public void UseCase_ComplexDerivedSystemAsFunction()
{
// TODO: Replace with new (easier to use) MathFunction class instead of MathSystem
_p.KeepTrack = false;
MathSystem s = _p.CurrentSystem;
Signal x = Binder.CreateSignal(); x.Label = "x";
Signal x2 = StdBuilder.Square(x); x2.Label = "x2";
Signal secx2 = StdBuilder.Secant(x2); secx2.Label = "secx2";
Signal diff = Std.Derive(secx2, x); diff.Label = "diff1";
s.AddSignalTree(diff, true, true);
s.RemoveUnusedObjects();
Assert.AreEqual("2*sec(sqr(x))*tan(sqr(x))*x", _f.Format(diff, FormattingOptions.Compact), "Formatted Diff A");
Assert.AreEqual(1, s.InputCount, "Input Signal Count A");
Assert.AreEqual(1, s.OutputCount, "Output Signal Count A");
Assert.AreEqual(0, s.BusCount, "Bus Count A");
Assert.AreEqual(6, s.SignalCount, "Signal Count A");
Assert.AreEqual(4, s.PortCount, "Port Count A");
Signal diff2 = Std.AutoSimplify(diff);
s.UnpromoteAsOutput(diff);
s.AddSignalTree(diff2, true, true);
s.RemoveUnusedObjects();
Assert.AreEqual("2*sec(sqr(x))*tan(sqr(x))*x", _f.Format(diff2, FormattingOptions.Compact), "Formatted Diff B");
Assert.AreEqual(1, s.InputCount, "Input Signal Count B");
Assert.AreEqual(1, s.OutputCount, "Output Signal Count B");
Assert.AreEqual(0, s.BusCount, "Bus Count B");
Assert.AreEqual(6, s.SignalCount, "Signal Count B");
Assert.AreEqual(4, s.PortCount, "Port Count B");
IValueStructure vs = s.Evaluate(ComplexValue.I)[0];
Assert.IsInstanceOfType(typeof(ComplexValue), vs, "Result is complex.");
ComplexValue cv = (ComplexValue)vs;
Assert.AreEqual(0, Math.Round(cv.RealValue, 4), "Real Result");
Assert.AreEqual(-5.7649, Math.Round(cv.ImaginaryValue, 4), "Imag Result");
}