public static void IsRemoveUserFromChatWorks() { var user = usrPrv.GetUserById(1); var chat = chatPrv.GetChatById(2); int usersBefore = chatPrv.GetUsersOfChat(chat).Count; chatPrv.RemoveUserFromChat(user, chat); int usersAfter = chatPrv.GetUsersOfChat(chat).Count; Assert.That(usersAfter == usersBefore - 1); }