public void does_not_use_negative_input_values()
{
//arrange
var inputData = new[] { 1.0, -1.0 };
//act
var gainMean = inputData.GainMean();
//assert
Assert.AreEqual(1.0, gainMean);
}
public void returns_NaN_when_all_input_is_negative()
{
//arrange
var inputData = new[] { -1.0, -2.0, -3.0 };
//act
var gainMean = inputData.GainMean();
//assert
Assert.AreEqual(double.NaN, gainMean);
}
public void returns_zero_when_its_the_only_data()
{
//arrange
var inputData = new[] { 0.0 };
//act
var gainMean = inputData.GainMean();
//assert
Assert.AreEqual(0.0, gainMean);
}
public void returns_same_as_mean_when_all_values_are_positive()
{
//arrange
var inputData = new[] { 1.0, 2.0, 3.0 };
var mean = inputData.Mean();
//act
var gainMean = inputData.GainMean();
//assert
Assert.AreEqual(mean, gainMean);
}
public void throws_when_input_data_is_null() //assert
{
//arrange
var inputData = new[] { 1.0 };
inputData = null;
//act
inputData.GainMean();
}
