old_contents: import os
  import urllib
  from xml.etree import ElementTree as ET
  from astropy.tests.helper import pytest
  from ...utils.testing_tools import MockResponse
  from ... import open_exoplanet_catalogue as oec
  
  @pytest.fixture(autouse=True)
  def patch_urlopen(request):
      mp = request.getfuncargvalue("monkeypatch")
      mp.setattr(urllib, 'urlopen', get_mock_return)
      return mp
  
  def get_mock_return(url, params=None, timeout=10,**kwargs):
      # dummy function to replace urllib get functionality
      # function returns what the http request would but with local data
      content = open(data_path('systems.xml.gz'), "r").read()
      return MockResponse(content, **kwargs)
  
  # get file path of a static data file for testing
  def data_path(filename):
      data_dir = os.path.join(os.path.dirname(__file__), 'data')
      return os.path.join(data_dir, filename)
  
  def test_function(patch_urlopen):
      cata = oec.get_catalogue()
      assert len(cata.findall('.//planet')) > 0
  
      kepler67b =  cata.find(".//planet[name='Kepler-67 b']")
      assert kepler67b.findtext('name') == "Kepler-67 b"
      assert kepler67b.findtext('discoverymethod') == "transit"
  
      kepler67 = cata.find(".//system[name='Kepler-67']")
      assert kepler67.findvalue('distance') == 1107
  
new_contents: import os
  import urllib
  from xml.etree import ElementTree as ET
  from astropy.tests.helper import pytest
  from ...utils.testing_tools import MockResponse
  from ... import open_exoplanet_catalogue as oec
  
  @pytest.fixture(autouse=True)
  def patch_urlopen(request):
      mp = request.getfuncargvalue("monkeypatch")
      mp.setattr(urllib, 'urlopen', get_mock_return)
      return mp
  
  def get_mock_return(url, params=None, timeout=10,**kwargs):
      # dummy function to replace urllib get functionality
      # function returns what the http request would but with local data
      content = open('data/systems.xml.gz', "r").read()
      return MockResponse(content, **kwargs)
  
  # get file path of a static data file for testing
  def data_path(filename):
      data_dir = os.path.join(os.path.dirname(__file__), 'data')
      return os.path.join(data_dir, filename)
  
  def test_function(patch_urlopen):
      cata = oec.get_catalogue()
      assert len(cata.findall('.//planet')) > 0
  
      kepler67b =  cata.find(".//planet[name='Kepler-67 b']")
      assert kepler67b.findtext('name') == "Kepler-67 b"
      assert kepler67b.findtext('discoverymethod') == "transit"
  
      kepler67 = cata.find(".//system[name='Kepler-67']")
      assert kepler67.findvalue('distance') == 1107
  
subject: Fix to local data filepath