public void SetHarmonicKind_HarmonicPropertiesChangedAfterSetHarmonicKindWithNullObserver()
{
IHarmonic harmonic = new Harmonic();
harmonic.SetHarmonicKind(HarmonicKind.Sin);
Assert.AreEqual(HarmonicKind.Sin, harmonic.GetHarmonicKind());
}
