// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-cover.case // - src/dstr-binding/default/async-gen-func-decl-dflt.template /*--- description: SingleNameBinding does assign name to "anonymous" functions "through" cover grammar (async generator function declaration (default parameter)) esid: sec-asyncgenerator-definitions-instantiatefunctionobject features: [async-iteration] flags: [generated, async] info: | AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody } [...] 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, scope, strict). [...] 13.3.3.6 Runtime Semantics: IteratorBindingInitialization SingleNameBinding : BindingIdentifier Initializeropt [...] 6. If Initializer is present and v is undefined, then a. Let defaultValue be the result of evaluating Initializer. b. Let v be GetValue(defaultValue). c. ReturnIfAbrupt(v). d. If IsAnonymousFunctionDefinition(Initializer) is true, then [...] 7. If environment is undefined, return PutValue(lhs, v). 8. Return InitializeReferencedBinding(lhs, v). ---*/ var callCount = 0; async function* f([cover = (function () {}), xCover = (0, function() {})] = []) { assert.sameValue(cover.name, 'cover'); assert.notSameValue(xCover.name, 'xCover'); callCount = callCount + 1; }; f().next().then(() => { assert.sameValue(callCount, 1, 'invoked exactly once'); }).then($DONE, $DONE);