def METHOD_NAME(self):
    o = OpenOil(loglevel=0)
    o.add_readers_from_file(o.test_data_folder() +
        '../../opendrift/scripts/data_sources.txt')
    o.seed_elements(lon=14, lat=67.85, number=100, radius=1000,
                    time=datetime.now())
    o.run(steps=15)
    print (o)
    self.assertEqual(o.steps_calculation, 15)