public void CheckForReturnedLength()
        {
            int[] arr = { 0, 0, 1, 1, 1, 2, 2, 3, 3, 4 };

            var result = new RemoveDuplicateElements().GetLengthAfterRemovingDuplicateElements(arr);

            Assert.Equal(5, result.Length);
        }
        public void CheckForReturnedLength_SimplerVersion()
        {
            int[] arr = { 0, 0, 1, 1, 1, 2, 2, 3, 3, 4 };

            var result = new RemoveDuplicateElements().RemoveDuplicateSimplerVersion(arr);

            Assert.Equal(5, result);
        }