public void MergeSortTests(int[] arr, int item, bool expected)
        {
            var result = BinarySearch.Search(arr, item);

            Assert.IsTrue(result == expected);
        }
 public void Find_PassNullItem_ThrowsArgumentNullException()
 {
     Assert.Throws <ArgumentNullException>(() => BinarySearch.Search(null, 1));
 }