mirror of https://github.com/python/cpython
1369 lines
51 KiB
Python
1369 lines
51 KiB
Python
import builtins
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import contextlib
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import errno
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import glob
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import importlib.util
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from importlib._bootstrap_external import _get_sourcefile
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import marshal
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import os
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import py_compile
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import random
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import shutil
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import stat
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import subprocess
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import sys
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import textwrap
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import threading
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import time
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import unittest
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from unittest import mock
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import test.support
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from test.support import (
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TESTFN, forget, is_jython,
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make_legacy_pyc, rmtree, swap_attr, swap_item, temp_umask,
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unlink, unload, cpython_only, TESTFN_UNENCODABLE,
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temp_dir, DirsOnSysPath)
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from test.support import script_helper
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from test.support import threading_helper
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from test.test_importlib.util import uncache
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from types import ModuleType
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skip_if_dont_write_bytecode = unittest.skipIf(
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sys.dont_write_bytecode,
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"test meaningful only when writing bytecode")
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def remove_files(name):
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for f in (name + ".py",
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name + ".pyc",
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name + ".pyw",
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name + "$py.class"):
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unlink(f)
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rmtree('__pycache__')
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@contextlib.contextmanager
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def _ready_to_import(name=None, source=""):
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# sets up a temporary directory and removes it
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# creates the module file
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# temporarily clears the module from sys.modules (if any)
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# reverts or removes the module when cleaning up
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name = name or "spam"
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with temp_dir() as tempdir:
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path = script_helper.make_script(tempdir, name, source)
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old_module = sys.modules.pop(name, None)
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try:
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sys.path.insert(0, tempdir)
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yield name, path
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sys.path.remove(tempdir)
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finally:
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if old_module is not None:
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sys.modules[name] = old_module
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elif name in sys.modules:
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del sys.modules[name]
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class ImportTests(unittest.TestCase):
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def setUp(self):
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remove_files(TESTFN)
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importlib.invalidate_caches()
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def tearDown(self):
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unload(TESTFN)
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def test_import_raises_ModuleNotFoundError(self):
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with self.assertRaises(ModuleNotFoundError):
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import something_that_should_not_exist_anywhere
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def test_from_import_missing_module_raises_ModuleNotFoundError(self):
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with self.assertRaises(ModuleNotFoundError):
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from something_that_should_not_exist_anywhere import blah
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def test_from_import_missing_attr_raises_ImportError(self):
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with self.assertRaises(ImportError):
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from importlib import something_that_should_not_exist_anywhere
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def test_from_import_missing_attr_has_name_and_path(self):
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with self.assertRaises(ImportError) as cm:
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from os import i_dont_exist
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self.assertEqual(cm.exception.name, 'os')
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self.assertEqual(cm.exception.path, os.__file__)
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self.assertRegex(str(cm.exception), r"cannot import name 'i_dont_exist' from 'os' \(.*os.py\)")
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@cpython_only
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def test_from_import_missing_attr_has_name_and_so_path(self):
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import _testcapi
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with self.assertRaises(ImportError) as cm:
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from _testcapi import i_dont_exist
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self.assertEqual(cm.exception.name, '_testcapi')
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self.assertEqual(cm.exception.path, _testcapi.__file__)
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self.assertRegex(str(cm.exception), r"cannot import name 'i_dont_exist' from '_testcapi' \(.*\.(so|pyd)\)")
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def test_from_import_missing_attr_has_name(self):
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with self.assertRaises(ImportError) as cm:
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# _warning has no path as it's a built-in module.
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from _warning import i_dont_exist
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self.assertEqual(cm.exception.name, '_warning')
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self.assertIsNone(cm.exception.path)
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def test_from_import_missing_attr_path_is_canonical(self):
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with self.assertRaises(ImportError) as cm:
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from os.path import i_dont_exist
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self.assertIn(cm.exception.name, {'posixpath', 'ntpath'})
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self.assertIsNotNone(cm.exception)
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def test_from_import_star_invalid_type(self):
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import re
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with _ready_to_import() as (name, path):
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with open(path, 'w') as f:
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f.write("__all__ = [b'invalid_type']")
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globals = {}
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with self.assertRaisesRegex(
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TypeError, f"{re.escape(name)}\\.__all__ must be str"
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):
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exec(f"from {name} import *", globals)
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self.assertNotIn(b"invalid_type", globals)
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with _ready_to_import() as (name, path):
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with open(path, 'w') as f:
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f.write("globals()[b'invalid_type'] = object()")
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globals = {}
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with self.assertRaisesRegex(
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TypeError, f"{re.escape(name)}\\.__dict__ must be str"
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):
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exec(f"from {name} import *", globals)
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self.assertNotIn(b"invalid_type", globals)
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def test_case_sensitivity(self):
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# Brief digression to test that import is case-sensitive: if we got
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# this far, we know for sure that "random" exists.
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with self.assertRaises(ImportError):
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import RAnDoM
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def test_double_const(self):
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# Another brief digression to test the accuracy of manifest float
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# constants.
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from test import double_const # don't blink -- that *was* the test
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def test_import(self):
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def test_with_extension(ext):
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# The extension is normally ".py", perhaps ".pyw".
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source = TESTFN + ext
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if is_jython:
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pyc = TESTFN + "$py.class"
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else:
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pyc = TESTFN + ".pyc"
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with open(source, "w") as f:
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print("# This tests Python's ability to import a",
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ext, "file.", file=f)
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a = random.randrange(1000)
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b = random.randrange(1000)
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print("a =", a, file=f)
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print("b =", b, file=f)
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if TESTFN in sys.modules:
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del sys.modules[TESTFN]
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importlib.invalidate_caches()
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try:
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try:
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mod = __import__(TESTFN)
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except ImportError as err:
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self.fail("import from %s failed: %s" % (ext, err))
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self.assertEqual(mod.a, a,
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"module loaded (%s) but contents invalid" % mod)
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self.assertEqual(mod.b, b,
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"module loaded (%s) but contents invalid" % mod)
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finally:
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forget(TESTFN)
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unlink(source)
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unlink(pyc)
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sys.path.insert(0, os.curdir)
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try:
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test_with_extension(".py")
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if sys.platform.startswith("win"):
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for ext in [".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw"]:
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test_with_extension(ext)
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finally:
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del sys.path[0]
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def test_module_with_large_stack(self, module='longlist'):
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# Regression test for http://bugs.python.org/issue561858.
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filename = module + '.py'
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# Create a file with a list of 65000 elements.
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with open(filename, 'w') as f:
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f.write('d = [\n')
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for i in range(65000):
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f.write('"",\n')
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f.write(']')
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try:
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# Compile & remove .py file; we only need .pyc.
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# Bytecode must be relocated from the PEP 3147 bytecode-only location.
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py_compile.compile(filename)
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finally:
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unlink(filename)
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# Need to be able to load from current dir.
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sys.path.append('')
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importlib.invalidate_caches()
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namespace = {}
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try:
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make_legacy_pyc(filename)
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# This used to crash.
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exec('import ' + module, None, namespace)
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finally:
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# Cleanup.
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del sys.path[-1]
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unlink(filename + 'c')
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unlink(filename + 'o')
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# Remove references to the module (unload the module)
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namespace.clear()
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try:
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del sys.modules[module]
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except KeyError:
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pass
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def test_failing_import_sticks(self):
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source = TESTFN + ".py"
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with open(source, "w") as f:
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print("a = 1/0", file=f)
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# New in 2.4, we shouldn't be able to import that no matter how often
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# we try.
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sys.path.insert(0, os.curdir)
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importlib.invalidate_caches()
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if TESTFN in sys.modules:
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del sys.modules[TESTFN]
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try:
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for i in [1, 2, 3]:
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self.assertRaises(ZeroDivisionError, __import__, TESTFN)
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self.assertNotIn(TESTFN, sys.modules,
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"damaged module in sys.modules on %i try" % i)
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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def test_import_name_binding(self):
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# import x.y.z binds x in the current namespace
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import test as x
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import test.support
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self.assertIs(x, test, x.__name__)
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self.assertTrue(hasattr(test.support, "__file__"))
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# import x.y.z as w binds z as w
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import test.support as y
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self.assertIs(y, test.support, y.__name__)
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def test_issue31286(self):
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# import in a 'finally' block resulted in SystemError
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try:
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x = ...
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finally:
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import test.support.script_helper as x
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# import in a 'while' loop resulted in stack overflow
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i = 0
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while i < 10:
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import test.support.script_helper as x
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i += 1
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# import in a 'for' loop resulted in segmentation fault
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for i in range(2):
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import test.support.script_helper as x
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def test_failing_reload(self):
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# A failing reload should leave the module object in sys.modules.
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source = TESTFN + os.extsep + "py"
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with open(source, "w") as f:
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f.write("a = 1\nb=2\n")
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sys.path.insert(0, os.curdir)
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try:
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mod = __import__(TESTFN)
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self.assertIn(TESTFN, sys.modules)
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self.assertEqual(mod.a, 1, "module has wrong attribute values")
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self.assertEqual(mod.b, 2, "module has wrong attribute values")
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# On WinXP, just replacing the .py file wasn't enough to
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# convince reload() to reparse it. Maybe the timestamp didn't
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# move enough. We force it to get reparsed by removing the
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# compiled file too.
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remove_files(TESTFN)
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# Now damage the module.
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with open(source, "w") as f:
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f.write("a = 10\nb=20//0\n")
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self.assertRaises(ZeroDivisionError, importlib.reload, mod)
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# But we still expect the module to be in sys.modules.
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mod = sys.modules.get(TESTFN)
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self.assertIsNotNone(mod, "expected module to be in sys.modules")
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# We should have replaced a w/ 10, but the old b value should
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# stick.
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self.assertEqual(mod.a, 10, "module has wrong attribute values")
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self.assertEqual(mod.b, 2, "module has wrong attribute values")
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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unload(TESTFN)
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@skip_if_dont_write_bytecode
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def test_file_to_source(self):
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# check if __file__ points to the source file where available
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source = TESTFN + ".py"
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with open(source, "w") as f:
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f.write("test = None\n")
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sys.path.insert(0, os.curdir)
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try:
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mod = __import__(TESTFN)
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self.assertTrue(mod.__file__.endswith('.py'))
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os.remove(source)
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del sys.modules[TESTFN]
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make_legacy_pyc(source)
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importlib.invalidate_caches()
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mod = __import__(TESTFN)
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base, ext = os.path.splitext(mod.__file__)
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self.assertEqual(ext, '.pyc')
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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if TESTFN in sys.modules:
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del sys.modules[TESTFN]
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def test_import_by_filename(self):
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path = os.path.abspath(TESTFN)
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encoding = sys.getfilesystemencoding()
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try:
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path.encode(encoding)
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except UnicodeEncodeError:
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self.skipTest('path is not encodable to {}'.format(encoding))
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with self.assertRaises(ImportError) as c:
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__import__(path)
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def test_import_in_del_does_not_crash(self):
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# Issue 4236
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testfn = script_helper.make_script('', TESTFN, textwrap.dedent("""\
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import sys
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class C:
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def __del__(self):
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import importlib
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sys.argv.insert(0, C())
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"""))
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script_helper.assert_python_ok(testfn)
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@skip_if_dont_write_bytecode
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def test_timestamp_overflow(self):
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# A modification timestamp larger than 2**32 should not be a problem
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# when importing a module (issue #11235).
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sys.path.insert(0, os.curdir)
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try:
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source = TESTFN + ".py"
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compiled = importlib.util.cache_from_source(source)
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with open(source, 'w') as f:
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pass
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try:
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os.utime(source, (2 ** 33 - 5, 2 ** 33 - 5))
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except OverflowError:
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self.skipTest("cannot set modification time to large integer")
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except OSError as e:
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if e.errno not in (getattr(errno, 'EOVERFLOW', None),
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getattr(errno, 'EINVAL', None)):
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raise
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self.skipTest("cannot set modification time to large integer ({})".format(e))
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__import__(TESTFN)
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# The pyc file was created.
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os.stat(compiled)
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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def test_bogus_fromlist(self):
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try:
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__import__('http', fromlist=['blah'])
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except ImportError:
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self.fail("fromlist must allow bogus names")
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@cpython_only
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def test_delete_builtins_import(self):
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args = ["-c", "del __builtins__.__import__; import os"]
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popen = script_helper.spawn_python(*args)
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stdout, stderr = popen.communicate()
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self.assertIn(b"ImportError", stdout)
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def test_from_import_message_for_nonexistent_module(self):
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with self.assertRaisesRegex(ImportError, "^No module named 'bogus'"):
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from bogus import foo
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def test_from_import_message_for_existing_module(self):
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with self.assertRaisesRegex(ImportError, "^cannot import name 'bogus'"):
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from re import bogus
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|
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def test_from_import_AttributeError(self):
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# Issue #24492: trying to import an attribute that raises an
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# AttributeError should lead to an ImportError.
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class AlwaysAttributeError:
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def __getattr__(self, _):
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raise AttributeError
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module_name = 'test_from_import_AttributeError'
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self.addCleanup(unload, module_name)
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sys.modules[module_name] = AlwaysAttributeError()
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with self.assertRaises(ImportError) as cm:
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from test_from_import_AttributeError import does_not_exist
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self.assertEqual(str(cm.exception),
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"cannot import name 'does_not_exist' from '<unknown module name>' (unknown location)")
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|
|
@cpython_only
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def test_issue31492(self):
|
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# There shouldn't be an assertion failure in case of failing to import
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# from a module with a bad __name__ attribute, or in case of failing
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|
# to access an attribute of such a module.
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with swap_attr(os, '__name__', None):
|
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with self.assertRaises(ImportError):
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from os import does_not_exist
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|
|
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with self.assertRaises(AttributeError):
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os.does_not_exist
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|
|
|
def test_concurrency(self):
|
|
# bpo 38091: this is a hack to slow down the code that calls
|
|
# has_deadlock(); the logic was itself sometimes deadlocking.
|
|
def delay_has_deadlock(frame, event, arg):
|
|
if event == 'call' and frame.f_code.co_name == 'has_deadlock':
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time.sleep(0.1)
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|
|
|
sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'data'))
|
|
try:
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|
exc = None
|
|
def run():
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|
sys.settrace(delay_has_deadlock)
|
|
event.wait()
|
|
try:
|
|
import package
|
|
except BaseException as e:
|
|
nonlocal exc
|
|
exc = e
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|
sys.settrace(None)
|
|
|
|
for i in range(10):
|
|
event = threading.Event()
|
|
threads = [threading.Thread(target=run) for x in range(2)]
|
|
try:
|
|
with threading_helper.start_threads(threads, event.set):
|
|
time.sleep(0)
|
|
finally:
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|
sys.modules.pop('package', None)
|
|
sys.modules.pop('package.submodule', None)
|
|
if exc is not None:
|
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raise exc
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|
finally:
|
|
del sys.path[0]
|
|
|
|
@unittest.skipUnless(sys.platform == "win32", "Windows-specific")
|
|
def test_dll_dependency_import(self):
|
|
from _winapi import GetModuleFileName
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|
dllname = GetModuleFileName(sys.dllhandle)
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pydname = importlib.util.find_spec("_sqlite3").origin
|
|
depname = os.path.join(
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os.path.dirname(pydname),
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"sqlite3{}.dll".format("_d" if "_d" in pydname else ""))
|
|
|
|
with test.support.temp_dir() as tmp:
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|
tmp2 = os.path.join(tmp, "DLLs")
|
|
os.mkdir(tmp2)
|
|
|
|
pyexe = os.path.join(tmp, os.path.basename(sys.executable))
|
|
shutil.copy(sys.executable, pyexe)
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|
shutil.copy(dllname, tmp)
|
|
for f in glob.glob(os.path.join(sys.prefix, "vcruntime*.dll")):
|
|
shutil.copy(f, tmp)
|
|
|
|
shutil.copy(pydname, tmp2)
|
|
|
|
env = None
|
|
env = {k.upper(): os.environ[k] for k in os.environ}
|
|
env["PYTHONPATH"] = tmp2 + ";" + os.path.dirname(os.__file__)
|
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|
|
# Test 1: import with added DLL directory
|
|
subprocess.check_call([
|
|
pyexe, "-Sc", ";".join([
|
|
"import os",
|
|
"p = os.add_dll_directory({!r})".format(
|
|
os.path.dirname(depname)),
|
|
"import _sqlite3",
|
|
"p.close"
|
|
])],
|
|
stderr=subprocess.STDOUT,
|
|
env=env,
|
|
cwd=os.path.dirname(pyexe))
|
|
|
|
# Test 2: import with DLL adjacent to PYD
|
|
shutil.copy(depname, tmp2)
|
|
subprocess.check_call([pyexe, "-Sc", "import _sqlite3"],
|
|
stderr=subprocess.STDOUT,
|
|
env=env,
|
|
cwd=os.path.dirname(pyexe))
|
|
|
|
|
|
@skip_if_dont_write_bytecode
|
|
class FilePermissionTests(unittest.TestCase):
|
|
# tests for file mode on cached .pyc files
|
|
|
|
@unittest.skipUnless(os.name == 'posix',
|
|
"test meaningful only on posix systems")
|
|
def test_creation_mode(self):
|
|
mask = 0o022
|
|
with temp_umask(mask), _ready_to_import() as (name, path):
|
|
cached_path = importlib.util.cache_from_source(path)
|
|
module = __import__(name)
|
|
if not os.path.exists(cached_path):
|
|
self.fail("__import__ did not result in creation of "
|
|
"a .pyc file")
|
|
stat_info = os.stat(cached_path)
|
|
|
|
# Check that the umask is respected, and the executable bits
|
|
# aren't set.
|
|
self.assertEqual(oct(stat.S_IMODE(stat_info.st_mode)),
|
|
oct(0o666 & ~mask))
|
|
|
|
@unittest.skipUnless(os.name == 'posix',
|
|
"test meaningful only on posix systems")
|
|
def test_cached_mode_issue_2051(self):
|
|
# permissions of .pyc should match those of .py, regardless of mask
|
|
mode = 0o600
|
|
with temp_umask(0o022), _ready_to_import() as (name, path):
|
|
cached_path = importlib.util.cache_from_source(path)
|
|
os.chmod(path, mode)
|
|
__import__(name)
|
|
if not os.path.exists(cached_path):
|
|
self.fail("__import__ did not result in creation of "
|
|
"a .pyc file")
|
|
stat_info = os.stat(cached_path)
|
|
|
|
self.assertEqual(oct(stat.S_IMODE(stat_info.st_mode)), oct(mode))
|
|
|
|
@unittest.skipUnless(os.name == 'posix',
|
|
"test meaningful only on posix systems")
|
|
def test_cached_readonly(self):
|
|
mode = 0o400
|
|
with temp_umask(0o022), _ready_to_import() as (name, path):
|
|
cached_path = importlib.util.cache_from_source(path)
|
|
os.chmod(path, mode)
|
|
__import__(name)
|
|
if not os.path.exists(cached_path):
|
|
self.fail("__import__ did not result in creation of "
|
|
"a .pyc file")
|
|
stat_info = os.stat(cached_path)
|
|
|
|
expected = mode | 0o200 # Account for fix for issue #6074
|
|
self.assertEqual(oct(stat.S_IMODE(stat_info.st_mode)), oct(expected))
|
|
|
|
def test_pyc_always_writable(self):
|
|
# Initially read-only .pyc files on Windows used to cause problems
|
|
# with later updates, see issue #6074 for details
|
|
with _ready_to_import() as (name, path):
|
|
# Write a Python file, make it read-only and import it
|
|
with open(path, 'w') as f:
|
|
f.write("x = 'original'\n")
|
|
# Tweak the mtime of the source to ensure pyc gets updated later
|
|
s = os.stat(path)
|
|
os.utime(path, (s.st_atime, s.st_mtime-100000000))
|
|
os.chmod(path, 0o400)
|
|
m = __import__(name)
|
|
self.assertEqual(m.x, 'original')
|
|
# Change the file and then reimport it
|
|
os.chmod(path, 0o600)
|
|
with open(path, 'w') as f:
|
|
f.write("x = 'rewritten'\n")
|
|
unload(name)
|
|
importlib.invalidate_caches()
|
|
m = __import__(name)
|
|
self.assertEqual(m.x, 'rewritten')
|
|
# Now delete the source file and check the pyc was rewritten
|
|
unlink(path)
|
|
unload(name)
|
|
importlib.invalidate_caches()
|
|
bytecode_only = path + "c"
|
|
os.rename(importlib.util.cache_from_source(path), bytecode_only)
|
|
m = __import__(name)
|
|
self.assertEqual(m.x, 'rewritten')
|
|
|
|
|
|
class PycRewritingTests(unittest.TestCase):
|
|
# Test that the `co_filename` attribute on code objects always points
|
|
# to the right file, even when various things happen (e.g. both the .py
|
|
# and the .pyc file are renamed).
|
|
|
|
module_name = "unlikely_module_name"
|
|
module_source = """
|
|
import sys
|
|
code_filename = sys._getframe().f_code.co_filename
|
|
module_filename = __file__
|
|
constant = 1
|
|
def func():
|
|
pass
|
|
func_filename = func.__code__.co_filename
|
|
"""
|
|
dir_name = os.path.abspath(TESTFN)
|
|
file_name = os.path.join(dir_name, module_name) + os.extsep + "py"
|
|
compiled_name = importlib.util.cache_from_source(file_name)
|
|
|
|
def setUp(self):
|
|
self.sys_path = sys.path[:]
|
|
self.orig_module = sys.modules.pop(self.module_name, None)
|
|
os.mkdir(self.dir_name)
|
|
with open(self.file_name, "w") as f:
|
|
f.write(self.module_source)
|
|
sys.path.insert(0, self.dir_name)
|
|
importlib.invalidate_caches()
|
|
|
|
def tearDown(self):
|
|
sys.path[:] = self.sys_path
|
|
if self.orig_module is not None:
|
|
sys.modules[self.module_name] = self.orig_module
|
|
else:
|
|
unload(self.module_name)
|
|
unlink(self.file_name)
|
|
unlink(self.compiled_name)
|
|
rmtree(self.dir_name)
|
|
|
|
def import_module(self):
|
|
ns = globals()
|
|
__import__(self.module_name, ns, ns)
|
|
return sys.modules[self.module_name]
|
|
|
|
def test_basics(self):
|
|
mod = self.import_module()
|
|
self.assertEqual(mod.module_filename, self.file_name)
|
|
self.assertEqual(mod.code_filename, self.file_name)
|
|
self.assertEqual(mod.func_filename, self.file_name)
|
|
del sys.modules[self.module_name]
|
|
mod = self.import_module()
|
|
self.assertEqual(mod.module_filename, self.file_name)
|
|
self.assertEqual(mod.code_filename, self.file_name)
|
|
self.assertEqual(mod.func_filename, self.file_name)
|
|
|
|
def test_incorrect_code_name(self):
|
|
py_compile.compile(self.file_name, dfile="another_module.py")
|
|
mod = self.import_module()
|
|
self.assertEqual(mod.module_filename, self.file_name)
|
|
self.assertEqual(mod.code_filename, self.file_name)
|
|
self.assertEqual(mod.func_filename, self.file_name)
|
|
|
|
def test_module_without_source(self):
|
|
target = "another_module.py"
|
|
py_compile.compile(self.file_name, dfile=target)
|
|
os.remove(self.file_name)
|
|
pyc_file = make_legacy_pyc(self.file_name)
|
|
importlib.invalidate_caches()
|
|
mod = self.import_module()
|
|
self.assertEqual(mod.module_filename, pyc_file)
|
|
self.assertEqual(mod.code_filename, target)
|
|
self.assertEqual(mod.func_filename, target)
|
|
|
|
def test_foreign_code(self):
|
|
py_compile.compile(self.file_name)
|
|
with open(self.compiled_name, "rb") as f:
|
|
header = f.read(16)
|
|
code = marshal.load(f)
|
|
constants = list(code.co_consts)
|
|
foreign_code = importlib.import_module.__code__
|
|
pos = constants.index(1)
|
|
constants[pos] = foreign_code
|
|
code = code.replace(co_consts=tuple(constants))
|
|
with open(self.compiled_name, "wb") as f:
|
|
f.write(header)
|
|
marshal.dump(code, f)
|
|
mod = self.import_module()
|
|
self.assertEqual(mod.constant.co_filename, foreign_code.co_filename)
|
|
|
|
|
|
class PathsTests(unittest.TestCase):
|
|
SAMPLES = ('test', 'test\u00e4\u00f6\u00fc\u00df', 'test\u00e9\u00e8',
|
|
'test\u00b0\u00b3\u00b2')
|
|
path = TESTFN
|
|
|
|
def setUp(self):
|
|
os.mkdir(self.path)
|
|
self.syspath = sys.path[:]
|
|
|
|
def tearDown(self):
|
|
rmtree(self.path)
|
|
sys.path[:] = self.syspath
|
|
|
|
# Regression test for http://bugs.python.org/issue1293.
|
|
def test_trailing_slash(self):
|
|
with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f:
|
|
f.write("testdata = 'test_trailing_slash'")
|
|
sys.path.append(self.path+'/')
|
|
mod = __import__("test_trailing_slash")
|
|
self.assertEqual(mod.testdata, 'test_trailing_slash')
|
|
unload("test_trailing_slash")
|
|
|
|
# Regression test for http://bugs.python.org/issue3677.
|
|
@unittest.skipUnless(sys.platform == 'win32', 'Windows-specific')
|
|
def test_UNC_path(self):
|
|
with open(os.path.join(self.path, 'test_unc_path.py'), 'w') as f:
|
|
f.write("testdata = 'test_unc_path'")
|
|
importlib.invalidate_caches()
|
|
# Create the UNC path, like \\myhost\c$\foo\bar.
|
|
path = os.path.abspath(self.path)
|
|
import socket
|
|
hn = socket.gethostname()
|
|
drive = path[0]
|
|
unc = "\\\\%s\\%s$"%(hn, drive)
|
|
unc += path[2:]
|
|
try:
|
|
os.listdir(unc)
|
|
except OSError as e:
|
|
if e.errno in (errno.EPERM, errno.EACCES, errno.ENOENT):
|
|
# See issue #15338
|
|
self.skipTest("cannot access administrative share %r" % (unc,))
|
|
raise
|
|
sys.path.insert(0, unc)
|
|
try:
|
|
mod = __import__("test_unc_path")
|
|
except ImportError as e:
|
|
self.fail("could not import 'test_unc_path' from %r: %r"
|
|
% (unc, e))
|
|
self.assertEqual(mod.testdata, 'test_unc_path')
|
|
self.assertTrue(mod.__file__.startswith(unc), mod.__file__)
|
|
unload("test_unc_path")
|
|
|
|
|
|
class RelativeImportTests(unittest.TestCase):
|
|
|
|
def tearDown(self):
|
|
unload("test.relimport")
|
|
setUp = tearDown
|
|
|
|
def test_relimport_star(self):
|
|
# This will import * from .test_import.
|
|
from .. import relimport
|
|
self.assertTrue(hasattr(relimport, "RelativeImportTests"))
|
|
|
|
def test_issue3221(self):
|
|
# Note for mergers: the 'absolute' tests from the 2.x branch
|
|
# are missing in Py3k because implicit relative imports are
|
|
# a thing of the past
|
|
#
|
|
# Regression test for http://bugs.python.org/issue3221.
|
|
def check_relative():
|
|
exec("from . import relimport", ns)
|
|
|
|
# Check relative import OK with __package__ and __name__ correct
|
|
ns = dict(__package__='test', __name__='test.notarealmodule')
|
|
check_relative()
|
|
|
|
# Check relative import OK with only __name__ wrong
|
|
ns = dict(__package__='test', __name__='notarealpkg.notarealmodule')
|
|
check_relative()
|
|
|
|
# Check relative import fails with only __package__ wrong
|
|
ns = dict(__package__='foo', __name__='test.notarealmodule')
|
|
self.assertRaises(ModuleNotFoundError, check_relative)
|
|
|
|
# Check relative import fails with __package__ and __name__ wrong
|
|
ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule')
|
|
self.assertRaises(ModuleNotFoundError, check_relative)
|
|
|
|
# Check relative import fails with package set to a non-string
|
|
ns = dict(__package__=object())
|
|
self.assertRaises(TypeError, check_relative)
|
|
|
|
def test_parentless_import_shadowed_by_global(self):
|
|
# Test as if this were done from the REPL where this error most commonly occurs (bpo-37409).
|
|
script_helper.assert_python_failure('-W', 'ignore', '-c',
|
|
"foo = 1; from . import foo")
|
|
|
|
def test_absolute_import_without_future(self):
|
|
# If explicit relative import syntax is used, then do not try
|
|
# to perform an absolute import in the face of failure.
|
|
# Issue #7902.
|
|
with self.assertRaises(ImportError):
|
|
from .os import sep
|
|
self.fail("explicit relative import triggered an "
|
|
"implicit absolute import")
|
|
|
|
def test_import_from_non_package(self):
|
|
path = os.path.join(os.path.dirname(__file__), 'data', 'package2')
|
|
with uncache('submodule1', 'submodule2'), DirsOnSysPath(path):
|
|
with self.assertRaises(ImportError):
|
|
import submodule1
|
|
self.assertNotIn('submodule1', sys.modules)
|
|
self.assertNotIn('submodule2', sys.modules)
|
|
|
|
def test_import_from_unloaded_package(self):
|
|
with uncache('package2', 'package2.submodule1', 'package2.submodule2'), \
|
|
DirsOnSysPath(os.path.join(os.path.dirname(__file__), 'data')):
|
|
import package2.submodule1
|
|
package2.submodule1.submodule2
|
|
|
|
|
|
class OverridingImportBuiltinTests(unittest.TestCase):
|
|
def test_override_builtin(self):
|
|
# Test that overriding builtins.__import__ can bypass sys.modules.
|
|
import os
|
|
|
|
def foo():
|
|
import os
|
|
return os
|
|
self.assertEqual(foo(), os) # Quick sanity check.
|
|
|
|
with swap_attr(builtins, "__import__", lambda *x: 5):
|
|
self.assertEqual(foo(), 5)
|
|
|
|
# Test what happens when we shadow __import__ in globals(); this
|
|
# currently does not impact the import process, but if this changes,
|
|
# other code will need to change, so keep this test as a tripwire.
|
|
with swap_item(globals(), "__import__", lambda *x: 5):
|
|
self.assertEqual(foo(), os)
|
|
|
|
|
|
class PycacheTests(unittest.TestCase):
|
|
# Test the various PEP 3147/488-related behaviors.
|
|
|
|
def _clean(self):
|
|
forget(TESTFN)
|
|
rmtree('__pycache__')
|
|
unlink(self.source)
|
|
|
|
def setUp(self):
|
|
self.source = TESTFN + '.py'
|
|
self._clean()
|
|
with open(self.source, 'w') as fp:
|
|
print('# This is a test file written by test_import.py', file=fp)
|
|
sys.path.insert(0, os.curdir)
|
|
importlib.invalidate_caches()
|
|
|
|
def tearDown(self):
|
|
assert sys.path[0] == os.curdir, 'Unexpected sys.path[0]'
|
|
del sys.path[0]
|
|
self._clean()
|
|
|
|
@skip_if_dont_write_bytecode
|
|
def test_import_pyc_path(self):
|
|
self.assertFalse(os.path.exists('__pycache__'))
|
|
__import__(TESTFN)
|
|
self.assertTrue(os.path.exists('__pycache__'))
|
|
pyc_path = importlib.util.cache_from_source(self.source)
|
|
self.assertTrue(os.path.exists(pyc_path),
|
|
'bytecode file {!r} for {!r} does not '
|
|
'exist'.format(pyc_path, TESTFN))
|
|
|
|
@unittest.skipUnless(os.name == 'posix',
|
|
"test meaningful only on posix systems")
|
|
@unittest.skipIf(hasattr(os, 'geteuid') and os.geteuid() == 0,
|
|
"due to varying filesystem permission semantics (issue #11956)")
|
|
@skip_if_dont_write_bytecode
|
|
def test_unwritable_directory(self):
|
|
# When the umask causes the new __pycache__ directory to be
|
|
# unwritable, the import still succeeds but no .pyc file is written.
|
|
with temp_umask(0o222):
|
|
__import__(TESTFN)
|
|
self.assertTrue(os.path.exists('__pycache__'))
|
|
pyc_path = importlib.util.cache_from_source(self.source)
|
|
self.assertFalse(os.path.exists(pyc_path),
|
|
'bytecode file {!r} for {!r} '
|
|
'exists'.format(pyc_path, TESTFN))
|
|
|
|
@skip_if_dont_write_bytecode
|
|
def test_missing_source(self):
|
|
# With PEP 3147 cache layout, removing the source but leaving the pyc
|
|
# file does not satisfy the import.
|
|
__import__(TESTFN)
|
|
pyc_file = importlib.util.cache_from_source(self.source)
|
|
self.assertTrue(os.path.exists(pyc_file))
|
|
os.remove(self.source)
|
|
forget(TESTFN)
|
|
importlib.invalidate_caches()
|
|
self.assertRaises(ImportError, __import__, TESTFN)
|
|
|
|
@skip_if_dont_write_bytecode
|
|
def test_missing_source_legacy(self):
|
|
# Like test_missing_source() except that for backward compatibility,
|
|
# when the pyc file lives where the py file would have been (and named
|
|
# without the tag), it is importable. The __file__ of the imported
|
|
# module is the pyc location.
|
|
__import__(TESTFN)
|
|
# pyc_file gets removed in _clean() via tearDown().
|
|
pyc_file = make_legacy_pyc(self.source)
|
|
os.remove(self.source)
|
|
unload(TESTFN)
|
|
importlib.invalidate_caches()
|
|
m = __import__(TESTFN)
|
|
try:
|
|
self.assertEqual(m.__file__,
|
|
os.path.join(os.curdir, os.path.relpath(pyc_file)))
|
|
finally:
|
|
os.remove(pyc_file)
|
|
|
|
def test___cached__(self):
|
|
# Modules now also have an __cached__ that points to the pyc file.
|
|
m = __import__(TESTFN)
|
|
pyc_file = importlib.util.cache_from_source(TESTFN + '.py')
|
|
self.assertEqual(m.__cached__, os.path.join(os.curdir, pyc_file))
|
|
|
|
@skip_if_dont_write_bytecode
|
|
def test___cached___legacy_pyc(self):
|
|
# Like test___cached__() except that for backward compatibility,
|
|
# when the pyc file lives where the py file would have been (and named
|
|
# without the tag), it is importable. The __cached__ of the imported
|
|
# module is the pyc location.
|
|
__import__(TESTFN)
|
|
# pyc_file gets removed in _clean() via tearDown().
|
|
pyc_file = make_legacy_pyc(self.source)
|
|
os.remove(self.source)
|
|
unload(TESTFN)
|
|
importlib.invalidate_caches()
|
|
m = __import__(TESTFN)
|
|
self.assertEqual(m.__cached__,
|
|
os.path.join(os.curdir, os.path.relpath(pyc_file)))
|
|
|
|
@skip_if_dont_write_bytecode
|
|
def test_package___cached__(self):
|
|
# Like test___cached__ but for packages.
|
|
def cleanup():
|
|
rmtree('pep3147')
|
|
unload('pep3147.foo')
|
|
unload('pep3147')
|
|
os.mkdir('pep3147')
|
|
self.addCleanup(cleanup)
|
|
# Touch the __init__.py
|
|
with open(os.path.join('pep3147', '__init__.py'), 'w'):
|
|
pass
|
|
with open(os.path.join('pep3147', 'foo.py'), 'w'):
|
|
pass
|
|
importlib.invalidate_caches()
|
|
m = __import__('pep3147.foo')
|
|
init_pyc = importlib.util.cache_from_source(
|
|
os.path.join('pep3147', '__init__.py'))
|
|
self.assertEqual(m.__cached__, os.path.join(os.curdir, init_pyc))
|
|
foo_pyc = importlib.util.cache_from_source(os.path.join('pep3147', 'foo.py'))
|
|
self.assertEqual(sys.modules['pep3147.foo'].__cached__,
|
|
os.path.join(os.curdir, foo_pyc))
|
|
|
|
def test_package___cached___from_pyc(self):
|
|
# Like test___cached__ but ensuring __cached__ when imported from a
|
|
# PEP 3147 pyc file.
|
|
def cleanup():
|
|
rmtree('pep3147')
|
|
unload('pep3147.foo')
|
|
unload('pep3147')
|
|
os.mkdir('pep3147')
|
|
self.addCleanup(cleanup)
|
|
# Touch the __init__.py
|
|
with open(os.path.join('pep3147', '__init__.py'), 'w'):
|
|
pass
|
|
with open(os.path.join('pep3147', 'foo.py'), 'w'):
|
|
pass
|
|
importlib.invalidate_caches()
|
|
m = __import__('pep3147.foo')
|
|
unload('pep3147.foo')
|
|
unload('pep3147')
|
|
importlib.invalidate_caches()
|
|
m = __import__('pep3147.foo')
|
|
init_pyc = importlib.util.cache_from_source(
|
|
os.path.join('pep3147', '__init__.py'))
|
|
self.assertEqual(m.__cached__, os.path.join(os.curdir, init_pyc))
|
|
foo_pyc = importlib.util.cache_from_source(os.path.join('pep3147', 'foo.py'))
|
|
self.assertEqual(sys.modules['pep3147.foo'].__cached__,
|
|
os.path.join(os.curdir, foo_pyc))
|
|
|
|
def test_recompute_pyc_same_second(self):
|
|
# Even when the source file doesn't change timestamp, a change in
|
|
# source size is enough to trigger recomputation of the pyc file.
|
|
__import__(TESTFN)
|
|
unload(TESTFN)
|
|
with open(self.source, 'a') as fp:
|
|
print("x = 5", file=fp)
|
|
m = __import__(TESTFN)
|
|
self.assertEqual(m.x, 5)
|
|
|
|
|
|
class TestSymbolicallyLinkedPackage(unittest.TestCase):
|
|
package_name = 'sample'
|
|
tagged = package_name + '-tagged'
|
|
|
|
def setUp(self):
|
|
test.support.rmtree(self.tagged)
|
|
test.support.rmtree(self.package_name)
|
|
self.orig_sys_path = sys.path[:]
|
|
|
|
# create a sample package; imagine you have a package with a tag and
|
|
# you want to symbolically link it from its untagged name.
|
|
os.mkdir(self.tagged)
|
|
self.addCleanup(test.support.rmtree, self.tagged)
|
|
init_file = os.path.join(self.tagged, '__init__.py')
|
|
test.support.create_empty_file(init_file)
|
|
assert os.path.exists(init_file)
|
|
|
|
# now create a symlink to the tagged package
|
|
# sample -> sample-tagged
|
|
os.symlink(self.tagged, self.package_name, target_is_directory=True)
|
|
self.addCleanup(test.support.unlink, self.package_name)
|
|
importlib.invalidate_caches()
|
|
|
|
self.assertEqual(os.path.isdir(self.package_name), True)
|
|
|
|
assert os.path.isfile(os.path.join(self.package_name, '__init__.py'))
|
|
|
|
def tearDown(self):
|
|
sys.path[:] = self.orig_sys_path
|
|
|
|
# regression test for issue6727
|
|
@unittest.skipUnless(
|
|
not hasattr(sys, 'getwindowsversion')
|
|
or sys.getwindowsversion() >= (6, 0),
|
|
"Windows Vista or later required")
|
|
@test.support.skip_unless_symlink
|
|
def test_symlinked_dir_importable(self):
|
|
# make sure sample can only be imported from the current directory.
|
|
sys.path[:] = ['.']
|
|
assert os.path.exists(self.package_name)
|
|
assert os.path.exists(os.path.join(self.package_name, '__init__.py'))
|
|
|
|
# Try to import the package
|
|
importlib.import_module(self.package_name)
|
|
|
|
|
|
@cpython_only
|
|
class ImportlibBootstrapTests(unittest.TestCase):
|
|
# These tests check that importlib is bootstrapped.
|
|
|
|
def test_frozen_importlib(self):
|
|
mod = sys.modules['_frozen_importlib']
|
|
self.assertTrue(mod)
|
|
|
|
def test_frozen_importlib_is_bootstrap(self):
|
|
from importlib import _bootstrap
|
|
mod = sys.modules['_frozen_importlib']
|
|
self.assertIs(mod, _bootstrap)
|
|
self.assertEqual(mod.__name__, 'importlib._bootstrap')
|
|
self.assertEqual(mod.__package__, 'importlib')
|
|
self.assertTrue(mod.__file__.endswith('_bootstrap.py'), mod.__file__)
|
|
|
|
def test_frozen_importlib_external_is_bootstrap_external(self):
|
|
from importlib import _bootstrap_external
|
|
mod = sys.modules['_frozen_importlib_external']
|
|
self.assertIs(mod, _bootstrap_external)
|
|
self.assertEqual(mod.__name__, 'importlib._bootstrap_external')
|
|
self.assertEqual(mod.__package__, 'importlib')
|
|
self.assertTrue(mod.__file__.endswith('_bootstrap_external.py'), mod.__file__)
|
|
|
|
def test_there_can_be_only_one(self):
|
|
# Issue #15386 revealed a tricky loophole in the bootstrapping
|
|
# This test is technically redundant, since the bug caused importing
|
|
# this test module to crash completely, but it helps prove the point
|
|
from importlib import machinery
|
|
mod = sys.modules['_frozen_importlib']
|
|
self.assertIs(machinery.ModuleSpec, mod.ModuleSpec)
|
|
|
|
|
|
@cpython_only
|
|
class GetSourcefileTests(unittest.TestCase):
|
|
|
|
"""Test importlib._bootstrap_external._get_sourcefile() as used by the C API.
|
|
|
|
Because of the peculiarities of the need of this function, the tests are
|
|
knowingly whitebox tests.
|
|
|
|
"""
|
|
|
|
def test_get_sourcefile(self):
|
|
# Given a valid bytecode path, return the path to the corresponding
|
|
# source file if it exists.
|
|
with mock.patch('importlib._bootstrap_external._path_isfile') as _path_isfile:
|
|
_path_isfile.return_value = True;
|
|
path = TESTFN + '.pyc'
|
|
expect = TESTFN + '.py'
|
|
self.assertEqual(_get_sourcefile(path), expect)
|
|
|
|
def test_get_sourcefile_no_source(self):
|
|
# Given a valid bytecode path without a corresponding source path,
|
|
# return the original bytecode path.
|
|
with mock.patch('importlib._bootstrap_external._path_isfile') as _path_isfile:
|
|
_path_isfile.return_value = False;
|
|
path = TESTFN + '.pyc'
|
|
self.assertEqual(_get_sourcefile(path), path)
|
|
|
|
def test_get_sourcefile_bad_ext(self):
|
|
# Given a path with an invalid bytecode extension, return the
|
|
# bytecode path passed as the argument.
|
|
path = TESTFN + '.bad_ext'
|
|
self.assertEqual(_get_sourcefile(path), path)
|
|
|
|
|
|
class ImportTracebackTests(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
os.mkdir(TESTFN)
|
|
self.old_path = sys.path[:]
|
|
sys.path.insert(0, TESTFN)
|
|
|
|
def tearDown(self):
|
|
sys.path[:] = self.old_path
|
|
rmtree(TESTFN)
|
|
|
|
def create_module(self, mod, contents, ext=".py"):
|
|
fname = os.path.join(TESTFN, mod + ext)
|
|
with open(fname, "w") as f:
|
|
f.write(contents)
|
|
self.addCleanup(unload, mod)
|
|
importlib.invalidate_caches()
|
|
return fname
|
|
|
|
def assert_traceback(self, tb, files):
|
|
deduped_files = []
|
|
while tb:
|
|
code = tb.tb_frame.f_code
|
|
fn = code.co_filename
|
|
if not deduped_files or fn != deduped_files[-1]:
|
|
deduped_files.append(fn)
|
|
tb = tb.tb_next
|
|
self.assertEqual(len(deduped_files), len(files), deduped_files)
|
|
for fn, pat in zip(deduped_files, files):
|
|
self.assertIn(pat, fn)
|
|
|
|
def test_nonexistent_module(self):
|
|
try:
|
|
# assertRaises() clears __traceback__
|
|
import nonexistent_xyzzy
|
|
except ImportError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ImportError should have been raised")
|
|
self.assert_traceback(tb, [__file__])
|
|
|
|
def test_nonexistent_module_nested(self):
|
|
self.create_module("foo", "import nonexistent_xyzzy")
|
|
try:
|
|
import foo
|
|
except ImportError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ImportError should have been raised")
|
|
self.assert_traceback(tb, [__file__, 'foo.py'])
|
|
|
|
def test_exec_failure(self):
|
|
self.create_module("foo", "1/0")
|
|
try:
|
|
import foo
|
|
except ZeroDivisionError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ZeroDivisionError should have been raised")
|
|
self.assert_traceback(tb, [__file__, 'foo.py'])
|
|
|
|
def test_exec_failure_nested(self):
|
|
self.create_module("foo", "import bar")
|
|
self.create_module("bar", "1/0")
|
|
try:
|
|
import foo
|
|
except ZeroDivisionError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ZeroDivisionError should have been raised")
|
|
self.assert_traceback(tb, [__file__, 'foo.py', 'bar.py'])
|
|
|
|
# A few more examples from issue #15425
|
|
def test_syntax_error(self):
|
|
self.create_module("foo", "invalid syntax is invalid")
|
|
try:
|
|
import foo
|
|
except SyntaxError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("SyntaxError should have been raised")
|
|
self.assert_traceback(tb, [__file__])
|
|
|
|
def _setup_broken_package(self, parent, child):
|
|
pkg_name = "_parent_foo"
|
|
self.addCleanup(unload, pkg_name)
|
|
pkg_path = os.path.join(TESTFN, pkg_name)
|
|
os.mkdir(pkg_path)
|
|
# Touch the __init__.py
|
|
init_path = os.path.join(pkg_path, '__init__.py')
|
|
with open(init_path, 'w') as f:
|
|
f.write(parent)
|
|
bar_path = os.path.join(pkg_path, 'bar.py')
|
|
with open(bar_path, 'w') as f:
|
|
f.write(child)
|
|
importlib.invalidate_caches()
|
|
return init_path, bar_path
|
|
|
|
def test_broken_submodule(self):
|
|
init_path, bar_path = self._setup_broken_package("", "1/0")
|
|
try:
|
|
import _parent_foo.bar
|
|
except ZeroDivisionError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ZeroDivisionError should have been raised")
|
|
self.assert_traceback(tb, [__file__, bar_path])
|
|
|
|
def test_broken_from(self):
|
|
init_path, bar_path = self._setup_broken_package("", "1/0")
|
|
try:
|
|
from _parent_foo import bar
|
|
except ZeroDivisionError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ImportError should have been raised")
|
|
self.assert_traceback(tb, [__file__, bar_path])
|
|
|
|
def test_broken_parent(self):
|
|
init_path, bar_path = self._setup_broken_package("1/0", "")
|
|
try:
|
|
import _parent_foo.bar
|
|
except ZeroDivisionError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ZeroDivisionError should have been raised")
|
|
self.assert_traceback(tb, [__file__, init_path])
|
|
|
|
def test_broken_parent_from(self):
|
|
init_path, bar_path = self._setup_broken_package("1/0", "")
|
|
try:
|
|
from _parent_foo import bar
|
|
except ZeroDivisionError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ZeroDivisionError should have been raised")
|
|
self.assert_traceback(tb, [__file__, init_path])
|
|
|
|
@cpython_only
|
|
def test_import_bug(self):
|
|
# We simulate a bug in importlib and check that it's not stripped
|
|
# away from the traceback.
|
|
self.create_module("foo", "")
|
|
importlib = sys.modules['_frozen_importlib_external']
|
|
if 'load_module' in vars(importlib.SourceLoader):
|
|
old_exec_module = importlib.SourceLoader.exec_module
|
|
else:
|
|
old_exec_module = None
|
|
try:
|
|
def exec_module(*args):
|
|
1/0
|
|
importlib.SourceLoader.exec_module = exec_module
|
|
try:
|
|
import foo
|
|
except ZeroDivisionError as e:
|
|
tb = e.__traceback__
|
|
else:
|
|
self.fail("ZeroDivisionError should have been raised")
|
|
self.assert_traceback(tb, [__file__, '<frozen importlib', __file__])
|
|
finally:
|
|
if old_exec_module is None:
|
|
del importlib.SourceLoader.exec_module
|
|
else:
|
|
importlib.SourceLoader.exec_module = old_exec_module
|
|
|
|
@unittest.skipUnless(TESTFN_UNENCODABLE, 'need TESTFN_UNENCODABLE')
|
|
def test_unencodable_filename(self):
|
|
# Issue #11619: The Python parser and the import machinery must not
|
|
# encode filenames, especially on Windows
|
|
pyname = script_helper.make_script('', TESTFN_UNENCODABLE, 'pass')
|
|
self.addCleanup(unlink, pyname)
|
|
name = pyname[:-3]
|
|
script_helper.assert_python_ok("-c", "mod = __import__(%a)" % name,
|
|
__isolated=False)
|
|
|
|
|
|
class CircularImportTests(unittest.TestCase):
|
|
|
|
"""See the docstrings of the modules being imported for the purpose of the
|
|
test."""
|
|
|
|
def tearDown(self):
|
|
"""Make sure no modules pre-exist in sys.modules which are being used to
|
|
test."""
|
|
for key in list(sys.modules.keys()):
|
|
if key.startswith('test.test_import.data.circular_imports'):
|
|
del sys.modules[key]
|
|
|
|
def test_direct(self):
|
|
try:
|
|
import test.test_import.data.circular_imports.basic
|
|
except ImportError:
|
|
self.fail('circular import through relative imports failed')
|
|
|
|
def test_indirect(self):
|
|
try:
|
|
import test.test_import.data.circular_imports.indirect
|
|
except ImportError:
|
|
self.fail('relative import in module contributing to circular '
|
|
'import failed')
|
|
|
|
def test_subpackage(self):
|
|
try:
|
|
import test.test_import.data.circular_imports.subpackage
|
|
except ImportError:
|
|
self.fail('circular import involving a subpackage failed')
|
|
|
|
def test_rebinding(self):
|
|
try:
|
|
import test.test_import.data.circular_imports.rebinding as rebinding
|
|
except ImportError:
|
|
self.fail('circular import with rebinding of module attribute failed')
|
|
from test.test_import.data.circular_imports.subpkg import util
|
|
self.assertIs(util.util, rebinding.util)
|
|
|
|
def test_binding(self):
|
|
try:
|
|
import test.test_import.data.circular_imports.binding
|
|
except ImportError:
|
|
self.fail('circular import with binding a submodule to a name failed')
|
|
|
|
def test_crossreference1(self):
|
|
import test.test_import.data.circular_imports.use
|
|
import test.test_import.data.circular_imports.source
|
|
|
|
def test_crossreference2(self):
|
|
with self.assertRaises(AttributeError) as cm:
|
|
import test.test_import.data.circular_imports.source
|
|
errmsg = str(cm.exception)
|
|
self.assertIn('test.test_import.data.circular_imports.source', errmsg)
|
|
self.assertIn('spam', errmsg)
|
|
self.assertIn('partially initialized module', errmsg)
|
|
self.assertIn('circular import', errmsg)
|
|
|
|
def test_circular_from_import(self):
|
|
with self.assertRaises(ImportError) as cm:
|
|
import test.test_import.data.circular_imports.from_cycle1
|
|
self.assertIn(
|
|
"cannot import name 'b' from partially initialized module "
|
|
"'test.test_import.data.circular_imports.from_cycle1' "
|
|
"(most likely due to a circular import)",
|
|
str(cm.exception),
|
|
)
|
|
|
|
def test_unwritable_module(self):
|
|
self.addCleanup(unload, "test.test_import.data.unwritable")
|
|
self.addCleanup(unload, "test.test_import.data.unwritable.x")
|
|
|
|
import test.test_import.data.unwritable as unwritable
|
|
with self.assertWarns(ImportWarning):
|
|
from test.test_import.data.unwritable import x
|
|
|
|
self.assertNotEqual(type(unwritable), ModuleType)
|
|
self.assertEqual(type(x), ModuleType)
|
|
with self.assertRaises(AttributeError):
|
|
unwritable.x = 42
|
|
|
|
|
|
if __name__ == '__main__':
|
|
# Test needs to be a package, so we can do relative imports.
|
|
unittest.main()
|