obj-ptrn-prop-ary-init.js (1486B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/obj-ptrn-prop-ary-init.case 4 // - src/dstr-binding/default/async-gen-func-expr.template 5 /*--- 6 description: Object binding pattern with "nested" array binding pattern using initializer (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 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 21 22 [...] 23 3. If Initializer is present and v is undefined, then 24 a. Let defaultValue be the result of evaluating Initializer. 25 b. Let v be GetValue(defaultValue). 26 c. ReturnIfAbrupt(v). 27 4. Return the result of performing BindingInitialization for BindingPattern 28 passing v and environment as arguments. 29 ---*/ 30 31 32 var callCount = 0; 33 var f; 34 f = async function*({ w: [x, y, z] = [4, 5, 6] }) { 35 assert.sameValue(x, 4); 36 assert.sameValue(y, 5); 37 assert.sameValue(z, 6); 38 39 assert.throws(ReferenceError, function() { 40 w; 41 }); 42 callCount = callCount + 1; 43 }; 44 45 f({}).next().then(() => { 46 assert.sameValue(callCount, 1, 'invoked exactly once'); 47 }).then($DONE, $DONE);