text: from challenges.Merge_Sort.merge_sort import merge_sort
  
  def test_merging():
      input=[20,18,12,8,5,-2]
      actual=merge_sort(input)
      excepted=[-2, 5, 8, 12, 18, 20]
      assert actual==excepted
  
  def test_few_uniques():
      input=[5,12,7,5,5,7]
      actual=merge_sort(input)
      excepted=[5, 5, 5, 7, 7, 12]
      assert actual==excepted
  
  def test_nearly_sorted():
      input=[2,3,5,7,13,11]
      actual=merge_sort(input)
      excepted=[2, 3, 5, 7, 11, 13]
      assert actual==excepted
  
  
  
  