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import unittest
from django.core.exceptions import ImproperlyConfigured
from django.db import ProgrammingError
from django.db.backends.base.base import NO_DB_ALIAS
try:
from django.contrib.gis.db.backends.postgis.operations import PostGISOperations
HAS_POSTGRES = True
except ImportError:
HAS_POSTGRES = False
if HAS_POSTGRES:
class FakeConnection:
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 psycopg driver is needed for these tests")
class TestPostGISVersionCheck(unittest.TestCase):
"""
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_version_loose_tuple(self):
expect = ("1.2.3b1.dev0", 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:
with self.subTest(version=version):
ops = FakePostGISOperations(version[0])
actual = ops.spatial_version
self.assertEqual(version[1:], actual)
def test_no_version_number(self):
ops = FakePostGISOperations()
with self.assertRaises(ImproperlyConfigured):
ops.spatial_version
@unittest.skipUnless(HAS_POSTGRES, "PostGIS-specific tests.")
class TestPostGISBackend(unittest.TestCase):
def test_non_db_connection_classes(self):
from django.contrib.gis.db.backends.postgis.base import DatabaseWrapper
from django.db.backends.postgresql.features import DatabaseFeatures
from django.db.backends.postgresql.introspection import DatabaseIntrospection
from django.db.backends.postgresql.operations import DatabaseOperations
wrapper = DatabaseWrapper(settings_dict={}, alias=NO_DB_ALIAS)
# PostGIS-specific stuff is not initialized for non-db connections.
self.assertIs(wrapper.features_class, DatabaseFeatures)
self.assertIs(wrapper.ops_class, DatabaseOperations)
self.assertIs(wrapper.introspection_class, DatabaseIntrospection)
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