public void HandleEvent_LibraryDownloadTest() { var vm = new LoginViewModel(); var localSettingsService = Mock.Create<ILocalSettingsSerivce>(); vm.TheEventAggregator = Mock.Create<IEventAggregator>(); vm.LocalSettingsService = localSettingsService; vm.HandleEvent(new LibraryDownloadEvent(LibraryTypes.System)); Assert.IsNotNull(string.IsNullOrWhiteSpace(vm.CurrentState)); }