public void ShouldNotSetSelectedSessionsAfterRefreshIfNoSelectionExistedBefore() { var sessions = Fix.SomeLogs(4); WhenViewModelIsRefreshedWithSessions(sessions); var eventInvoked = false; _uut.OnPropertyChanged(m => m.SelectedSessions, selection => eventInvoked = true); WhenViewModelIsRefreshedWithSessions(sessions); Assert.IsFalse(eventInvoked); }