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git-svn-id: http://code.djangoproject.com/svn/django/trunk@13095 bcc190cf-cafb-0310-a4f2-bffc1f526a37
115 lines
4.4 KiB
Python
115 lines
4.4 KiB
Python
import os
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import sys
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from unittest import TestCase
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from zipimport import zipimporter
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from django.utils.importlib import import_module
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from django.utils.module_loading import module_has_submodule
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class DefaultLoader(TestCase):
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def test_loader(self):
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"Normal module existence can be tested"
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test_module = import_module('regressiontests.utils.test_module')
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# An importable child
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self.assertTrue(module_has_submodule(test_module, 'good_module'))
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mod = import_module('regressiontests.utils.test_module.good_module')
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self.assertEqual(mod.content, 'Good Module')
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# A child that exists, but will generate an import error if loaded
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self.assertTrue(module_has_submodule(test_module, 'bad_module'))
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self.assertRaises(ImportError, import_module, 'regressiontests.utils.test_module.bad_module')
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# A child that doesn't exist
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self.assertFalse(module_has_submodule(test_module, 'no_such_module'))
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self.assertRaises(ImportError, import_module, 'regressiontests.utils.test_module.no_such_module')
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class EggLoader(TestCase):
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def setUp(self):
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self.old_path = sys.path
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self.egg_dir = '%s/eggs' % os.path.dirname(__file__)
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def tearDown(self):
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sys.path = self.old_path
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sys.path_importer_cache.clear()
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sys.modules.pop('egg_module.sub1.sub2.bad_module', None)
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sys.modules.pop('egg_module.sub1.sub2.good_module', None)
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sys.modules.pop('egg_module.sub1.sub2', None)
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sys.modules.pop('egg_module.sub1', None)
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sys.modules.pop('egg_module.bad_module', None)
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sys.modules.pop('egg_module.good_module', None)
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sys.modules.pop('egg_module', None)
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def test_shallow_loader(self):
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"Module existence can be tested inside eggs"
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egg_name = '%s/test_egg.egg' % self.egg_dir
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sys.path.append(egg_name)
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egg_module = import_module('egg_module')
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# An importable child
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self.assertTrue(module_has_submodule(egg_module, 'good_module'))
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mod = import_module('egg_module.good_module')
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self.assertEqual(mod.content, 'Good Module')
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# A child that exists, but will generate an import error if loaded
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self.assertTrue(module_has_submodule(egg_module, 'bad_module'))
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self.assertRaises(ImportError, import_module, 'egg_module.bad_module')
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# A child that doesn't exist
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self.assertFalse(module_has_submodule(egg_module, 'no_such_module'))
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self.assertRaises(ImportError, import_module, 'egg_module.no_such_module')
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def test_deep_loader(self):
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"Modules deep inside an egg can still be tested for existence"
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egg_name = '%s/test_egg.egg' % self.egg_dir
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sys.path.append(egg_name)
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egg_module = import_module('egg_module.sub1.sub2')
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# An importable child
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self.assertTrue(module_has_submodule(egg_module, 'good_module'))
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mod = import_module('egg_module.sub1.sub2.good_module')
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self.assertEqual(mod.content, 'Deep Good Module')
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# A child that exists, but will generate an import error if loaded
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self.assertTrue(module_has_submodule(egg_module, 'bad_module'))
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self.assertRaises(ImportError, import_module, 'egg_module.sub1.sub2.bad_module')
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# A child that doesn't exist
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self.assertFalse(module_has_submodule(egg_module, 'no_such_module'))
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self.assertRaises(ImportError, import_module, 'egg_module.sub1.sub2.no_such_module')
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class TestFinder(object):
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def __init__(self, *args, **kwargs):
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self.importer = zipimporter(*args, **kwargs)
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def find_module(self, path):
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importer = self.importer.find_module(path)
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if importer is None:
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return
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return TestLoader(importer)
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class TestLoader(object):
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def __init__(self, importer):
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self.importer = importer
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def load_module(self, name):
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mod = self.importer.load_module(name)
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mod.__loader__ = self
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return mod
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class CustomLoader(EggLoader):
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"""The Custom Loader test is exactly the same as the EggLoader, but
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it uses a custom defined Loader and Finder that is intentionally
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split into two classes. Although the EggLoader combines both functions
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into one class, this isn't required.
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"""
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def setUp(self):
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super(CustomLoader, self).setUp()
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sys.path_hooks.insert(0, TestFinder)
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sys.path_importer_cache.clear()
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def tearDown(self):
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super(CustomLoader, self).tearDown()
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sys.path_hooks.pop(0)
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