public IList<Book> GetAll()
 {
     IList<Book> allBook = new List<Book>();
     Author author = new Author() { Id = 1, Name = "Author name" };
     allBook.Add(new Book() { Id = 1, Name = "Book 01", Author = author, Price = 10 });
     allBook.Add(new Book() { Id = 2, Name = "Book 02", Author = author, Price = 10 });
     allBook.Add(new Book() { Id = 3, Name = "Book 03", Author = author, Price = 10 });
     allBook.Add(new Book() { Id = 4, Name = "Book 04", Author = author, Price = 10 });
     allBook.Add(new Book() { Id = 5, Name = "Book 05", Author = author, Price = 10 });
     return allBook;
 }
        public void Add_EmptyDatabase_OneRowInserted()
        {
            // Arrange
            Author author = new Author() { Name = "J. K. Rowling" };

            //Act
            this._dataContext.Add<Author>(author);

            //Assert
            DataSet dataSet = this._ndbUnitTest.GetDataSetFromDb();
            Assert.AreEqual(1, dataSet.Tables["authors"].Rows.Count);
        }