code: def test_fix_line():
      baseline = np.array([[10, 10], [0, 0], [0, 10], [10, 0]])
      vertical_line = [
          (baseline + [0, 0], "a"),
          (baseline + [0, 30], "d"),
          (baseline + [0, 20], "c"),
          (baseline + [0, 10], "b"),
      ]
      horizontal_line = [
          (baseline + [0, 0], "a"),
          (baseline + [30, 0], "d"),
          (baseline + [20, 0], "c"),
          (baseline + [10, 0], "b"),
      ]
      vertical_line_fixed = tools.fix_line(vertical_line)
      horizontal_line_fixed = tools.fix_line(horizontal_line)
      assert horizontal_line_fixed[1] == "horizontal"
      assert vertical_line_fixed[1] == "vertical"
      assert (
          "".join(
              [character for _, character in vertical_line_fixed[0]]
          )
          == "abcd"
      )
      assert (
          "".join(
              [character for _, character in horizontal_line_fixed[0]]
          )
          == "abcd"
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_fix_line() without return types