def test_negativeClimbs(self):
        """
        Climbs can have negative values, and still report that value
        in meters per second and when converted to floats.
        """
        climb = base.Climb(-42.)
        self.assertEqual(climb.inMetersPerSecond, -42.)
        self.assertEqual(float(climb), -42.)

        Climbs can have negative values, and still report that value
        in meters per second and when converted to floats.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/positioning/test/test_base.py