internal void CalculateAnlog_CorrectlyCalculatesTheZCoefficient_TesT(
int order, [Frozen] Mock <IPolesCoefficientsFactory> polesCoefficientFactory,
ButterworthAnalog butterworthAnalog)
{
butterworthAnalog.CalculateAnalog(order);
polesCoefficientFactory.Verify(
mock => mock.Build(It.IsAny <double>(), It.IsAny <IReadOnlyList <Complex> >(), new List <Complex>()),
Times.Once);
}
internal void CalculateAnalog_SetsTheCoefficientsPropertyToTheBuiltCoefficients_Test(
int order, [Frozen] Mock <IPolesCoefficientsFactory> polesCoefficientsFactory,
IPolesCoefficients polesCoefficients, ButterworthAnalog butterworthAnalog)
{
polesCoefficientsFactory.Setup(
mock =>
mock.Build(It.IsAny <double>(), It.IsAny <IReadOnlyList <Complex> >(),
It.IsAny <IReadOnlyList <Complex> >())).Returns(polesCoefficients);
butterworthAnalog.CalculateAnalog(order);
Assert.Equal(polesCoefficients, butterworthAnalog.Coefficients);
}
internal void CalculateAnalog_CorrectlyCalculatesThePCoefficient_Test(
int order, [Frozen] Mock <IPolesCoefficientsFactory> polesCoefficientsFactory,
ButterworthAnalog butterworthAnalog)
{
var expected = new List <Complex>();
var start = -order + 1;
for (var i = 0; i < order; i++, start += 2)
{
expected.Add(-Complex.Exp(new Complex(0.0d, 1.0d) * Math.PI * start / (2 * order)));
}
butterworthAnalog.CalculateAnalog(order);
polesCoefficientsFactory.Verify(
mock => mock.Build(It.IsAny <double>(), expected, It.IsAny <IReadOnlyList <Complex> >()), Times.Once);
}
internal void CalculateAnalog_ThrowsExceptionIfOrderIsLessThanOne_Test(
int order, ButterworthAnalog butterworthAnalog)
{
Assert.Throws <ArgumentOutOfRangeException>(() => butterworthAnalog.CalculateAnalog(order));
}