old_contents: import unittest
  
  from bracket_push import is_paired
  
  
  # Tests adapted from `problem-specifications//canonical-data.json` @ v1.4.0
  
  class BracketPushTest(unittest.TestCase):
      def test_paired_square_brackets(self):
          self.assertEqual(is_paired("[]"), True)
  
      def test_empty_string(self):
          self.assertEqual(is_paired(""), True)
  
      def test_unpaired_brackets(self):
          self.assertEqual(is_paired("[["), False)
  
      def test_wrong_ordered_brackets(self):
          self.assertEqual(is_paired("}{"), False)
  
      def test_wrong_closing_bracket(self):
          self.assertEqual(is_paired("{]"), False)
  
      def test_paired_with_whitespace(self):
          self.assertEqual(is_paired("{ }"), True)
  
      def test_partially_paired_brackets(self):
          self.assertEqual(is_paired("{[])"), False)
  
      def test_simple_nested_brackets(self):
          self.assertEqual(is_paired("{[]}"), True)
  
      def test_several_paired_brackets(self):
          self.assertEqual(is_paired("{}[]"), True)
  
      def test_paired_and_nested_brackets(self):
          self.assertEqual(is_paired("([{}({}[])])"), True)
  
      def test_unopened_closing_brackets(self):
          self.assertEqual(is_paired("{[)][]}"), False)
  
      def test_unpaired_and_nested_brackets(self):
          self.assertEqual(is_paired("([{])"), False)
  
      def test_paired_and_wrong_nested_brackets(self):
          self.assertEqual(is_paired("[({]})"), False)
  
      def test_paried_and_incomplete_brackets(self):
          self.assertEqual(is_paired("{}["), False)
  
      def test_math_expression(self):
          self.assertEqual(
              is_paired("(((185 + 223.85) * 15) - 543)/2"), True)
  
      def test_complex_latex_expression(self):
          self.assertEqual(
              is_paired(
                  ("\\left(\\begin{array}{cc} \\frac{1}{3} & x\\\\ \\mathrm{e}^{"
                   "x} &... x^2 \\end{array}\\right)")), True)
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  
  from bracket_push import is_paired
  
  
  # Tests adapted from `problem-specifications//canonical-data.json` @ v1.5.0
  
  class BracketPushTest(unittest.TestCase):
      def test_paired_square_brackets(self):
          self.assertEqual(is_paired("[]"), True)
  
      def test_empty_string(self):
          self.assertEqual(is_paired(""), True)
  
      def test_unpaired_brackets(self):
          self.assertEqual(is_paired("[["), False)
  
      def test_wrong_ordered_brackets(self):
          self.assertEqual(is_paired("}{"), False)
  
      def test_wrong_closing_bracket(self):
          self.assertEqual(is_paired("{]"), False)
  
      def test_paired_with_whitespace(self):
          self.assertEqual(is_paired("{ }"), True)
  
      def test_partially_paired_brackets(self):
          self.assertEqual(is_paired("{[])"), False)
  
      def test_simple_nested_brackets(self):
          self.assertEqual(is_paired("{[]}"), True)
  
      def test_several_paired_brackets(self):
          self.assertEqual(is_paired("{}[]"), True)
  
      def test_paired_and_nested_brackets(self):
          self.assertEqual(is_paired("([{}({}[])])"), True)
  
      def test_unopened_closing_brackets(self):
          self.assertEqual(is_paired("{[)][]}"), False)
  
      def test_unpaired_and_nested_brackets(self):
          self.assertEqual(is_paired("([{])"), False)
  
      def test_paired_and_wrong_nested_brackets(self):
          self.assertEqual(is_paired("[({]})"), False)
  
      def test_paried_and_incomplete_brackets(self):
          self.assertEqual(is_paired("{}["), False)
  
      def test_too_many_closing_brackets(self):
          self.assertEqual(is_paired('[]]'), False)
  
      def test_math_expression(self):
          self.assertEqual(
              is_paired("(((185 + 223.85) * 15) - 543)/2"), True)
  
      def test_complex_latex_expression(self):
          self.assertEqual(
              is_paired(
                  ("\\left(\\begin{array}{cc} \\frac{1}{3} & x\\\\ \\mathrm{e}^{"
                   "x} &... x^2 \\end{array}\\right)")), True)
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: update tests to v1.5.0 (#1609)