public void AddBook()
{
// Arrange
_retrievalMock
.Setup(mock => mock.RetrieveBookInfo(ExistingISBN))
.Returns(DefaultBook());
_daoMock
.Setup(mock => mock.Create(It.IsAny <Book>()))
.Returns(new Book()
{
ISBN = ExistingISBN
});
// Act
string isbn = _bookManagerService.AddBook(ExistingISBN);
// Assert
Assert.Equal(ExistingISBN, isbn);
_retrievalMock.Verify(m => m.RetrieveBookInfo(ExistingISBN), Times.Once);
_daoMock.Verify(m => m.Create(It.IsAny <Book>()), Times.Once);
}
public string Add(string isbn)
{
return(_bookManagerService.AddBook(isbn));
}