public void Throw_When_Passed_Book_Is_Null()
{
// Arrange
IBookServices sut = new BookServices(repository, saveChanges);
Book nullBook = null;
// Act & Assert
Assert.Throws <ArgumentNullException>(() => sut.DeleteBookById(nullBook));
}
public void Remove_Book_With_Exact_Id()
{
// Arrange
IBookServices sut = new BookServices(repository, saveChanges);
sut.AddBook(book);
// Act
sut.DeleteBookById(book.Id);
// Assert
CollectionAssert.DoesNotContain(dbContext.Books, book);
}
public void BeCalledOnce_IfPassedBookIsValid()
{
// Arrange
var dbSetMock = new Mock <ILibrarySystemEfWrapper <Book> >();
var saveChangesMock = new Mock <ILibrarySystemEfDbContextSaveChanges>();
var bookServices = new BookServices(dbSetMock.Object, saveChangesMock.Object);
var bookToDeleteMock = new Mock <Book>();
// Act
bookServices.AddBook(bookToDeleteMock.Object);
bookServices.DeleteBookById(bookToDeleteMock.Object.Id);
// Assert
dbSetMock.Verify(r => r.Delete(bookToDeleteMock.Object.Id), Times.Once);
}