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svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r76240 | antoine.pitrou | 2009-11-13 17:29:04 +0100 (ven., 13 nov. 2009) | 6 lines Issue #6551: test_zipimport could import and then destroy some modules of the encodings package, which would make other tests fail further down the road because the internally cached encoders and decoders would point to empty global variables. ........
253 lines
7.9 KiB
Python
253 lines
7.9 KiB
Python
import sys
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import imp
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import os
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import unittest
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from test import support
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test_src = """\
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def get_name():
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return __name__
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def get_file():
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return __file__
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"""
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absimp = "import sub\n"
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relimp = "from . import sub\n"
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deeprelimp = "from .... import sub\n"
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futimp = "from __future__ import absolute_import\n"
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reload_src = test_src+"""\
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reloaded = True
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"""
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test_co = compile(test_src, "<???>", "exec")
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reload_co = compile(reload_src, "<???>", "exec")
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test2_oldabs_co = compile(absimp + test_src, "<???>", "exec")
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test2_newabs_co = compile(futimp + absimp + test_src, "<???>", "exec")
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test2_newrel_co = compile(relimp + test_src, "<???>", "exec")
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test2_deeprel_co = compile(deeprelimp + test_src, "<???>", "exec")
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test2_futrel_co = compile(futimp + relimp + test_src, "<???>", "exec")
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test_path = "!!!_test_!!!"
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class TestImporter:
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modules = {
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"hooktestmodule": (False, test_co),
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"hooktestpackage": (True, test_co),
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"hooktestpackage.sub": (True, test_co),
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"hooktestpackage.sub.subber": (True, test_co),
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"hooktestpackage.oldabs": (False, test2_oldabs_co),
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"hooktestpackage.newabs": (False, test2_newabs_co),
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"hooktestpackage.newrel": (False, test2_newrel_co),
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"hooktestpackage.sub.subber.subest": (True, test2_deeprel_co),
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"hooktestpackage.futrel": (False, test2_futrel_co),
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"sub": (False, test_co),
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"reloadmodule": (False, test_co),
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}
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def __init__(self, path=test_path):
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if path != test_path:
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# if out class is on sys.path_hooks, we must raise
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# ImportError for any path item that we can't handle.
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raise ImportError
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self.path = path
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def _get__path__(self):
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raise NotImplementedError
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def find_module(self, fullname, path=None):
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if fullname in self.modules:
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return self
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else:
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return None
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def load_module(self, fullname):
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ispkg, code = self.modules[fullname]
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mod = sys.modules.setdefault(fullname,imp.new_module(fullname))
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mod.__file__ = "<%s>" % self.__class__.__name__
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mod.__loader__ = self
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if ispkg:
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mod.__path__ = self._get__path__()
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exec(code, mod.__dict__)
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return mod
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class MetaImporter(TestImporter):
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def _get__path__(self):
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return []
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class PathImporter(TestImporter):
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def _get__path__(self):
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return [self.path]
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class ImportBlocker:
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"""Place an ImportBlocker instance on sys.meta_path and you
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can be sure the modules you specified can't be imported, even
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if it's a builtin."""
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def __init__(self, *namestoblock):
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self.namestoblock = dict.fromkeys(namestoblock)
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def find_module(self, fullname, path=None):
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if fullname in self.namestoblock:
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return self
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return None
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def load_module(self, fullname):
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raise ImportError("I dare you")
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class ImpWrapper:
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def __init__(self, path=None):
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if path is not None and not os.path.isdir(path):
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raise ImportError
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self.path = path
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def find_module(self, fullname, path=None):
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subname = fullname.split(".")[-1]
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if subname != fullname and self.path is None:
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return None
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if self.path is None:
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path = None
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else:
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path = [self.path]
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try:
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file, filename, stuff = imp.find_module(subname, path)
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except ImportError:
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return None
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return ImpLoader(file, filename, stuff)
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class ImpLoader:
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def __init__(self, file, filename, stuff):
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self.file = file
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self.filename = filename
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self.stuff = stuff
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def load_module(self, fullname):
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mod = imp.load_module(fullname, self.file, self.filename, self.stuff)
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if self.file:
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self.file.close()
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mod.__loader__ = self # for introspection
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return mod
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class ImportHooksBaseTestCase(unittest.TestCase):
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def setUp(self):
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self.path = sys.path[:]
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self.meta_path = sys.meta_path[:]
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self.path_hooks = sys.path_hooks[:]
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sys.path_importer_cache.clear()
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self.modules_before = support.modules_setup()
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def tearDown(self):
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sys.path[:] = self.path
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sys.meta_path[:] = self.meta_path
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sys.path_hooks[:] = self.path_hooks
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sys.path_importer_cache.clear()
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support.modules_cleanup(*self.modules_before)
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class ImportHooksTestCase(ImportHooksBaseTestCase):
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def doTestImports(self, importer=None):
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import hooktestmodule
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import hooktestpackage
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import hooktestpackage.sub
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import hooktestpackage.sub.subber
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self.assertEqual(hooktestmodule.get_name(),
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"hooktestmodule")
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self.assertEqual(hooktestpackage.get_name(),
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"hooktestpackage")
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self.assertEqual(hooktestpackage.sub.get_name(),
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"hooktestpackage.sub")
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self.assertEqual(hooktestpackage.sub.subber.get_name(),
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"hooktestpackage.sub.subber")
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if importer:
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self.assertEqual(hooktestmodule.__loader__, importer)
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self.assertEqual(hooktestpackage.__loader__, importer)
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self.assertEqual(hooktestpackage.sub.__loader__, importer)
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self.assertEqual(hooktestpackage.sub.subber.__loader__, importer)
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TestImporter.modules['reloadmodule'] = (False, test_co)
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import reloadmodule
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self.assertFalse(hasattr(reloadmodule,'reloaded'))
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import hooktestpackage.newrel
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self.assertEqual(hooktestpackage.newrel.get_name(),
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"hooktestpackage.newrel")
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self.assertEqual(hooktestpackage.newrel.sub,
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hooktestpackage.sub)
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import hooktestpackage.sub.subber.subest as subest
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self.assertEqual(subest.get_name(),
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"hooktestpackage.sub.subber.subest")
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self.assertEqual(subest.sub,
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hooktestpackage.sub)
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import hooktestpackage.futrel
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self.assertEqual(hooktestpackage.futrel.get_name(),
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"hooktestpackage.futrel")
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self.assertEqual(hooktestpackage.futrel.sub,
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hooktestpackage.sub)
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import sub
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self.assertEqual(sub.get_name(), "sub")
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import hooktestpackage.oldabs
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self.assertEqual(hooktestpackage.oldabs.get_name(),
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"hooktestpackage.oldabs")
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self.assertEqual(hooktestpackage.oldabs.sub, sub)
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import hooktestpackage.newabs
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self.assertEqual(hooktestpackage.newabs.get_name(),
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"hooktestpackage.newabs")
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self.assertEqual(hooktestpackage.newabs.sub, sub)
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def testMetaPath(self):
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i = MetaImporter()
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sys.meta_path.append(i)
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self.doTestImports(i)
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def testPathHook(self):
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sys.path_hooks.append(PathImporter)
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sys.path.append(test_path)
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self.doTestImports()
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def testBlocker(self):
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mname = "exceptions" # an arbitrary harmless builtin module
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if mname in sys.modules:
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del sys.modules[mname]
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sys.meta_path.append(ImportBlocker(mname))
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try:
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__import__(mname)
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except ImportError:
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pass
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else:
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self.fail("'%s' was not supposed to be importable" % mname)
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def testImpWrapper(self):
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i = ImpWrapper()
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sys.meta_path.append(i)
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sys.path_hooks.append(ImpWrapper)
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mnames = ("colorsys", "urllib.parse", "distutils.core")
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for mname in mnames:
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parent = mname.split(".")[0]
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for n in list(sys.modules):
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if n.startswith(parent):
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del sys.modules[n]
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for mname in mnames:
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m = __import__(mname, globals(), locals(), ["__dummy__"])
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m.__loader__ # to make sure we actually handled the import
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def test_main():
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support.run_unittest(ImportHooksTestCase)
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if __name__ == "__main__":
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test_main()
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