr = [2, 3]; 36 37 38 39 var callCount = 0; 40 // Stores a reference `ref` for case evaluation 41 var ref; 42 ref = async function*() { 43 assert.sameValue(arguments.length, 4); 44 assert.sameValue(arguments[0], 42); 45 assert.sameValue(arguments[1], 1); 46 assert.sameValue(arguments[2], 2); 47 assert.sameValue(arguments[3], 3); 48 callCount = callCount + 1; 49 }; 50 51 ref(42, ...[1], ...arr,).next().then(() => { 52 assert.sameValue(callCount, 1, 'generator function invoked exactly once'); 53 }).then($DONE, $DONE);