text: import unittest
  
  
  class TestSortedByTimestamp(unittest.TestCase):
      def test_sorted_by_timestamp(self):
          # self.assertEqual(expected, sorted_by_timestamp(objects))
          assert False  # TODO: implement your test here
  
  class TestOlderThan(unittest.TestCase):
      def test_older_than(self):
          # self.assertEqual(expected, older_than(events, reference_timestamp))
          assert False  # TODO: implement your test here
  
  class TestNewerThan(unittest.TestCase):
      def test_newer_than(self):
          # self.assertEqual(expected, newer_than(events, reference_timestamp))
          assert False  # TODO: implement your test here
  
  class TestTopCaller(unittest.TestCase):
      def test_top_caller(self):
          # self.assertEqual(expected, top_caller(call))
          assert False  # TODO: implement your test here
  
  class TestSubcallsBeforeTimestamp(unittest.TestCase):
      def test_subcalls_before_timestamp(self):
          # self.assertEqual(expected, subcalls_before_timestamp(call, reference_timestamp))
          assert False  # TODO: implement your test here
  
  class TestCallsBefore(unittest.TestCase):
      def test_calls_before(self):
          # self.assertEqual(expected, calls_before(call))
          assert False  # TODO: implement your test here
  
  class TestSideEffectsOf(unittest.TestCase):
      def test_side_effects_of(self):
          # self.assertEqual(expected, side_effects_of(calls))
          assert False  # TODO: implement your test here
  
  class TestSideEffectsBefore(unittest.TestCase):
      def test_side_effects_before(self):
          # self.assertEqual(expected, side_effects_before(call))
          assert False  # TODO: implement your test here
  
  class TestObjectsAffectedBySideEffects(unittest.TestCase):
      def test_objects_affected_by_side_effects(self):
          # self.assertEqual(expected, objects_affected_by_side_effects(side_effects))
          assert False  # TODO: implement your test here
  
  class TestResolveDependencies(unittest.TestCase):
      def test_resolve_dependencies(self):
          # self.assertEqual(expected, resolve_dependencies(events))
          assert False  # TODO: implement your test here
  
  if __name__ == '__main__':
      unittest.main()
  