public void TestCalculateGroupDelay()
{
double[] phase =
{
221.651357700633e-003,
236.404025345054e-003,
251.454348329399e-003,
265.834661679128e-003,
277.712938087876e-003,
283.814953936594e-003,
278.669273726763e-003,
254.100812809699e-003,
200.484690747697e-003,
112.629294062348e-003,
967.819685380718e-015,
-111.610456260826e-003,
-197.701817968959e-003,
-250.729276954184e-003,
-276.409200554505e-003,
-283.872819775752e-003,
-280.637306255616e-003,
-271.705281042254e-003,
-260.095771586513e-003,
-247.532299129978e-003,
-234.956640702564e-003
};
double[] frequencies =
{
900,
910,
920,
930,
940,
950,
960,
970,
980,
990,
1000,
1010,
1020,
1030,
1040,
1050,
1060,
1070,
1080,
1090,
1100
};
double[] target =
{
-229.465918533212e-006,
-238.926661113766e-006,
-237.668739549207e-006,
-215.364054404027e-006,
-154.259961127109e-006,
-25.6450909504240e-006,
211.328302694609e-006,
597.714355880440e-006,
1.12595107555368e-003,
1.64674321357226e-003,
1.86404323386552e-003,
1.61855652428749e-003,
1.10370485752431e-003,
602.389383386658e-006,
240.470529725761e-006,
17.1697415512031e-006,
-107.072059136385e-006,
-169.426100432009e-006,
-195.679681710948e-006,
-201.814527319348e-006,
-197.237014407641e-006
};
var result = Dsp.CalculateGroupDelay(frequencies, phase).ToReadOnlyList();
FilterAssert.ListsAreReasonablyClose(target, result, 1e-4);
var p2 = new[] { 4.0, 5, 6, 7 };
result = Dsp.CalculateGroupDelay(frequencies, p2).ToReadOnlyList();
Assert.That(result.Count == p2.Length);
Assert.That(Dsp.CalculateGroupDelay(new List <double>(), phase).ToReadOnlyList().Count == 0);
Assert.That(Dsp.CalculateGroupDelay(frequencies, new List <double>()).ToReadOnlyList().Count == 0);
Assert.Throws <ArgumentNullException>(() => Dsp.CalculateGroupDelay(frequencies, null).ToReadOnlyList());
Assert.Throws <ArgumentNullException>(() => Dsp.CalculateGroupDelay(null, phase).ToReadOnlyList());
}