public void QuaternionConjugateTest1()
{
Quaternion a = new Quaternion(1, 2, 3, 4);
Quaternion expected = new Quaternion(-1, -2, -3, 4);
Quaternion actual;
actual = Quaternion.Conjugate(a);
Assert.True(MathHelper.Equal(expected, actual), $"Quaternion.Conjugate did not return the expected value: expected {expected} actual {actual}");
}