public void DownVote()
{
var rating = new Rating(0, 0);
rating.DownVote();
Assert.AreEqual(-1, rating.Sum);
}
public void UpVoteDownVote_PositiveUpAndDownVote_ReturnsCorrectRating()
{
// Arrange
double expectedResult = 0.6;
// Act
rating.UpVote();
rating.UpVote();
rating.UpVote();
rating.DownVote();
rating.DownVote();
rating.DownVote();
rating.DownVote();
rating.DownVote();
// Assert
Assert.AreEqual(expectedResult, rating.CurrentRating);
}