public void PlaneDotTest() { PlaneD target = new PlaneD(2, 3, 4, 5); Vector4D value = new Vector4D(5, 4, 3, 2); double expected = 10 + 12 + 12 + 10; double actual = PlaneD.Dot(target, value); Assert.True(MathHelper.Equal(expected, actual), "PlaneD.Dot returns unexpected value."); }