diff options
Diffstat (limited to 'Lib/test/test_importlib.py')
-rw-r--r-- | Lib/test/test_importlib.py | 173 |
1 files changed, 1 insertions, 172 deletions
diff --git a/Lib/test/test_importlib.py b/Lib/test/test_importlib.py index 51d8da601a9..6ed05859c93 100644 --- a/Lib/test/test_importlib.py +++ b/Lib/test/test_importlib.py @@ -1,175 +1,4 @@ -import contextlib -import imp -import importlib -import sys -import unittest - - -@contextlib.contextmanager -def uncache(*names): - """Uncache a module from sys.modules. - - A basic sanity check is performed to prevent uncaching modules that either - cannot/shouldn't be uncached. - - """ - for name in names: - if name in ('sys', 'marshal', 'imp'): - raise ValueError( - "cannot uncache {0} as it will break _importlib".format(name)) - try: - del sys.modules[name] - except KeyError: - pass - try: - yield - finally: - for name in names: - try: - del sys.modules[name] - except KeyError: - pass - - -@contextlib.contextmanager -def import_state(**kwargs): - """Context manager to manage the various importers and stored state in the - sys module. - - The 'modules' attribute is not supported as the interpreter state stores a - pointer to the dict that the interpreter uses internally; - reassigning to sys.modules does not have the desired effect. - - """ - originals = {} - try: - for attr, default in (('meta_path', []), ('path', []), - ('path_hooks', []), - ('path_importer_cache', {})): - originals[attr] = getattr(sys, attr) - if attr in kwargs: - new_value = kwargs[attr] - del kwargs[attr] - else: - new_value = default - setattr(sys, attr, new_value) - if len(kwargs): - raise ValueError( - 'unrecognized arguments: {0}'.format(kwargs.keys())) - yield - finally: - for attr, value in originals.items(): - setattr(sys, attr, value) - - -class mock_modules(object): - - """A mock importer/loader.""" - - def __init__(self, *names): - self.modules = {} - for name in names: - if not name.endswith('.__init__'): - import_name = name - else: - import_name = name[:-len('.__init__')] - if '.' not in name: - package = None - elif import_name == name: - package = name.rsplit('.', 1)[0] - else: - package = import_name - module = imp.new_module(import_name) - module.__loader__ = self - module.__file__ = '<mock __file__>' - module.__package__ = package - module.attr = name - if import_name != name: - module.__path__ = ['<mock __path__>'] - self.modules[import_name] = module - - def __getitem__(self, name): - return self.modules[name] - - def find_module(self, fullname, path=None): - if fullname not in self.modules: - return None - else: - return self - - def load_module(self, fullname): - if fullname not in self.modules: - raise ImportError - else: - sys.modules[fullname] = self.modules[fullname] - return self.modules[fullname] - - def __enter__(self): - self._uncache = uncache(*self.modules.keys()) - self._uncache.__enter__() - return self - - def __exit__(self, *exc_info): - self._uncache.__exit__(None, None, None) - - - -class ImportModuleTests(unittest.TestCase): - - """Test importlib.import_module.""" - - def test_module_import(self): - # Test importing a top-level module. - with mock_modules('top_level') as mock: - with import_state(meta_path=[mock]): - module = importlib.import_module('top_level') - self.assertEqual(module.__name__, 'top_level') - - def test_absolute_package_import(self): - # Test importing a module from a package with an absolute name. - pkg_name = 'pkg' - pkg_long_name = '{0}.__init__'.format(pkg_name) - name = '{0}.mod'.format(pkg_name) - with mock_modules(pkg_long_name, name) as mock: - with import_state(meta_path=[mock]): - module = importlib.import_module(name) - self.assertEqual(module.__name__, name) - - def test_shallow_relative_package_import(self): - modules = ['a.__init__', 'a.b.__init__', 'a.b.c.__init__', 'a.b.c.d'] - with mock_modules(*modules) as mock: - with import_state(meta_path=[mock]): - module = importlib.import_module('.d', 'a.b.c') - self.assertEqual(module.__name__, 'a.b.c.d') - - def test_deep_relative_package_import(self): - # Test importing a module from a package through a relatve import. - modules = ['a.__init__', 'a.b.__init__', 'a.c'] - with mock_modules(*modules) as mock: - with import_state(meta_path=[mock]): - module = importlib.import_module('..c', 'a.b') - self.assertEqual(module.__name__, 'a.c') - - def test_absolute_import_with_package(self): - # Test importing a module from a package with an absolute name with - # the 'package' argument given. - pkg_name = 'pkg' - pkg_long_name = '{0}.__init__'.format(pkg_name) - name = '{0}.mod'.format(pkg_name) - with mock_modules(pkg_long_name, name) as mock: - with import_state(meta_path=[mock]): - module = importlib.import_module(name, pkg_name) - self.assertEqual(module.__name__, name) - - def test_relative_import_wo_package(self): - # Relative imports cannot happen without the 'package' argument being - # set. - self.assertRaises(TypeError, importlib.import_module, '.support') - - -def test_main(): - from test.test_support import run_unittest - run_unittest(ImportModuleTests) +from importlib.test.__main__ import test_main if __name__ == '__main__': |