text: # Licensed under a 3-clause BSD style license - see LICENSE.rst
  from __future__ import absolute_import, division, print_function, unicode_literals
  import numpy as np
  from astropy.coordinates import Angle
  from ...astro.population import make_catalog_random_positions_sphere
  from ...catalog import catalog_xmatch_circle
  
  
  def test_catalog_xmatch_circle():
      random_state = np.random.RandomState(seed=0)
  
      catalog = make_catalog_random_positions_sphere(size=100, center='Milky Way',
                                                     random_state=random_state)
      catalog['Source_Name'] = ['source_{:04d}'.format(_) for _ in range(len(catalog))]
      catalog['Association_Radius'] = Angle(random_state.uniform(0, 10, len(catalog)), unit='deg')
      other_catalog = make_catalog_random_positions_sphere(size=100, center='Milky Way',
                                                           random_state=random_state)
      other_catalog['Source_Name'] = ['source_{:04d}'.format(_) for _ in range(len(other_catalog))]
      result = catalog_xmatch_circle(catalog, other_catalog)
      assert len(result) == 23
  