public void ParseTest_Success3()
{
//arrange
CPolynomial expected = new CPolynomial(new Complex[] { 0, 2 });
//action
CPolynomial actual = CPolynomial.Parse("2x");
//assert
actual.Should().Be(expected);
}
public void ParseTest_Success5()
{
//arrange
CPolynomial expected = new CPolynomial(new Complex[] { 3, new Complex(-4, 12.3), 1 });
//action
CPolynomial actual = CPolynomial.Parse("x+3 + x^2-(5-12.3i)*x");
//assert
actual.Should().Be(expected);
}
public void ParseTest_Success2()
{
//arrange
CPolynomial expected = new CPolynomial(new Complex[] { new Complex(0, -0.3) });
//action
CPolynomial actual = CPolynomial.Parse("-0.3i");
//assert
actual.Should().Be(expected);
}
public void SecondDerivativeTest_Analytical()
{
//arrange
CPolynomial target = new CPolynomial(new Complex[] { 5, 8, -14, 3, 6, -22 });
CPolynomial expected = new CPolynomial(new Complex[] { -28, 18, 72, -440 });
//action
CPolynomial actual = target.SecondDerivative();
//assert
actual.Should().Be(expected);
}
public void FirstDerivativeTest_Analytical()
{
//arrange
CPolynomial target = new CPolynomial(new Complex[] { 5, 8, -14, 3, 6, -22 });
CPolynomial expected = new CPolynomial(new Complex[] { 8, -28, 9, 24, -110 });
//action
CPolynomial actual = target.FirstDerivative();
//assert
actual.Should().Be(expected);
}
public void AntiderivativeTest()
{
//arrange
CPolynomial target = new CPolynomial(new Complex[] { 3, 8, 16 });
CPolynomial expected = new CPolynomial(new Complex[] { 0, 3, 4, 16.0 / 3 });
//action
CPolynomial actual = target.Antiderivative();
//assert
actual.Should().Be(expected);
}
public void NthDerivativeTest_Analytical()
{
//arrange
CPolynomial target = new CPolynomial(new Complex[] { 5, 8, -14, 3, 6, -22 });
CPolynomial expected = new CPolynomial(new Complex[] { 18, 144, -1320 });
//action
CPolynomial actual = target.NthDerivative(3);
//assert
actual.Should().Be(expected);
}
public void DivBinomTest()
{
//arrange
double TOL = 1E-10;
CPolynomial f = new CPolynomial(new Complex[] { 3, 0.2, new Complex(3, 8.2), -0.16, new Complex(2.3, 2), 0, 18.3466, 2000 });
Complex c = 346.34645;
Complex r, rtest;
//action
CPolynomial q = CPolynomial.DivBinom(f, c, out r);
f[0] -= r;
CPolynomial qtest = CPolynomial.DivBinom(f, c, out rtest);
//assert
Complex.Abs(rtest).Should().BeLessOrEqualTo(TOL);
q.Should().Be(qtest);
}
public void DivTest()
{
//arrange
double TOL = 1E-12;
CPolynomial f = new CPolynomial(new Complex[] { new Complex(3467.2, 456), new Complex(2.225, -0.0123), new Complex(46.2, 4.24), new Complex(2, 2), new Complex(12.8, 16.3), new Complex(0, 0), new Complex(22, 347) });
CPolynomial g = new CPolynomial(new Complex[] { new Complex(3, 8.5), new Complex(11, -0.5), new Complex(0, 1), new Complex(1, 2), new Complex(346, 4.365) });
CPolynomial zero = new CPolynomial(1);
CPolynomial r;
CPolynomial q = CPolynomial.Divide(f, g, out r);
CPolynomial rtest = new CPolynomial(1);
//action
CPolynomial qtest = CPolynomial.Divide(f - r, g, out rtest);
//assert
for (int j = 0; j < rtest.Length; j++)
{
Complex.Abs(rtest[j]).Should().BeLessOrEqualTo(TOL);
}
qtest.Should().Be(q);
}