named-dflt-obj-ptrn-prop-obj.js (1477B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/obj-ptrn-prop-obj.case 4 // - src/dstr-binding/default/async-gen-func-named-expr-dflt.template 5 /*--- 6 description: Object binding pattern with "nested" object binding pattern not using initializer (async generator named 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 * BindingIdentifier 12 ( FormalParameters ) { AsyncGeneratorBody } 13 14 [...] 15 7. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, funcEnv, strict). 17 [...] 18 19 20 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 21 22 [...] 23 3. If Initializer is present and v is undefined, then 24 [...] 25 4. Return the result of performing BindingInitialization for BindingPattern 26 passing v and environment as arguments. 27 ---*/ 28 29 30 var callCount = 0; 31 var f; 32 f = async function* h({ w: { x, y, z } = { x: 4, y: 5, z: 6 } } = { w: { x: undefined, z: 7 } }) { 33 assert.sameValue(x, undefined); 34 assert.sameValue(y, undefined); 35 assert.sameValue(z, 7); 36 37 assert.throws(ReferenceError, function() { 38 w; 39 }); 40 callCount = callCount + 1; 41 }; 42 43 f().next().then(() => { 44 assert.sameValue(callCount, 1, 'invoked exactly once'); 45 }).then($DONE, $DONE);