@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
}
@Test
public void testGetParamMatrix() {
String[] params = new String[] {"A"};
ParametrisedPolynomial simplePoly = new ParametrisedPolynomial(params);
Double[][] paramMatrix = simplePoly.getParamMatrix();
assertTrue(paramMatrix[0][0] == 1.0);
assertTrue(paramMatrix.length == 1);
assertTrue(paramMatrix[0].length == 1);
String[] params2 = new String[] {"A", "B"};
ParametrisedPolynomial poly = new ParametrisedPolynomial(params2);
Double[][] paramMatrix2 = poly.getParamMatrix();
assertTrue(paramMatrix2[0][0] == 1.0);
assertTrue(paramMatrix2[0][1] == 0.0);
assertTrue(paramMatrix2[1][0] == 0.0);
assertTrue(paramMatrix2[1][1] == 1.0);
assertTrue(paramMatrix2.length == 2);
assertTrue(paramMatrix2[0].length == 2);
}