public void ThrowException_WhenNullOrEmptyFilmIsPassed(string film)
{
//Arrange
var databaseMock = new Mock <IDatabase>();
var sut = new GetFilmScore(databaseMock.Object);
//Act & Assert
Assert.Throws <ArgumentNullException>(() => sut.GetAvgFilmScore(film));
}
public void ThrowException_WhenFilmNotFound()
{
//Arrange
var validFilmName = "validFilmName";
var databaseMock = new Mock <IDatabase>();
databaseMock.Setup(x => x.Films.SingleOrDefault(y => y.Name == validFilmName)).Returns <Film>(null);
var sut = new GetFilmScore(databaseMock.Object);
//Act & Assert
Assert.Throws <ArgumentException>(() => sut.GetAvgFilmScore(validFilmName));
}
public void ShouldReturn_AverageFilmScoreFromAllReviews()
{
//Arrange
var validFilmName = "validFilmName";
var filmMock = new Mock <Film>();
filmMock.Object.Id = 1;
filmMock.Object.Name = validFilmName;
var review1Mock = new Mock <Review>();
review1Mock.SetupGet(x => x.Film).Returns(filmMock.Object);
review1Mock.Object.Rating = 3.5;
var review2Mock = new Mock <Review>();
review2Mock.SetupGet(x => x.Film).Returns(filmMock.Object);
review2Mock.Object.Rating = 7.5;
var review3Mock = new Mock <Review>();
review3Mock.SetupGet(x => x.Film).Returns(filmMock.Object);
review3Mock.Object.Rating = 4.0;
var reviewCollection = new HashSet <Review>();
reviewCollection.Add(review1Mock.Object);
reviewCollection.Add(review2Mock.Object);
reviewCollection.Add(review3Mock.Object);
var reviewRepository = new Mock <IReviewRepository>();
reviewRepository.Setup(x => x.GetAll()).Returns(reviewCollection);
var databaseMock = new Mock <IDatabase>();
databaseMock.SetupGet(x => x.Reviews).Returns(reviewRepository.Object);
databaseMock.Setup(x => x.Films.SingleOrDefault(It.IsAny <Expression <Func <Film, bool> > >())).Returns(filmMock.Object);
var sut = new GetFilmScore(databaseMock.Object);
//Act
var result = sut.GetAvgFilmScore(validFilmName);
//Assert
Assert.AreEqual(5.0, result);
}