public void GetSignal_ChangePhase_ChangesPhase()
{
PeriodicGenerator generator = MakeGenerator();
var observationTime = 1000;
var phaseModificator = 180d / 360d;
var signal = GeneratorHelpers.GetSignalSample(generator, observationTime);
generator.Phase += phaseModificator;
var changedSignal = GeneratorHelpers.GetSignalSample(generator, observationTime);
var result = true;
for (int i = 0; i < observationTime / 2; i++)
{
if (Math.Abs(signal[i] - changedSignal[i + observationTime / 2]) > 0.0000000001)
{
result = false;
}
if (Math.Abs(signal[i + observationTime / 2] - changedSignal[i]) > 0.0000000001)
{
result = false;
}
}
Assert.True(result);
}
public void GetSignal_ChangeAmplitude_ChangesAmplitude()
{
PeriodicGenerator generator = MakeGenerator();
var observationTime = 1000;
var amplitudeModificator = 5;
var signal = GeneratorHelpers.GetSignalSample(generator, observationTime);
generator.Amplitude *= amplitudeModificator;
var changedSignal = GeneratorHelpers.GetSignalSample(generator, observationTime);
var amplitudeBeforeChange = Math.Abs(signal.Min() - signal.Max());
var amplitudeAfterChange = Math.Abs(changedSignal.Min() - changedSignal.Max());
Assert.AreEqual(amplitudeBeforeChange, amplitudeAfterChange / amplitudeModificator);
}
public void GetSignal_ChangeFrequency_ChangesFrequency()
{
PeriodicGenerator generator = MakeGenerator();
var observationTime = 1000;
var frequencyModificator = 5;
var signal = GeneratorHelpers.GetSignalSample(generator, observationTime);
generator.Frequency *= frequencyModificator;
var changedSignal = GeneratorHelpers.GetSignalSample(generator, observationTime);
var extremaOfDefaultSignal = signal.Where(x => Math.Abs(x - signal.Max()) < 0.0000000001);
var extremaOfChangedSignal = changedSignal.Where(x => Math.Abs(x - changedSignal.Max()) < 0.0000000001);
var result = extremaOfDefaultSignal.Count() * frequencyModificator == extremaOfChangedSignal.Count();
Assert.True(result);
}
