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98 lines
3.4 KiB
Python
98 lines
3.4 KiB
Python
import copy
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import unittest
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from functools import wraps
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from unittest import mock
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from django.conf import settings
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from django.db import DEFAULT_DB_ALIAS, connection
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from django.db.models.expressions import Func
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def skipUnlessGISLookup(*gis_lookups):
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"""
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Skip a test unless a database supports all of gis_lookups.
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"""
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def decorator(test_func):
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@wraps(test_func)
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def skip_wrapper(*args, **kwargs):
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if any(key not in connection.ops.gis_operators for key in gis_lookups):
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raise unittest.SkipTest(
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"Database doesn't support all the lookups: %s" % ", ".join(gis_lookups)
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)
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return test_func(*args, **kwargs)
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return skip_wrapper
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return decorator
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def no_backend(test_func, backend):
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"Use this decorator to disable test on specified backend."
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if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'].rsplit('.')[-1] == backend:
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@unittest.skip("This test is skipped on '%s' backend" % backend)
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def inner():
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pass
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return inner
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else:
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return test_func
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# Decorators to disable entire test functions for specific
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# spatial backends.
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def no_oracle(func):
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return no_backend(func, 'oracle')
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# Shortcut booleans to omit only portions of tests.
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_default_db = settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'].rsplit('.')[-1]
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oracle = _default_db == 'oracle'
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postgis = _default_db == 'postgis'
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mysql = _default_db == 'mysql'
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spatialite = _default_db == 'spatialite'
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# MySQL spatial indices can't handle NULL geometries.
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gisfield_may_be_null = not mysql
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if oracle and 'gis' in settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE']:
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from django.contrib.gis.db.backends.oracle.models import OracleSpatialRefSys as SpatialRefSys
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elif postgis:
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from django.contrib.gis.db.backends.postgis.models import PostGISSpatialRefSys as SpatialRefSys
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elif spatialite:
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from django.contrib.gis.db.backends.spatialite.models import SpatialiteSpatialRefSys as SpatialRefSys
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else:
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SpatialRefSys = None
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class FuncTestMixin:
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"""Assert that Func expressions aren't mutated during their as_sql()."""
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def setUp(self):
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def as_sql_wrapper(original_as_sql):
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def inner(*args, **kwargs):
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func = original_as_sql.__self__
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# Resolve output_field before as_sql() so touching it in
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# as_sql() won't change __dict__.
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func.output_field
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__dict__original = copy.deepcopy(func.__dict__)
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result = original_as_sql(*args, **kwargs)
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msg = '%s Func was mutated during compilation.' % func.__class__.__name__
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self.assertEqual(func.__dict__, __dict__original, msg)
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return result
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return inner
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def __getattribute__(self, name):
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if name != vendor_impl:
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return __getattribute__original(self, name)
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try:
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as_sql = __getattribute__original(self, vendor_impl)
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except AttributeError:
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as_sql = __getattribute__original(self, 'as_sql')
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return as_sql_wrapper(as_sql)
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vendor_impl = 'as_' + connection.vendor
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__getattribute__original = Func.__getattribute__
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self.func_patcher = mock.patch.object(Func, '__getattribute__', __getattribute__)
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self.func_patcher.start()
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super().setUp()
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def tearDown(self):
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super().tearDown()
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self.func_patcher.stop()
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