public void Swap(char[] value, char[] expected)
 {
     CharHelpers.Swap(ref value[0], ref value[1]);
     Assert.AreEqual(expected, value);
 }
 public void Reverse(char[] value, int startIndex, int endIndex, char[] expected)
 {
     CharHelpers.Reverse(value, startIndex, endIndex);
     Assert.AreEqual(expected, value);
 }