def test_insertion_sort_reflexive(self):
     assert insertion_sort(insertion_sort(self.standard_list)) == insertion_sort(self.standard_list)
     assert insertion_sort(insertion_sort(self.negative_list)) == insertion_sort(self.negative_list)
     assert insertion_sort(insertion_sort([])) == insertion_sort([])
 def test_insertion_sort_functionality(self):
     assert insertion_sort(self.standard_list) == sorted(self.standard_list)
     assert insertion_sort(self.negative_list) == sorted(self.negative_list)
 def test_insertion_sort_edge_cases(self):
     assert insertion_sort([]) == sorted([])
     assert insertion_sort([0]) == sorted([0])
     assert insertion_sort([0, 0]) == sorted([0, 0])
     assert insertion_sort([0, 0, 0]) == sorted([0, 0, 0])