public async Task GetBooks_ReturnsBooks()
{
var fakeBooks = FakeBuilder.CreateMany <Book>().ToList();
BookRepositoryMock.Setup(r => r.Get()).ReturnsAsync(fakeBooks);
var expectedResult = fakeBooks.ToRepresentation();
var result = await Controller.Get();
Assert.IsNotNull(result);
Assert.IsInstanceOf <OkNegotiatedContentResult <ICollection <BookRepresentation> > >(result);
var resultContent = ((OkNegotiatedContentResult <ICollection <BookRepresentation> >)result).Content;
Assert.AreEqual(resultContent, expectedResult.ToList());
}