def test_longitudes_are_returned(self, Orbital, compute_pixels, get_lonlatalt, SatelliteInterpolator):
        """Check that latitudes are returned properly."""
        self._prepare_mocks(Orbital, SatelliteInterpolator, get_lonlatalt)
        dataset_id = make_dataid(name='longitude')
        result = self._get_dataset(dataset_id)
        assert (result == self.fake_lons).all()