public void ShouldScaleCorrectly()
{
Assert.AreEqual(1, StarRater.Rate(10, 80));
Assert.AreEqual(1, StarRater.Rate(10, 20));
Assert.AreEqual(2, StarRater.Rate(11, 20));
Assert.AreEqual(2, StarRater.Rate(10, 10));
Assert.AreEqual(3, StarRater.Rate(11, 10));
Assert.AreEqual(3, StarRater.Rate(20, 10));
Assert.AreEqual(4, StarRater.Rate(25, 10));
Assert.AreEqual(4, StarRater.Rate(50, 10));
Assert.AreEqual(5, StarRater.Rate(60, 10));
}
public void ShouldReturnFiveWhenThereAreNoLosses()
{
Assert.AreEqual(5, StarRater.Rate(1, 0));
Assert.AreEqual(5, StarRater.Rate(10, 0));
Assert.AreEqual(5, StarRater.Rate(100, 0));
}
public void ShouldReturnOneWhenThereAreNoWins()
{
Assert.AreEqual(1, StarRater.Rate(0, 1));
Assert.AreEqual(1, StarRater.Rate(0, 10));
Assert.AreEqual(1, StarRater.Rate(0, 100));
}
public void ShouldReturnNullWhenThereAreNoRatings()
{
Assert.IsNull(StarRater.Rate(0, 0));
}