113 lines
4.0 KiB
Python
113 lines
4.0 KiB
Python
import unittest
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from django.core.exceptions import ImproperlyConfigured
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from django.db import ProgrammingError
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try:
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from django.contrib.gis.db.backends.postgis.operations import PostGISOperations
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HAS_POSTGRES = True
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except ImportError:
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HAS_POSTGRES = False
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except ImproperlyConfigured as e:
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# If psycopg is installed but not geos, the import path hits
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# django.contrib.gis.geometry.backend which will "helpfully" convert
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# an ImportError into an ImproperlyConfigured.
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# Here, we make sure we're only catching this specific case and not another
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# ImproperlyConfigured one.
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if e.args and e.args[0].startswith('Could not import user-defined GEOMETRY_BACKEND'):
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HAS_POSTGRES = False
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else:
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raise
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if HAS_POSTGRES:
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class FakeConnection:
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def __init__(self):
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self.settings_dict = {
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'NAME': 'test',
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}
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class FakePostGISOperations(PostGISOperations):
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def __init__(self, version=None):
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self.version = version
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self.connection = FakeConnection()
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def _get_postgis_func(self, func):
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if func == 'postgis_lib_version':
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if self.version is None:
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raise ProgrammingError
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else:
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return self.version
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elif func == 'version':
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pass
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else:
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raise NotImplementedError('This function was not expected to be called')
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@unittest.skipUnless(HAS_POSTGRES, "The psycopg2 driver is needed for these tests")
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class TestPostGISVersionCheck(unittest.TestCase):
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"""
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The PostGIS version check parses correctly the version numbers
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"""
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def test_get_version(self):
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expect = '1.0.0'
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ops = FakePostGISOperations(expect)
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actual = ops.postgis_lib_version()
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self.assertEqual(expect, actual)
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def test_version_classic_tuple(self):
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expect = ('1.2.3', 1, 2, 3)
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ops = FakePostGISOperations(expect[0])
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actual = ops.postgis_version_tuple()
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self.assertEqual(expect, actual)
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def test_version_dev_tuple(self):
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expect = ('1.2.3dev', 1, 2, 3)
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ops = FakePostGISOperations(expect[0])
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actual = ops.postgis_version_tuple()
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self.assertEqual(expect, actual)
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def test_valid_version_numbers(self):
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versions = [
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('1.3.0', 1, 3, 0),
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('2.1.1', 2, 1, 1),
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('2.2.0dev', 2, 2, 0),
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]
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for version in versions:
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ops = FakePostGISOperations(version[0])
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actual = ops.spatial_version
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self.assertEqual(version[1:], actual)
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def test_invalid_version_numbers(self):
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versions = ['nope', '123']
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for version in versions:
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ops = FakePostGISOperations(version)
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with self.assertRaises(Exception):
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ops.spatial_version
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def test_no_version_number(self):
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ops = FakePostGISOperations()
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with self.assertRaises(ImproperlyConfigured):
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ops.spatial_version
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def test_version_dependent_funcs(self):
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"""
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Resolve names of functions renamed and deprecated in PostGIS 2.2.0
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depending on PostGIS version.
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Remove when dropping support for PostGIS 2.1.
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"""
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ops = FakePostGISOperations('2.2.0')
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self.assertEqual(ops.spatial_function_name('DistanceSphere'), 'ST_DistanceSphere')
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self.assertEqual(ops.spatial_function_name('DistanceSpheroid'), 'ST_DistanceSpheroid')
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self.assertEqual(ops.spatial_function_name('LengthSpheroid'), 'ST_LengthSpheroid')
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self.assertEqual(ops.spatial_function_name('MemSize'), 'ST_MemSize')
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ops = FakePostGISOperations('2.1.0')
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self.assertEqual(ops.spatial_function_name('DistanceSphere'), 'ST_distance_sphere')
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self.assertEqual(ops.spatial_function_name('DistanceSpheroid'), 'ST_distance_spheroid')
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self.assertEqual(ops.spatial_function_name('LengthSpheroid'), 'ST_length_spheroid')
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self.assertEqual(ops.spatial_function_name('MemSize'), 'ST_mem_size')
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