dflt-ary-ptrn-elem-id-init-fn-name-class.js (1667B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-class.case 4 // - src/dstr-binding/default/async-gen-func-expr-dflt.template 5 /*--- 6 description: SingleNameBinding assigns `name` to "anonymous" classes (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 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 21 22 SingleNameBinding : BindingIdentifier Initializeropt 23 24 [...] 25 6. If Initializer is present and v is undefined, then 26 a. Let defaultValue be the result of evaluating Initializer. 27 b. Let v be GetValue(defaultValue). 28 c. ReturnIfAbrupt(v). 29 d. If IsAnonymousFunctionDefinition(Initializer) is true, then 30 [...] 31 7. If environment is undefined, return PutValue(lhs, v). 32 8. Return InitializeReferencedBinding(lhs, v). 33 ---*/ 34 35 36 var callCount = 0; 37 var f; 38 f = async function*([cls = class {}, xCls = class X {}, xCls2 = class { static name() {} }] = []) { 39 assert.sameValue(cls.name, 'cls'); 40 assert.notSameValue(xCls.name, 'xCls'); 41 assert.notSameValue(xCls2.name, 'xCls2'); 42 callCount = callCount + 1; 43 }; 44 45 f().next().then(() => { 46 assert.sameValue(callCount, 1, 'invoked exactly once'); 47 }).then($DONE, $DONE);