public void FailWhenGivenANegativeInteger()
{
var function = new GammaFunction();
var inputs = function.GetInputs();
Assert.Throws <ArgumentException>(() =>
{
inputs[0].Value = -5;
});
}
public void SuccessfullyReturnValueGivenAPositiveInteger()
{
var function = new GammaFunction();
var inputs = function.GetInputs();
Assert.Single(inputs);
inputs[0].Value = 5;
var result = function.Calculate(inputs);
Assert.NotNull(result);
Assert.Collection(result,
i =>
{
Assert.Equal(typeof(double), i.Value.GetType());
Assert.Equal(24, TypeConverter.ToObject <int>(i.Value));
});
}
public void SuccessfullyReturnNaNGivenZero()
{
var function = new GammaFunction();
var inputs = function.GetInputs();
Assert.Single(inputs);
inputs[0].Value = 0;
var result = function.Calculate(inputs);
Assert.NotNull(result);
Assert.Collection(result,
i =>
{
Assert.Equal(typeof(double), i.Value.GetType());
Assert.True(Double.IsNaN(TypeConverter.ToObject <double>(i.Value)));
});
}