old_contents: from lexos.processors.prepare.cutter import cut_by_milestone
  
  
  class TestMileStone:
      def test_milestone_regular(self):
          text_content = "Today is raining."
          milestone = "is"
          assert cut_by_milestone(text_content, milestone) == ["Today ", " raining."]
  
      def test_milestone_no_milestone_in_text(self):
          text_content = "Today is raining."
          milestone = "am"
          assert cut_by_milestone(text_content, milestone) == ["Today is raining."]
  
      def test_milestone_longer_than_text(self):
          text_content = "Today is raining."
          milestone = "Today is still raining."
          assert cut_by_milestone(text_content, milestone) == ["Today is raining."]
  
      def test_milestone_len_zero(self):
          text_content = "Today is raining."
          milestone = ""
          assert cut_by_milestone(text_content, milestone) == ["Today is raining."]
  
      def test_milestone_empty_text(self):
          text_content = ""
          milestone = "is"
          assert cut_by_milestone(text_content, milestone) == []
  
new_contents: from lexos.processors.prepare.cutter import cut_by_milestone
  
  
  class TestMileStone:
      def test_milestone_regular(self):
          text_content = "Today is raining."
          milestone = "is"
          assert cut_by_milestone(text_content, milestone) == ["Today ",
                                                               " raining."]
  
      def test_milestone_no_milestone_in_text(self):
          text_content = "Today is raining."
          milestone = "am"
          assert cut_by_milestone(text_content, milestone) == ["Today is "
                                                               "raining."]
  
      def test_milestone_longer_than_text(self):
          text_content = "Today is raining."
          milestone = "Today is still raining."
          assert cut_by_milestone(text_content, milestone) == ["Today is "
                                                               "raining."]
  
      def test_milestone_len_zero(self):
          text_content = "Today is raining."
          milestone = ""
          assert cut_by_milestone(text_content, milestone) == ["Today is "
                                                               "raining."]
  
      def test_milestone_empty_text(self):
          text_content = ""
          milestone = "is"
          assert cut_by_milestone(text_content, milestone) == []
  
subject: revise the file test_cut_milestone.py