public void BasicTests()
 {
     Assert.AreEqual(0, Kata.CountInversions(new int[] { 1, 2, 3 }), "Sorted array has 0 inversions");
     Assert.AreEqual(1, Kata.CountInversions(new int[] { 2, 1, 3 }), "Array [2,1,3] only has one inversion");
 }