Skipped PostGIS version tests when psycopg2 not installed

import unittest

from django.contrib.gis.db.backends.postgis.operations import PostGISOperations

from django.core.exceptions import ImproperlyConfigured

from django.db import ProgrammingError

try:

    from django.contrib.gis.db.backends.postgis.operations import PostGISOperations

    HAS_POSTGRES = True

except ImportError:

    HAS_POSTGRES = False

if HAS_POSTGRES:

    class FakeConnection(object):

        def __init__(self):

            self.settings_dict = {

                raise NotImplementedError('This function was not expected to be called')

@unittest.skipUnless(HAS_POSTGRES, "The psycopg2 driver is needed for these tests")

class TestPostgisVersionCheck(unittest.TestCase):

    """

    Tests that the postgis version check parses correctly the version numbers