// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding/obj-ptrn-prop-id-init.case // - src/dstr-binding/default/async-gen-func-decl.template /*--- description: Binding as specified via property name, identifier, and initializer (async generator function declaration) 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). [...] 13.3.3.7 Runtime Semantics: KeyedBindingInitialization SingleNameBinding : BindingIdentifier Initializeropt [...] 8. Return InitializeReferencedBinding(lhs, v). ---*/ var callCount = 0; async function* f({ x: y = 33 }) { assert.sameValue(y, 33); assert.throws(ReferenceError, function() { x; }); callCount = callCount + 1; }; f({ }).next().then(() => { assert.sameValue(callCount, 1, 'invoked exactly once'); }).then($DONE, $DONE);