def test_average_miles_per_hour_returns_none_when_no_finish(self):
# Arrange
start = datetime.now(pytz.utc)
# Act
avg_mph = compute.average_miles_per_hour(start, None, 10)
# Assert
self.assertEqual(None, avg_mph)
def test_average_miles_per_hour_returns_expected_6_8182mph_50y_in_15s(self):
# Arrange
start = datetime.now(pytz.utc)
finish = start + timedelta(seconds=15)
# Act
avg_mph = compute.average_miles_per_hour(start, finish, 50)
# Assert
self.assertEqual(6.8182, avg_mph)
