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import sys
import unittest
from django.core.exceptions import ImproperlyConfigured
from django.db import ProgrammingError
from django.utils import six
try:
from django.contrib.gis.db.backends.postgis.operations import PostGISOperations
HAS_POSTGRES = True
except ImportError:
HAS_POSTGRES = False
except ImproperlyConfigured as e:
# If psycopg is installed but not geos, the import path hits
# django.contrib.gis.geometry.backend which will "helpfully" convert
# an ImportError into an ImproperlyConfigured.
# Here, we make sure we're only catching this specific case and not another
# ImproperlyConfigured one.
if e.args and e.args[0].startswith('Could not import user-defined GEOMETRY_BACKEND'):
HAS_POSTGRES = False
else:
six.reraise(*sys.exc_info())
if HAS_POSTGRES:
class FakeConnection(object):
def __init__(self):
self.settings_dict = {
'NAME': 'test',
}
class FakePostGISOperations(PostGISOperations):
def __init__(self, version=None):
self.version = version
self.connection = FakeConnection()
def _get_postgis_func(self, func):
if func == 'postgis_lib_version':
if self.version is None:
raise ProgrammingError
else:
return self.version
elif func == 'version':
pass
else:
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
"""
def test_get_version(self):
expect = '1.0.0'
ops = FakePostGISOperations(expect)
actual = ops.postgis_lib_version()
self.assertEqual(expect, actual)
def test_version_classic_tuple(self):
expect = ('1.2.3', 1, 2, 3)
ops = FakePostGISOperations(expect[0])
actual = ops.postgis_version_tuple()
self.assertEqual(expect, actual)
def test_version_dev_tuple(self):
expect = ('1.2.3dev', 1, 2, 3)
ops = FakePostGISOperations(expect[0])
actual = ops.postgis_version_tuple()
self.assertEqual(expect, actual)
def test_valid_version_numbers(self):
versions = [
('1.3.0', 1, 3, 0),
('2.1.1', 2, 1, 1),
('2.2.0dev', 2, 2, 0),
]
for version in versions:
ops = FakePostGISOperations(version[0])
actual = ops.spatial_version
self.assertEqual(version[1:], actual)
def test_invalid_version_numbers(self):
versions = ['nope', '123']
for version in versions:
ops = FakePostGISOperations(version)
self.assertRaises(Exception, lambda: ops.spatial_version)
def test_no_version_number(self):
ops = FakePostGISOperations()
self.assertRaises(ImproperlyConfigured, lambda: ops.spatial_version)
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