def METHOD_NAME(self):
    """Test the num_active_contributors util method."""
    start_date = self.start_date
    self.assertEqual(3, num_active_contributors(from_date=start_date, locale="en-US"))
    self.assertEqual(4, num_active_contributors(from_date=start_date, locale="es"))
    self.assertEqual(6, num_active_contributors(from_date=start_date))
    self.assertEqual(1, num_active_contributors(from_date=start_date, product=self.product))
    self.assertEqual(
        1, num_active_contributors(from_date=start_date, locale="en-US", product=self.product)
    )
    self.assertEqual(
        0, num_active_contributors(from_date=start_date, locale="es", product=self.product)
    )