dflt-obj-ptrn-prop-id-trailing-comma.js (1215B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/obj-ptrn-prop-id-trailing-comma.case 4 // - src/dstr-binding/default/async-gen-func-expr-dflt.template 5 /*--- 6 description: Trailing comma is allowed following BindingPropertyList (async generator 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 * ( FormalParameters ) { 12 AsyncGeneratorBody } 13 14 [...] 15 3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, scope, strict). 17 [...] 18 19 20 13.3.3 Destructuring Binding Patterns 21 22 ObjectBindingPattern[Yield] : 23 { } 24 { BindingPropertyList[?Yield] } 25 { BindingPropertyList[?Yield] , } 26 ---*/ 27 28 29 var callCount = 0; 30 var f; 31 f = async function*({ x: y, } = { x: 23 }) { 32 assert.sameValue(y, 23); 33 34 assert.throws(ReferenceError, function() { 35 x; 36 }); 37 callCount = callCount + 1; 38 }; 39 40 f().next().then(() => { 41 assert.sameValue(callCount, 1, 'invoked exactly once'); 42 }).then($DONE, $DONE);