public void IsbnFilterWorksTest() { BookRepository repo = new BookRepository(); List <Book> expected = new List <Book>(); expected.Add(Book.CreateBook("1234", "Book nr 1's title", new Author("JK", "Rowling"))); expected.Add(Book.CreateBook("9012", "Book nr 3's title", new Author("Xan", "BridgeBuilder"))); CollectionAssert.AreEqual(expected, repo.searchBookISBN("12*")); }