592 lines
21 KiB
Python
592 lines
21 KiB
Python
from test.support import run_unittest, unload, check_warnings, CleanImport
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import unittest
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import sys
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import importlib
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from importlib.util import spec_from_file_location
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import pkgutil
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import os
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import os.path
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import tempfile
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import shutil
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import zipfile
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# Note: pkgutil.walk_packages is currently tested in test_runpy. This is
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# a hack to get a major issue resolved for 3.3b2. Longer term, it should
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# be moved back here, perhaps by factoring out the helper code for
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# creating interesting package layouts to a separate module.
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# Issue #15348 declares this is indeed a dodgy hack ;)
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class PkgutilTests(unittest.TestCase):
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def setUp(self):
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self.dirname = tempfile.mkdtemp()
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self.addCleanup(shutil.rmtree, self.dirname)
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sys.path.insert(0, self.dirname)
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def tearDown(self):
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del sys.path[0]
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def test_getdata_filesys(self):
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pkg = 'test_getdata_filesys'
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# Include a LF and a CRLF, to test that binary data is read back
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RESOURCE_DATA = b'Hello, world!\nSecond line\r\nThird line'
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# Make a package with some resources
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package_dir = os.path.join(self.dirname, pkg)
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os.mkdir(package_dir)
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# Empty init.py
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f = open(os.path.join(package_dir, '__init__.py'), "wb")
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f.close()
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# Resource files, res.txt, sub/res.txt
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f = open(os.path.join(package_dir, 'res.txt'), "wb")
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f.write(RESOURCE_DATA)
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f.close()
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os.mkdir(os.path.join(package_dir, 'sub'))
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f = open(os.path.join(package_dir, 'sub', 'res.txt'), "wb")
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f.write(RESOURCE_DATA)
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f.close()
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# Check we can read the resources
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res1 = pkgutil.get_data(pkg, 'res.txt')
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self.assertEqual(res1, RESOURCE_DATA)
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res2 = pkgutil.get_data(pkg, 'sub/res.txt')
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self.assertEqual(res2, RESOURCE_DATA)
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del sys.modules[pkg]
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def test_getdata_zipfile(self):
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zip = 'test_getdata_zipfile.zip'
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pkg = 'test_getdata_zipfile'
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# Include a LF and a CRLF, to test that binary data is read back
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RESOURCE_DATA = b'Hello, world!\nSecond line\r\nThird line'
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# Make a package with some resources
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zip_file = os.path.join(self.dirname, zip)
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z = zipfile.ZipFile(zip_file, 'w')
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# Empty init.py
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z.writestr(pkg + '/__init__.py', "")
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# Resource files, res.txt, sub/res.txt
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z.writestr(pkg + '/res.txt', RESOURCE_DATA)
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z.writestr(pkg + '/sub/res.txt', RESOURCE_DATA)
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z.close()
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# Check we can read the resources
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sys.path.insert(0, zip_file)
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res1 = pkgutil.get_data(pkg, 'res.txt')
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self.assertEqual(res1, RESOURCE_DATA)
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res2 = pkgutil.get_data(pkg, 'sub/res.txt')
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self.assertEqual(res2, RESOURCE_DATA)
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names = []
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for moduleinfo in pkgutil.iter_modules([zip_file]):
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self.assertIsInstance(moduleinfo, pkgutil.ModuleInfo)
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names.append(moduleinfo.name)
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self.assertEqual(names, ['test_getdata_zipfile'])
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del sys.path[0]
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del sys.modules[pkg]
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def test_unreadable_dir_on_syspath(self):
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# issue7367 - walk_packages failed if unreadable dir on sys.path
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package_name = "unreadable_package"
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d = os.path.join(self.dirname, package_name)
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# this does not appear to create an unreadable dir on Windows
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# but the test should not fail anyway
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os.mkdir(d, 0)
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self.addCleanup(os.rmdir, d)
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for t in pkgutil.walk_packages(path=[self.dirname]):
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self.fail("unexpected package found")
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def test_walkpackages_filesys(self):
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pkg1 = 'test_walkpackages_filesys'
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pkg1_dir = os.path.join(self.dirname, pkg1)
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os.mkdir(pkg1_dir)
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f = open(os.path.join(pkg1_dir, '__init__.py'), "wb")
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f.close()
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os.mkdir(os.path.join(pkg1_dir, 'sub'))
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f = open(os.path.join(pkg1_dir, 'sub', '__init__.py'), "wb")
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f.close()
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f = open(os.path.join(pkg1_dir, 'sub', 'mod.py'), "wb")
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f.close()
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# Now, to juice it up, let's add the opposite packages, too.
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pkg2 = 'sub'
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pkg2_dir = os.path.join(self.dirname, pkg2)
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os.mkdir(pkg2_dir)
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f = open(os.path.join(pkg2_dir, '__init__.py'), "wb")
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f.close()
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os.mkdir(os.path.join(pkg2_dir, 'test_walkpackages_filesys'))
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f = open(os.path.join(pkg2_dir, 'test_walkpackages_filesys', '__init__.py'), "wb")
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f.close()
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f = open(os.path.join(pkg2_dir, 'test_walkpackages_filesys', 'mod.py'), "wb")
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f.close()
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expected = [
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'sub',
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'sub.test_walkpackages_filesys',
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'sub.test_walkpackages_filesys.mod',
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'test_walkpackages_filesys',
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'test_walkpackages_filesys.sub',
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'test_walkpackages_filesys.sub.mod',
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]
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actual= [e[1] for e in pkgutil.walk_packages([self.dirname])]
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self.assertEqual(actual, expected)
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for pkg in expected:
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if pkg.endswith('mod'):
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continue
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del sys.modules[pkg]
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def test_walkpackages_zipfile(self):
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"""Tests the same as test_walkpackages_filesys, only with a zip file."""
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zip = 'test_walkpackages_zipfile.zip'
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pkg1 = 'test_walkpackages_zipfile'
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pkg2 = 'sub'
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zip_file = os.path.join(self.dirname, zip)
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z = zipfile.ZipFile(zip_file, 'w')
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z.writestr(pkg2 + '/__init__.py', "")
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z.writestr(pkg2 + '/' + pkg1 + '/__init__.py', "")
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z.writestr(pkg2 + '/' + pkg1 + '/mod.py', "")
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z.writestr(pkg1 + '/__init__.py', "")
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z.writestr(pkg1 + '/' + pkg2 + '/__init__.py', "")
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z.writestr(pkg1 + '/' + pkg2 + '/mod.py', "")
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z.close()
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sys.path.insert(0, zip_file)
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expected = [
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'sub',
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'sub.test_walkpackages_zipfile',
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'sub.test_walkpackages_zipfile.mod',
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'test_walkpackages_zipfile',
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'test_walkpackages_zipfile.sub',
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'test_walkpackages_zipfile.sub.mod',
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]
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actual= [e[1] for e in pkgutil.walk_packages([zip_file])]
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self.assertEqual(actual, expected)
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del sys.path[0]
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for pkg in expected:
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if pkg.endswith('mod'):
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continue
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del sys.modules[pkg]
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def test_walk_packages_raises_on_string_or_bytes_input(self):
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str_input = 'test_dir'
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with self.assertRaises((TypeError, ValueError)):
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list(pkgutil.walk_packages(str_input))
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bytes_input = b'test_dir'
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with self.assertRaises((TypeError, ValueError)):
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list(pkgutil.walk_packages(bytes_input))
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def test_name_resolution(self):
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import logging
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import logging.handlers
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success_cases = (
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('os', os),
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('os.path', os.path),
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('os.path:pathsep', os.path.pathsep),
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('logging', logging),
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('logging:', logging),
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('logging.handlers', logging.handlers),
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('logging.handlers:', logging.handlers),
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('logging.handlers:SysLogHandler', logging.handlers.SysLogHandler),
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('logging.handlers.SysLogHandler', logging.handlers.SysLogHandler),
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('logging.handlers:SysLogHandler.LOG_ALERT',
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logging.handlers.SysLogHandler.LOG_ALERT),
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('logging.handlers.SysLogHandler.LOG_ALERT',
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logging.handlers.SysLogHandler.LOG_ALERT),
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('builtins.int', int),
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('builtins:int', int),
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('builtins.int.from_bytes', int.from_bytes),
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('builtins:int.from_bytes', int.from_bytes),
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('builtins.ZeroDivisionError', ZeroDivisionError),
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('builtins:ZeroDivisionError', ZeroDivisionError),
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('os:path', os.path),
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)
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failure_cases = (
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(None, TypeError),
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(1, TypeError),
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(2.0, TypeError),
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(True, TypeError),
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('', ValueError),
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('?abc', ValueError),
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('abc/foo', ValueError),
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('foo', ImportError),
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('os.foo', AttributeError),
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('os.foo:', ImportError),
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('os.pth:pathsep', ImportError),
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('logging.handlers:NoSuchHandler', AttributeError),
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('logging.handlers:SysLogHandler.NO_SUCH_VALUE', AttributeError),
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('logging.handlers.SysLogHandler.NO_SUCH_VALUE', AttributeError),
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('ZeroDivisionError', ImportError),
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('os.path.9abc', ValueError),
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('9abc', ValueError),
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)
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# add some Unicode package names to the mix.
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unicode_words = ('\u0935\u092e\u0938',
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'\xe9', '\xc8',
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'\uc548\ub155\ud558\uc138\uc694',
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'\u3055\u3088\u306a\u3089',
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'\u3042\u308a\u304c\u3068\u3046',
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'\u0425\u043e\u0440\u043e\u0448\u043e',
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'\u0441\u043f\u0430\u0441\u0438\u0431\u043e',
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'\u73b0\u4ee3\u6c49\u8bed\u5e38\u7528\u5b57\u8868')
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for uw in unicode_words:
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d = os.path.join(self.dirname, uw)
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try:
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os.makedirs(d, exist_ok=True)
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except UnicodeEncodeError:
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# When filesystem encoding cannot encode uw: skip this test
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continue
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# make an empty __init__.py file
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f = os.path.join(d, '__init__.py')
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with open(f, 'w') as f:
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f.write('')
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f.flush()
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# now import the package we just created; clearing the caches is
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# needed, otherwise the newly created package isn't found
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importlib.invalidate_caches()
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mod = importlib.import_module(uw)
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success_cases += (uw, mod),
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if len(uw) > 1:
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failure_cases += (uw[:-1], ImportError),
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# add an example with a Unicode digit at the start
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failure_cases += ('\u0966\u0935\u092e\u0938', ValueError),
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for s, expected in success_cases:
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with self.subTest(s=s):
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o = pkgutil.resolve_name(s)
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self.assertEqual(o, expected)
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for s, exc in failure_cases:
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with self.subTest(s=s):
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with self.assertRaises(exc):
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pkgutil.resolve_name(s)
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class PkgutilPEP302Tests(unittest.TestCase):
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class MyTestLoader(object):
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def create_module(self, spec):
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return None
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def exec_module(self, mod):
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# Count how many times the module is reloaded
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mod.__dict__['loads'] = mod.__dict__.get('loads', 0) + 1
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def get_data(self, path):
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return "Hello, world!"
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class MyTestImporter(object):
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def find_spec(self, fullname, path=None, target=None):
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loader = PkgutilPEP302Tests.MyTestLoader()
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return spec_from_file_location(fullname,
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'<%s>' % loader.__class__.__name__,
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loader=loader,
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submodule_search_locations=[])
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def setUp(self):
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sys.meta_path.insert(0, self.MyTestImporter())
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def tearDown(self):
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del sys.meta_path[0]
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def test_getdata_pep302(self):
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# Use a dummy finder/loader
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self.assertEqual(pkgutil.get_data('foo', 'dummy'), "Hello, world!")
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del sys.modules['foo']
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def test_alreadyloaded(self):
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# Ensure that get_data works without reloading - the "loads" module
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# variable in the example loader should count how many times a reload
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# occurs.
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import foo
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self.assertEqual(foo.loads, 1)
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self.assertEqual(pkgutil.get_data('foo', 'dummy'), "Hello, world!")
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self.assertEqual(foo.loads, 1)
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del sys.modules['foo']
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# These tests, especially the setup and cleanup, are hideous. They
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# need to be cleaned up once issue 14715 is addressed.
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class ExtendPathTests(unittest.TestCase):
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def create_init(self, pkgname):
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dirname = tempfile.mkdtemp()
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sys.path.insert(0, dirname)
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pkgdir = os.path.join(dirname, pkgname)
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os.mkdir(pkgdir)
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with open(os.path.join(pkgdir, '__init__.py'), 'w') as fl:
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fl.write('from pkgutil import extend_path\n__path__ = extend_path(__path__, __name__)\n')
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return dirname
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def create_submodule(self, dirname, pkgname, submodule_name, value):
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module_name = os.path.join(dirname, pkgname, submodule_name + '.py')
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with open(module_name, 'w') as fl:
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print('value={}'.format(value), file=fl)
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def test_simple(self):
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pkgname = 'foo'
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dirname_0 = self.create_init(pkgname)
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dirname_1 = self.create_init(pkgname)
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self.create_submodule(dirname_0, pkgname, 'bar', 0)
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self.create_submodule(dirname_1, pkgname, 'baz', 1)
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import foo.bar
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import foo.baz
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# Ensure we read the expected values
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self.assertEqual(foo.bar.value, 0)
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self.assertEqual(foo.baz.value, 1)
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# Ensure the path is set up correctly
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self.assertEqual(sorted(foo.__path__),
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sorted([os.path.join(dirname_0, pkgname),
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os.path.join(dirname_1, pkgname)]))
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# Cleanup
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shutil.rmtree(dirname_0)
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shutil.rmtree(dirname_1)
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del sys.path[0]
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del sys.path[0]
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del sys.modules['foo']
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del sys.modules['foo.bar']
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del sys.modules['foo.baz']
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# Another awful testing hack to be cleaned up once the test_runpy
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# helpers are factored out to a common location
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def test_iter_importers(self):
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iter_importers = pkgutil.iter_importers
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get_importer = pkgutil.get_importer
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pkgname = 'spam'
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modname = 'eggs'
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dirname = self.create_init(pkgname)
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pathitem = os.path.join(dirname, pkgname)
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fullname = '{}.{}'.format(pkgname, modname)
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sys.modules.pop(fullname, None)
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sys.modules.pop(pkgname, None)
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try:
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self.create_submodule(dirname, pkgname, modname, 0)
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importlib.import_module(fullname)
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importers = list(iter_importers(fullname))
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expected_importer = get_importer(pathitem)
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for finder in importers:
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spec = pkgutil._get_spec(finder, fullname)
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loader = spec.loader
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try:
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loader = loader.loader
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except AttributeError:
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# For now we still allow raw loaders from
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# find_module().
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pass
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self.assertIsInstance(finder, importlib.machinery.FileFinder)
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self.assertEqual(finder, expected_importer)
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self.assertIsInstance(loader,
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importlib.machinery.SourceFileLoader)
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self.assertIsNone(pkgutil._get_spec(finder, pkgname))
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with self.assertRaises(ImportError):
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list(iter_importers('invalid.module'))
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with self.assertRaises(ImportError):
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list(iter_importers('.spam'))
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finally:
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shutil.rmtree(dirname)
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del sys.path[0]
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try:
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del sys.modules['spam']
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del sys.modules['spam.eggs']
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except KeyError:
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pass
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def test_mixed_namespace(self):
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pkgname = 'foo'
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dirname_0 = self.create_init(pkgname)
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dirname_1 = self.create_init(pkgname)
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self.create_submodule(dirname_0, pkgname, 'bar', 0)
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# Turn this into a PEP 420 namespace package
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os.unlink(os.path.join(dirname_0, pkgname, '__init__.py'))
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self.create_submodule(dirname_1, pkgname, 'baz', 1)
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import foo.bar
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import foo.baz
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# Ensure we read the expected values
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self.assertEqual(foo.bar.value, 0)
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self.assertEqual(foo.baz.value, 1)
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# Ensure the path is set up correctly
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self.assertEqual(sorted(foo.__path__),
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sorted([os.path.join(dirname_0, pkgname),
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os.path.join(dirname_1, pkgname)]))
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# Cleanup
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shutil.rmtree(dirname_0)
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shutil.rmtree(dirname_1)
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del sys.path[0]
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del sys.path[0]
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del sys.modules['foo']
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del sys.modules['foo.bar']
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del sys.modules['foo.baz']
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# XXX: test .pkg files
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class NestedNamespacePackageTest(unittest.TestCase):
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def setUp(self):
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self.basedir = tempfile.mkdtemp()
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self.old_path = sys.path[:]
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def tearDown(self):
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sys.path[:] = self.old_path
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shutil.rmtree(self.basedir)
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def create_module(self, name, contents):
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base, final = name.rsplit('.', 1)
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base_path = os.path.join(self.basedir, base.replace('.', os.path.sep))
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os.makedirs(base_path, exist_ok=True)
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with open(os.path.join(base_path, final + ".py"), 'w') as f:
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f.write(contents)
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def test_nested(self):
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pkgutil_boilerplate = (
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'import pkgutil; '
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'__path__ = pkgutil.extend_path(__path__, __name__)')
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self.create_module('a.pkg.__init__', pkgutil_boilerplate)
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self.create_module('b.pkg.__init__', pkgutil_boilerplate)
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self.create_module('a.pkg.subpkg.__init__', pkgutil_boilerplate)
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self.create_module('b.pkg.subpkg.__init__', pkgutil_boilerplate)
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self.create_module('a.pkg.subpkg.c', 'c = 1')
|
|
self.create_module('b.pkg.subpkg.d', 'd = 2')
|
|
sys.path.insert(0, os.path.join(self.basedir, 'a'))
|
|
sys.path.insert(0, os.path.join(self.basedir, 'b'))
|
|
import pkg
|
|
self.addCleanup(unload, 'pkg')
|
|
self.assertEqual(len(pkg.__path__), 2)
|
|
import pkg.subpkg
|
|
self.addCleanup(unload, 'pkg.subpkg')
|
|
self.assertEqual(len(pkg.subpkg.__path__), 2)
|
|
from pkg.subpkg.c import c
|
|
from pkg.subpkg.d import d
|
|
self.assertEqual(c, 1)
|
|
self.assertEqual(d, 2)
|
|
|
|
|
|
class ImportlibMigrationTests(unittest.TestCase):
|
|
# With full PEP 302 support in the standard import machinery, the
|
|
# PEP 302 emulation in this module is in the process of being
|
|
# deprecated in favour of importlib proper
|
|
|
|
def check_deprecated(self):
|
|
return check_warnings(
|
|
("This emulation is deprecated, use 'importlib' instead",
|
|
DeprecationWarning))
|
|
|
|
def test_importer_deprecated(self):
|
|
with self.check_deprecated():
|
|
pkgutil.ImpImporter("")
|
|
|
|
def test_loader_deprecated(self):
|
|
with self.check_deprecated():
|
|
pkgutil.ImpLoader("", "", "", "")
|
|
|
|
def test_get_loader_avoids_emulation(self):
|
|
with check_warnings() as w:
|
|
self.assertIsNotNone(pkgutil.get_loader("sys"))
|
|
self.assertIsNotNone(pkgutil.get_loader("os"))
|
|
self.assertIsNotNone(pkgutil.get_loader("test.support"))
|
|
self.assertEqual(len(w.warnings), 0)
|
|
|
|
@unittest.skipIf(__name__ == '__main__', 'not compatible with __main__')
|
|
def test_get_loader_handles_missing_loader_attribute(self):
|
|
global __loader__
|
|
this_loader = __loader__
|
|
del __loader__
|
|
try:
|
|
with check_warnings() as w:
|
|
self.assertIsNotNone(pkgutil.get_loader(__name__))
|
|
self.assertEqual(len(w.warnings), 0)
|
|
finally:
|
|
__loader__ = this_loader
|
|
|
|
def test_get_loader_handles_missing_spec_attribute(self):
|
|
name = 'spam'
|
|
mod = type(sys)(name)
|
|
del mod.__spec__
|
|
with CleanImport(name):
|
|
sys.modules[name] = mod
|
|
loader = pkgutil.get_loader(name)
|
|
self.assertIsNone(loader)
|
|
|
|
def test_get_loader_handles_spec_attribute_none(self):
|
|
name = 'spam'
|
|
mod = type(sys)(name)
|
|
mod.__spec__ = None
|
|
with CleanImport(name):
|
|
sys.modules[name] = mod
|
|
loader = pkgutil.get_loader(name)
|
|
self.assertIsNone(loader)
|
|
|
|
def test_get_loader_None_in_sys_modules(self):
|
|
name = 'totally bogus'
|
|
sys.modules[name] = None
|
|
try:
|
|
loader = pkgutil.get_loader(name)
|
|
finally:
|
|
del sys.modules[name]
|
|
self.assertIsNone(loader)
|
|
|
|
def test_find_loader_missing_module(self):
|
|
name = 'totally bogus'
|
|
loader = pkgutil.find_loader(name)
|
|
self.assertIsNone(loader)
|
|
|
|
def test_find_loader_avoids_emulation(self):
|
|
with check_warnings() as w:
|
|
self.assertIsNotNone(pkgutil.find_loader("sys"))
|
|
self.assertIsNotNone(pkgutil.find_loader("os"))
|
|
self.assertIsNotNone(pkgutil.find_loader("test.support"))
|
|
self.assertEqual(len(w.warnings), 0)
|
|
|
|
def test_get_importer_avoids_emulation(self):
|
|
# We use an illegal path so *none* of the path hooks should fire
|
|
with check_warnings() as w:
|
|
self.assertIsNone(pkgutil.get_importer("*??"))
|
|
self.assertEqual(len(w.warnings), 0)
|
|
|
|
def test_iter_importers_avoids_emulation(self):
|
|
with check_warnings() as w:
|
|
for importer in pkgutil.iter_importers(): pass
|
|
self.assertEqual(len(w.warnings), 0)
|
|
|
|
|
|
def test_main():
|
|
run_unittest(PkgutilTests, PkgutilPEP302Tests, ExtendPathTests,
|
|
NestedNamespacePackageTest, ImportlibMigrationTests)
|
|
# this is necessary if test is run repeated (like when finding leaks)
|
|
import zipimport
|
|
import importlib
|
|
zipimport._zip_directory_cache.clear()
|
|
importlib.invalidate_caches()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|