async-gen-meth-dflt-obj-ptrn-prop-obj-init.js (1872B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/obj-ptrn-prop-obj-init.case 4 // - src/dstr-binding/default/async-gen-method-dflt.template 5 /*--- 6 description: Object binding pattern with "nested" object binding pattern using initializer (async generator method (default parameter)) 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 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 26 27 [...] 28 3. If Initializer is present and v is undefined, then 29 a. Let defaultValue be the result of evaluating Initializer. 30 b. Let v be GetValue(defaultValue). 31 c. ReturnIfAbrupt(v). 32 4. Return the result of performing BindingInitialization for BindingPattern 33 passing v and environment as arguments. 34 ---*/ 35 36 37 var callCount = 0; 38 var obj = { 39 async *method({ w: { x, y, z } = { x: 4, y: 5, z: 6 } } = { w: undefined }) { 40 assert.sameValue(x, 4); 41 assert.sameValue(y, 5); 42 assert.sameValue(z, 6); 43 44 assert.throws(ReferenceError, function() { 45 w; 46 }); 47 callCount = callCount + 1; 48 } 49 }; 50 51 obj.method().next().then(() => { 52 assert.sameValue(callCount, 1, 'invoked exactly once'); 53 }).then($DONE, $DONE);