@Test
public void testSimpleDifferentiation() {
String[] params = new String[] {"A"};
ParametrisedPolynomial simplePoly = new ParametrisedPolynomial(params);
ParametrisedPolynomial diffedPoly = simplePoly.differentiate();
Double[][] paramMatrix = diffedPoly.getParamMatrix();
assertEquals(new Double(0.0), paramMatrix[0][0]);
}
@Test
public void testBiggerDifferentiation() {
String[] params = new String[] {"A", "B", "C"};
ParametrisedPolynomial simplePoly = new ParametrisedPolynomial(params);
ParametrisedPolynomial diffedPoly = simplePoly.differentiate();
Double[][] paramMatrix = diffedPoly.getParamMatrix();
assertEquals(new Double(2.0), paramMatrix[1][0]); // 2*A*x
assertEquals(new Double(1.0), paramMatrix[2][1]); // B
}