@Test
public void testComputeMph() {

    double mph = MphChlUtils.computeMph(1, 2, 3, 6, 4, 5);
    assertEquals(-3, mph, 1e-8);
    mph = MphChlUtils.computeMph(0, 2, 3, 6, 4, 5);
    assertEquals(-4, mph, 1e-8);
    mph = MphChlUtils.computeMph(1, 0, 3, 6, 4, 5);
    assertEquals(-5, mph, 1e-8);
    mph = MphChlUtils.computeMph(1, 2, 0, 6, 4, 5);
    assertEquals(3, mph, 1e-8);
    mph = MphChlUtils.computeMph(1, 2, 3, 6, 0, 5);
    assertEquals(-2.2, mph, 1e-8);
    mph = MphChlUtils.computeMph(1, 2, 3, 6, 4, 0);
    assertEquals(-0.5, mph, 1e-8);
    mph = MphChlUtils.computeMph(1, 2, 3, 0, 4, 5);
    assertEquals(3.0, mph, 1e-8);
}