public void testScalarMultiplyInf() {
Complex z = new Complex(1, 1);
Complex w = z.multiply(Double.POSITIVE_INFINITY);
assertEquals(w.getReal(), inf, 0);
assertEquals(w.getImaginary(), inf, 0);
w = z.multiply(Double.NEGATIVE_INFINITY);
assertEquals(w.getReal(), inf, 0);
assertEquals(w.getImaginary(), inf, 0);
}
public void testDivideNaNInf() {
Complex z = oneInf.divide(Complex.ONE);
assertTrue(Double.isNaN(z.getReal()));
assertEquals(inf, z.getImaginary(), 0);
z = negInfNegInf.divide(oneNaN);
assertTrue(Double.isNaN(z.getReal()));
assertTrue(Double.isNaN(z.getImaginary()));
z = negInfInf.divide(Complex.ONE);
assertTrue(Double.isNaN(z.getReal()));
assertTrue(Double.isNaN(z.getImaginary()));
}
public void testAdd() {
Complex x = new Complex(3.0, 4.0);
Complex y = new Complex(5.0, 6.0);
Complex z = x.add(y);
assertEquals(8.0, z.getReal(), 1.0e-5);
assertEquals(10.0, z.getImaginary(), 1.0e-5);
}
public void testSubtract() {
Complex x = new Complex(3.0, 4.0);
Complex y = new Complex(5.0, 6.0);
Complex z = x.subtract(y);
assertEquals(-2.0, z.getReal(), 1.0e-5);
assertEquals(-2.0, z.getImaginary(), 1.0e-5);
}
public void testScalarMultiply() {
Complex x = new Complex(3.0, 4.0);
double y = 2.0;
Complex z = x.multiply(y);
assertEquals(6.0, z.getReal(), 1.0e-5);
assertEquals(8.0, z.getImaginary(), 1.0e-5);
}
public void testMultiply() {
Complex x = new Complex(3.0, 4.0);
Complex y = new Complex(5.0, 6.0);
Complex z = x.multiply(y);
assertEquals(-9.0, z.getReal(), 1.0e-5);
assertEquals(38.0, z.getImaginary(), 1.0e-5);
}
public void testDivide() {
Complex x = new Complex(3.0, 4.0);
Complex y = new Complex(5.0, 6.0);
Complex z = x.divide(y);
assertEquals(39.0 / 61.0, z.getReal(), 1.0e-5);
assertEquals(2.0 / 61.0, z.getImaginary(), 1.0e-5);
}
public void testAddNaN() {
Complex x = new Complex(3.0, 4.0);
Complex z = x.add(Complex.NaN);
assertTrue(z.isNaN());
z = new Complex(1, nan);
Complex w = x.add(z);
assertEquals(w.getReal(), 4.0, 0);
assertTrue(Double.isNaN(w.getImaginary()));
}
public void testMultiplyNaNInf() {
Complex z = new Complex(1, 1);
Complex w = z.multiply(infOne);
assertEquals(w.getReal(), inf, 0);
assertEquals(w.getImaginary(), inf, 0);
// [MATH-164]
assertTrue(new Complex(1, 0).multiply(infInf).equals(Complex.INF));
assertTrue(new Complex(-1, 0).multiply(infInf).equals(Complex.INF));
assertTrue(new Complex(1, 0).multiply(negInfZero).equals(Complex.INF));
w = oneInf.multiply(oneNegInf);
assertEquals(w.getReal(), inf, 0);
assertEquals(w.getImaginary(), inf, 0);
w = negInfNegInf.multiply(oneNaN);
assertTrue(Double.isNaN(w.getReal()));
assertTrue(Double.isNaN(w.getImaginary()));
}
public void testDivideInfinite() {
Complex x = new Complex(3, 4);
Complex w = new Complex(neginf, inf);
assertTrue(x.divide(w).equals(Complex.ZERO));
Complex z = w.divide(x);
assertTrue(Double.isNaN(z.getReal()));
assertEquals(inf, z.getImaginary(), 0);
w = new Complex(inf, inf);
z = w.divide(x);
assertTrue(Double.isNaN(z.getImaginary()));
assertEquals(inf, z.getReal(), 0);
w = new Complex(1, inf);
z = w.divide(w);
assertTrue(Double.isNaN(z.getReal()));
assertTrue(Double.isNaN(z.getImaginary()));
}
public void testAddInfinite() {
Complex x = new Complex(1, 1);
Complex z = new Complex(inf, 0);
Complex w = x.add(z);
assertEquals(w.getImaginary(), 1, 0);
assertEquals(inf, w.getReal(), 0);
x = new Complex(neginf, 0);
assertTrue(Double.isNaN(x.add(z).getReal()));
}
private static boolean closeFourDigit(Complex a, Complex b) {
return closeFourDigit(a.getReal(), b.getReal())
&& closeFourDigit(a.getImaginary(), b.getImaginary());
}
public void evaluateAt(Complex var, Complex res) {
res.setValue(var.getImaginary(), var.getReal());
}
public TestComplex(Complex other) {
this(other.getReal(), other.getImaginary());
}
public void testConstructor() {
Complex z = new Complex(3.0, 4.0);
assertEquals(3.0, z.getReal(), 1.0e-5);
assertEquals(4.0, z.getImaginary(), 1.0e-5);
}
public void testNegate() {
Complex x = new Complex(3.0, 4.0);
Complex z = x.negate();
assertEquals(-3.0, z.getReal(), 1.0e-5);
assertEquals(-4.0, z.getImaginary(), 1.0e-5);
}