@Test
public void testDiagonalMatrix() {
DiagonalMatrix d = DiagonalMatrix.create(1, 2);
Matrix22 m = new Matrix22(1, 2, 3, 4);
assertEquals(new Matrix22(1, 2, 6, 8), d.compose(m));
assertEquals(new Matrix22(1, 4, 3, 8), m.compose(d));
}
@Test
public void testMatrixFromDoubles() {