public void AddAuthorTest_CorrectInput_ReturnedCorrectAuthor(string fullName)
{
// Arrange
Author authorForAdding = new Author(fullName);
int countOfAuthorsBeforeAdding = libraryService.GetAllAuthors().ToList <Author>().Count;
// Act
uint idOfAddedAuthor = libraryService.AddAuthor(authorForAdding);
int countOfAuthorsAfterAdding = libraryService.GetAllAuthors().ToList <Author>().Count;
Author addedAuthor
= libraryService.GetAllAuthors().FirstOrDefault(author => author.Id == idOfAddedAuthor);
// Assert
Assert.AreEqual(countOfAuthorsBeforeAdding + 1, countOfAuthorsAfterAdding);
Assert.AreEqual(authorForAdding, addedAuthor);
}
