public void AddBook_SingleBookGetsAdded() { var book = new Book { Id = 1, Author = "Szerző", Title = "Cim", Year = 2000, Available = true, DueDate = new DateTime(2000, 01, 01), Reader = null }; _screenHelper.Setup(s => s.GetNewBookDetails()).Returns(book); _add.AddNewBook(); _bookRepository.Verify(br => br.StoreABook(book), Times.Once()); }