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3132 lines (2686 loc) · 117 KB
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import builtins
import errno
import glob
import json
import importlib.util
from importlib._bootstrap_external import _get_sourcefile
from importlib.machinery import (
AppleFrameworkLoader,
BuiltinImporter,
ExtensionFileLoader,
FrozenImporter,
SourceFileLoader,
)
import marshal
import os
import py_compile
import random
import shutil
import stat
import subprocess
import sys
import textwrap
import threading
import time
import types
import unittest
from unittest import mock
import _imp
from test.support import os_helper
from test.support import (
STDLIB_DIR, swap_attr, swap_item, cpython_only, is_apple_mobile, is_emscripten,
is_wasi, run_in_subinterp, run_in_subinterp_with_config, Py_TRACE_REFS,
requires_gil_enabled, Py_GIL_DISABLED)
from test.support.import_helper import (
forget, make_legacy_pyc, unlink, unload, ready_to_import,
DirsOnSysPath, CleanImport, import_module)
from test.support.os_helper import (
TESTFN, rmtree, temp_umask, TESTFN_UNENCODABLE)
from test.support import script_helper
from test.support import threading_helper
from test.test_importlib.util import uncache
from types import ModuleType
try:
import _testsinglephase
except ImportError:
_testsinglephase = None
try:
import _testmultiphase
except ImportError:
_testmultiphase = None
try:
import _interpreters
except ModuleNotFoundError:
_interpreters = None
try:
import _testinternalcapi
except ImportError:
_testinternalcapi = None
skip_if_dont_write_bytecode = unittest.skipIf(
sys.dont_write_bytecode,
"test meaningful only when writing bytecode")
def _require_loader(module, loader, skip):
if isinstance(module, str):
module = __import__(module)
MODULE_KINDS = {
BuiltinImporter: 'built-in',
ExtensionFileLoader: 'extension',
AppleFrameworkLoader: 'framework extension',
FrozenImporter: 'frozen',
SourceFileLoader: 'pure Python',
}
expected = loader
assert isinstance(expected, type), expected
expected = MODULE_KINDS[expected]
actual = module.__spec__.loader
if not isinstance(actual, type):
actual = type(actual)
actual = MODULE_KINDS[actual]
if actual != expected:
err = f'expected module to be {expected}, got {module.__spec__}'
if skip:
raise unittest.SkipTest(err)
raise Exception(err)
return module
def require_builtin(module, *, skip=False):
module = _require_loader(module, BuiltinImporter, skip)
assert module.__spec__.origin == 'built-in', module.__spec__
def require_extension(module, *, skip=False):
# Apple extensions must be distributed as frameworks. This requires
# a specialist loader.
if is_apple_mobile:
_require_loader(module, AppleFrameworkLoader, skip)
else:
_require_loader(module, ExtensionFileLoader, skip)
def require_frozen(module, *, skip=True):
module = _require_loader(module, FrozenImporter, skip)
assert module.__spec__.origin == 'frozen', module.__spec__
def require_pure_python(module, *, skip=False):
_require_loader(module, SourceFileLoader, skip)
def remove_files(name):
for f in (name + ".py",
name + ".pyc",
name + ".pyw",
name + "$py.class"):
unlink(f)
rmtree('__pycache__')
def no_rerun(reason):
"""Skip rerunning for a particular test.
WARNING: Use this decorator with care; skipping rerunning makes it
impossible to find reference leaks. Provide a clear reason for skipping the
test using the 'reason' parameter.
"""
def deco(func):
_has_run = False
def wrapper(self):
nonlocal _has_run
if _has_run:
self.skipTest(reason)
func(self)
_has_run = True
return wrapper
return deco
if _testsinglephase is not None:
def restore__testsinglephase(*, _orig=_testsinglephase):
# We started with the module imported and want to restore
# it to its nominal state.
sys.modules.pop('_testsinglephase', None)
_orig._clear_globals()
origin = _orig.__spec__.origin
_testinternalcapi.clear_extension('_testsinglephase', origin)
import _testsinglephase
def requires_singlephase_init(meth):
"""Decorator to skip if single-phase init modules are not supported."""
if not isinstance(meth, type):
def meth(self, _meth=meth):
try:
return _meth(self)
finally:
restore__testsinglephase()
meth = cpython_only(meth)
msg = "gh-117694: free-threaded build does not currently support single-phase init modules in sub-interpreters"
meth = requires_gil_enabled(msg)(meth)
return unittest.skipIf(_testsinglephase is None,
'test requires _testsinglephase module')(meth)
def requires_subinterpreters(meth):
"""Decorator to skip a test if subinterpreters are not supported."""
return unittest.skipIf(_interpreters is None,
'subinterpreters required')(meth)
class ModuleSnapshot(types.SimpleNamespace):
"""A representation of a module for testing.
Fields:
* id - the module's object ID
* module - the actual module or an adequate substitute
* __file__
* __spec__
* name
* origin
* ns - a copy (dict) of the module's __dict__ (or None)
* ns_id - the object ID of the module's __dict__
* cached - the sys.modules[mod.__spec__.name] entry (or None)
* cached_id - the object ID of the sys.modules entry (or None)
In cases where the value is not available (e.g. due to serialization),
the value will be None.
"""
_fields = tuple('id module ns ns_id cached cached_id'.split())
@classmethod
def from_module(cls, mod):
name = mod.__spec__.name
cached = sys.modules.get(name)
return cls(
id=id(mod),
module=mod,
ns=types.SimpleNamespace(**mod.__dict__),
ns_id=id(mod.__dict__),
cached=cached,
cached_id=id(cached),
)
SCRIPT = textwrap.dedent('''
{imports}
name = {name!r}
{prescript}
mod = {name}
{body}
{postscript}
''')
IMPORTS = textwrap.dedent('''
import sys
''').strip()
SCRIPT_BODY = textwrap.dedent('''
# Capture the snapshot data.
cached = sys.modules.get(name)
snapshot = dict(
id=id(mod),
module=dict(
__file__=mod.__file__,
__spec__=dict(
name=mod.__spec__.name,
origin=mod.__spec__.origin,
),
),
ns=None,
ns_id=id(mod.__dict__),
cached=None,
cached_id=id(cached) if cached else None,
)
''').strip()
CLEANUP_SCRIPT = textwrap.dedent('''
# Clean up the module.
sys.modules.pop(name, None)
''').strip()
@classmethod
def build_script(cls, name, *,
prescript=None,
import_first=False,
postscript=None,
postcleanup=False,
):
if postcleanup is True:
postcleanup = cls.CLEANUP_SCRIPT
elif isinstance(postcleanup, str):
postcleanup = textwrap.dedent(postcleanup).strip()
postcleanup = cls.CLEANUP_SCRIPT + os.linesep + postcleanup
else:
postcleanup = ''
prescript = textwrap.dedent(prescript).strip() if prescript else ''
postscript = textwrap.dedent(postscript).strip() if postscript else ''
if postcleanup:
if postscript:
postscript = postscript + os.linesep * 2 + postcleanup
else:
postscript = postcleanup
if import_first:
prescript += textwrap.dedent(f'''
# Now import the module.
assert name not in sys.modules
import {name}''')
return cls.SCRIPT.format(
imports=cls.IMPORTS.strip(),
name=name,
prescript=prescript.strip(),
body=cls.SCRIPT_BODY.strip(),
postscript=postscript,
)
@classmethod
def parse(cls, text):
raw = json.loads(text)
mod = raw['module']
mod['__spec__'] = types.SimpleNamespace(**mod['__spec__'])
raw['module'] = types.SimpleNamespace(**mod)
return cls(**raw)
@classmethod
def from_subinterp(cls, name, interpid=None, *, pipe=None, **script_kwds):
if pipe is not None:
return cls._from_subinterp(name, interpid, pipe, script_kwds)
pipe = os.pipe()
try:
return cls._from_subinterp(name, interpid, pipe, script_kwds)
finally:
r, w = pipe
os.close(r)
os.close(w)
@classmethod
def _from_subinterp(cls, name, interpid, pipe, script_kwargs):
r, w = pipe
# Build the script.
postscript = textwrap.dedent(f'''
# Send the result over the pipe.
import json
import os
os.write({w}, json.dumps(snapshot).encode())
''')
_postscript = script_kwargs.get('postscript')
if _postscript:
_postscript = textwrap.dedent(_postscript).lstrip()
postscript += _postscript
script_kwargs['postscript'] = postscript.strip()
script = cls.build_script(name, **script_kwargs)
# Run the script.
if interpid is None:
ret = run_in_subinterp(script)
if ret != 0:
raise AssertionError(f'{ret} != 0')
else:
_interpreters.run_string(interpid, script)
# Parse the results.
text = os.read(r, 1000)
return cls.parse(text.decode())
class ImportTests(unittest.TestCase):
def setUp(self):
remove_files(TESTFN)
importlib.invalidate_caches()
def tearDown(self):
unload(TESTFN)
def test_import_raises_ModuleNotFoundError(self):
with self.assertRaises(ModuleNotFoundError):
import something_that_should_not_exist_anywhere
def test_from_import_missing_module_raises_ModuleNotFoundError(self):
with self.assertRaises(ModuleNotFoundError):
from something_that_should_not_exist_anywhere import blah
def test_from_import_missing_attr_raises_ImportError(self):
with self.assertRaises(ImportError):
from importlib import something_that_should_not_exist_anywhere
def test_from_import_missing_attr_has_name_and_path(self):
with CleanImport('os'):
import os
with self.assertRaises(ImportError) as cm:
from os import i_dont_exist
self.assertEqual(cm.exception.name, 'os')
self.assertEqual(cm.exception.path, os.__file__)
self.assertRegex(str(cm.exception), r"cannot import name 'i_dont_exist' from 'os' \(.*os.py\)")
@cpython_only
def test_from_import_missing_attr_has_name_and_so_path(self):
_testcapi = import_module("_testcapi")
with self.assertRaises(ImportError) as cm:
from _testcapi import i_dont_exist
self.assertEqual(cm.exception.name, '_testcapi')
if hasattr(_testcapi, "__file__"):
self.assertEqual(cm.exception.path, _testcapi.__file__)
self.assertRegex(
str(cm.exception),
r"cannot import name 'i_dont_exist' from '_testcapi' \(.*\.(so|fwork|pyd)\)"
)
else:
self.assertEqual(
str(cm.exception),
"cannot import name 'i_dont_exist' from '_testcapi' (unknown location)"
)
def test_from_import_missing_attr_has_name(self):
with self.assertRaises(ImportError) as cm:
# _warning has no path as it's a built-in module.
from _warning import i_dont_exist
self.assertEqual(cm.exception.name, '_warning')
self.assertIsNone(cm.exception.path)
def test_from_import_missing_attr_path_is_canonical(self):
with self.assertRaises(ImportError) as cm:
from os.path import i_dont_exist
self.assertIn(cm.exception.name, {'posixpath', 'ntpath'})
self.assertIsNotNone(cm.exception)
def test_from_import_star_invalid_type(self):
import re
with ready_to_import() as (name, path):
with open(path, 'w', encoding='utf-8') as f:
f.write("__all__ = [b'invalid_type']")
globals = {}
with self.assertRaisesRegex(
TypeError, f"{re.escape(name)}\\.__all__ must be str"
):
exec(f"from {name} import *", globals)
self.assertNotIn(b"invalid_type", globals)
with ready_to_import() as (name, path):
with open(path, 'w', encoding='utf-8') as f:
f.write("globals()[b'invalid_type'] = object()")
globals = {}
with self.assertRaisesRegex(
TypeError, f"{re.escape(name)}\\.__dict__ must be str"
):
exec(f"from {name} import *", globals)
self.assertNotIn(b"invalid_type", globals)
def test_case_sensitivity(self):
# Brief digression to test that import is case-sensitive: if we got
# this far, we know for sure that "random" exists.
with self.assertRaises(ImportError):
import RAnDoM
def test_double_const(self):
# Importing double_const checks that float constants
# serialiazed by marshal as PYC files don't lose precision
# (SF bug 422177).
from test.test_import.data import double_const
unload('test.test_import.data.double_const')
from test.test_import.data import double_const
def test_import(self):
def test_with_extension(ext):
# The extension is normally ".py", perhaps ".pyw".
source = TESTFN + ext
pyc = TESTFN + ".pyc"
with open(source, "w", encoding='utf-8') as f:
print("# This tests Python's ability to import a",
ext, "file.", file=f)
a = random.randrange(1000)
b = random.randrange(1000)
print("a =", a, file=f)
print("b =", b, file=f)
if TESTFN in sys.modules:
del sys.modules[TESTFN]
importlib.invalidate_caches()
try:
try:
mod = __import__(TESTFN)
except ImportError as err:
self.fail("import from %s failed: %s" % (ext, err))
self.assertEqual(mod.a, a,
"module loaded (%s) but contents invalid" % mod)
self.assertEqual(mod.b, b,
"module loaded (%s) but contents invalid" % mod)
finally:
forget(TESTFN)
unlink(source)
unlink(pyc)
sys.path.insert(0, os.curdir)
try:
test_with_extension(".py")
if sys.platform.startswith("win"):
for ext in [".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw"]:
test_with_extension(ext)
finally:
del sys.path[0]
def test_module_with_large_stack(self, module='longlist'):
# Regression test for http://bugs.python.org/issue561858.
filename = module + '.py'
# Create a file with a list of 65000 elements.
with open(filename, 'w', encoding='utf-8') as f:
f.write('d = [\n')
for i in range(65000):
f.write('"",\n')
f.write(']')
try:
# Compile & remove .py file; we only need .pyc.
# Bytecode must be relocated from the PEP 3147 bytecode-only location.
py_compile.compile(filename)
finally:
unlink(filename)
# Need to be able to load from current dir.
sys.path.append('')
importlib.invalidate_caches()
namespace = {}
try:
make_legacy_pyc(filename)
# This used to crash.
exec('import ' + module, None, namespace)
finally:
# Cleanup.
del sys.path[-1]
unlink(filename + 'c')
unlink(filename + 'o')
# Remove references to the module (unload the module)
namespace.clear()
try:
del sys.modules[module]
except KeyError:
pass
def test_failing_import_sticks(self):
source = TESTFN + ".py"
with open(source, "w", encoding='utf-8') as f:
print("a = 1/0", file=f)
# New in 2.4, we shouldn't be able to import that no matter how often
# we try.
sys.path.insert(0, os.curdir)
importlib.invalidate_caches()
if TESTFN in sys.modules:
del sys.modules[TESTFN]
try:
for i in [1, 2, 3]:
self.assertRaises(ZeroDivisionError, __import__, TESTFN)
self.assertNotIn(TESTFN, sys.modules,
"damaged module in sys.modules on %i try" % i)
finally:
del sys.path[0]
remove_files(TESTFN)
def test_import_name_binding(self):
# import x.y.z binds x in the current namespace
import test as x
import test.support
self.assertIs(x, test, x.__name__)
self.assertTrue(hasattr(test.support, "__file__"))
# import x.y.z as w binds z as w
import test.support as y
self.assertIs(y, test.support, y.__name__)
def test_issue31286(self):
# import in a 'finally' block resulted in SystemError
try:
x = ...
finally:
import test.support.script_helper as x
# import in a 'while' loop resulted in stack overflow
i = 0
while i < 10:
import test.support.script_helper as x
i += 1
# import in a 'for' loop resulted in segmentation fault
for i in range(2):
import test.support.script_helper as x
def test_failing_reload(self):
# A failing reload should leave the module object in sys.modules.
source = TESTFN + os.extsep + "py"
with open(source, "w", encoding='utf-8') as f:
f.write("a = 1\nb=2\n")
sys.path.insert(0, os.curdir)
try:
mod = __import__(TESTFN)
self.assertIn(TESTFN, sys.modules)
self.assertEqual(mod.a, 1, "module has wrong attribute values")
self.assertEqual(mod.b, 2, "module has wrong attribute values")
# On WinXP, just replacing the .py file wasn't enough to
# convince reload() to reparse it. Maybe the timestamp didn't
# move enough. We force it to get reparsed by removing the
# compiled file too.
remove_files(TESTFN)
# Now damage the module.
with open(source, "w", encoding='utf-8') as f:
f.write("a = 10\nb=20//0\n")
self.assertRaises(ZeroDivisionError, importlib.reload, mod)
# But we still expect the module to be in sys.modules.
mod = sys.modules.get(TESTFN)
self.assertIsNotNone(mod, "expected module to be in sys.modules")
# We should have replaced a w/ 10, but the old b value should
# stick.
self.assertEqual(mod.a, 10, "module has wrong attribute values")
self.assertEqual(mod.b, 2, "module has wrong attribute values")
finally:
del sys.path[0]
remove_files(TESTFN)
unload(TESTFN)
@skip_if_dont_write_bytecode
def test_file_to_source(self):
# check if __file__ points to the source file where available
source = TESTFN + ".py"
with open(source, "w", encoding='utf-8') as f:
f.write("test = None\n")
sys.path.insert(0, os.curdir)
try:
mod = __import__(TESTFN)
self.assertTrue(mod.__file__.endswith('.py'))
os.remove(source)
del sys.modules[TESTFN]
make_legacy_pyc(source)
importlib.invalidate_caches()
mod = __import__(TESTFN)
base, ext = os.path.splitext(mod.__file__)
self.assertEqual(ext, '.pyc')
finally:
del sys.path[0]
remove_files(TESTFN)
if TESTFN in sys.modules:
del sys.modules[TESTFN]
def test_import_by_filename(self):
path = os.path.abspath(TESTFN)
encoding = sys.getfilesystemencoding()
try:
path.encode(encoding)
except UnicodeEncodeError:
self.skipTest('path is not encodable to {}'.format(encoding))
with self.assertRaises(ImportError) as c:
__import__(path)
def test_import_in_del_does_not_crash(self):
# Issue 4236
testfn = script_helper.make_script('', TESTFN, textwrap.dedent("""\
import sys
class C:
def __del__(self):
import importlib
sys.argv.insert(0, C())
"""))
script_helper.assert_python_ok(testfn)
@skip_if_dont_write_bytecode
def test_timestamp_overflow(self):
# A modification timestamp larger than 2**32 should not be a problem
# when importing a module (issue #11235).
sys.path.insert(0, os.curdir)
try:
source = TESTFN + ".py"
compiled = importlib.util.cache_from_source(source)
with open(source, 'w', encoding='utf-8') as f:
pass
try:
os.utime(source, (2 ** 33 - 5, 2 ** 33 - 5))
except OverflowError:
self.skipTest("cannot set modification time to large integer")
except OSError as e:
if e.errno not in (getattr(errno, 'EOVERFLOW', None),
getattr(errno, 'EINVAL', None)):
raise
self.skipTest("cannot set modification time to large integer ({})".format(e))
__import__(TESTFN)
# The pyc file was created.
os.stat(compiled)
finally:
del sys.path[0]
remove_files(TESTFN)
def test_bogus_fromlist(self):
try:
__import__('http', fromlist=['blah'])
except ImportError:
self.fail("fromlist must allow bogus names")
@cpython_only
def test_delete_builtins_import(self):
args = ["-c", "del __builtins__.__import__; import os"]
popen = script_helper.spawn_python(*args)
stdout, stderr = popen.communicate()
self.assertIn(b"ImportError", stdout)
def test_from_import_message_for_nonexistent_module(self):
with self.assertRaisesRegex(ImportError, "^No module named 'bogus'"):
from bogus import foo
def test_from_import_message_for_existing_module(self):
with self.assertRaisesRegex(ImportError, "^cannot import name 'bogus'"):
from re import bogus
def test_from_import_AttributeError(self):
# Issue #24492: trying to import an attribute that raises an
# AttributeError should lead to an ImportError.
class AlwaysAttributeError:
def __getattr__(self, _):
raise AttributeError
module_name = 'test_from_import_AttributeError'
self.addCleanup(unload, module_name)
sys.modules[module_name] = AlwaysAttributeError()
with self.assertRaises(ImportError) as cm:
from test_from_import_AttributeError import does_not_exist
self.assertEqual(str(cm.exception),
"cannot import name 'does_not_exist' from '<unknown module name>' (unknown location)")
@cpython_only
def test_issue31492(self):
# There shouldn't be an assertion failure in case of failing to import
# from a module with a bad __name__ attribute, or in case of failing
# to access an attribute of such a module.
with swap_attr(os, '__name__', None):
with self.assertRaises(ImportError):
from os import does_not_exist
with self.assertRaises(AttributeError):
os.does_not_exist
@threading_helper.requires_working_threading()
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':
time.sleep(0.1)
sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'data'))
try:
exc = None
def run():
sys.settrace(delay_has_deadlock)
event.wait()
try:
import package
except BaseException as e:
nonlocal exc
exc = e
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:
sys.modules.pop('package', None)
sys.modules.pop('package.submodule', None)
if exc is not None:
raise exc
finally:
del sys.path[0]
@unittest.skipUnless(sys.platform == "win32", "Windows-specific")
def test_dll_dependency_import(self):
from _winapi import GetModuleFileName
dllname = GetModuleFileName(sys.dllhandle)
pydname = importlib.util.find_spec("_sqlite3").origin
depname = os.path.join(
os.path.dirname(pydname),
"sqlite3{}.dll".format("_d" if "_d" in pydname else ""))
with os_helper.temp_dir() as tmp:
tmp2 = os.path.join(tmp, "DLLs")
os.mkdir(tmp2)
pyexe = os.path.join(tmp, os.path.basename(sys.executable))
shutil.copy(sys.executable, pyexe)
shutil.copy(dllname, tmp)
for f in glob.glob(os.path.join(glob.escape(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 + ";" + STDLIB_DIR
# 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))
def test_issue105979(self):
# this used to crash
with self.assertRaises(ImportError) as cm:
_imp.get_frozen_object("x", b"6\'\xd5Cu\x12")
self.assertIn("Frozen object named 'x' is invalid",
str(cm.exception))
def test_script_shadowing_stdlib(self):
with os_helper.temp_dir() as tmp:
with open(os.path.join(tmp, "fractions.py"), "w", encoding='utf-8') as f:
f.write("import fractions\nfractions.Fraction")
expected_error = (
rb"AttributeError: module 'fractions' has no attribute 'Fraction' "
rb"\(consider renaming '.*fractions.py' since it has the "
rb"same name as the standard library module named 'fractions' "
rb"and the import system gives it precedence\)"
)
popen = script_helper.spawn_python(os.path.join(tmp, "fractions.py"), cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
popen = script_helper.spawn_python('-m', 'fractions', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
popen = script_helper.spawn_python('-c', 'import fractions', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
# and there's no error at all when using -P
popen = script_helper.spawn_python('-P', 'fractions.py', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertEqual(stdout, b'')
tmp_child = os.path.join(tmp, "child")
os.mkdir(tmp_child)
# test the logic with different cwd
popen = script_helper.spawn_python(os.path.join(tmp, "fractions.py"), cwd=tmp_child)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
popen = script_helper.spawn_python('-m', 'fractions', cwd=tmp_child)
stdout, stderr = popen.communicate()
self.assertEqual(stdout, b'') # no error
popen = script_helper.spawn_python('-c', 'import fractions', cwd=tmp_child)
stdout, stderr = popen.communicate()
self.assertEqual(stdout, b'') # no error
def test_package_shadowing_stdlib_module(self):
with os_helper.temp_dir() as tmp:
os.mkdir(os.path.join(tmp, "fractions"))
with open(os.path.join(tmp, "fractions", "__init__.py"), "w", encoding='utf-8') as f:
f.write("shadowing_module = True")
with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f:
f.write("""
import fractions
fractions.shadowing_module
fractions.Fraction
""")
expected_error = (
rb"AttributeError: module 'fractions' has no attribute 'Fraction' "
rb"\(consider renaming '.*fractions.__init__.py' since it has the "
rb"same name as the standard library module named 'fractions' "
rb"and the import system gives it precedence\)"
)
popen = script_helper.spawn_python(os.path.join(tmp, "main.py"), cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
popen = script_helper.spawn_python('-m', 'main', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
# and there's no shadowing at all when using -P
popen = script_helper.spawn_python('-P', 'main.py', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, b"module 'fractions' has no attribute 'shadowing_module'")
def test_script_shadowing_third_party(self):
with os_helper.temp_dir() as tmp:
with open(os.path.join(tmp, "numpy.py"), "w", encoding='utf-8') as f:
f.write("import numpy\nnumpy.array")
expected_error = (
rb"AttributeError: module 'numpy' has no attribute 'array' "
rb"\(consider renaming '.*numpy.py' if it has the "
rb"same name as a third-party module you intended to import\)\s+\Z"
)
popen = script_helper.spawn_python(os.path.join(tmp, "numpy.py"))
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
popen = script_helper.spawn_python('-m', 'numpy', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
popen = script_helper.spawn_python('-c', 'import numpy', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
def test_script_maybe_not_shadowing_third_party(self):
with os_helper.temp_dir() as tmp:
with open(os.path.join(tmp, "numpy.py"), "w", encoding='utf-8') as f:
f.write("this_script_does_not_attempt_to_import_numpy = True")
expected_error = (
rb"AttributeError: module 'numpy' has no attribute 'attr'\s+\Z"
)
popen = script_helper.spawn_python('-c', 'import numpy; numpy.attr', cwd=tmp)
stdout, stderr = popen.communicate()
self.assertRegex(stdout, expected_error)
def test_script_shadowing_stdlib_edge_cases(self):
with os_helper.temp_dir() as tmp:
with open(os.path.join(tmp, "fractions.py"), "w", encoding='utf-8') as f:
f.write("shadowing_module = True")
with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f:
f.write("""
import fractions
fractions.shadowing_module
class substr(str):
__hash__ = None
fractions.__name__ = substr('fractions')
try:
fractions.Fraction
except TypeError as e:
print(str(e))
""")
popen = script_helper.spawn_python("main.py", cwd=tmp)
stdout, stderr = popen.communicate()
self.assertEqual(stdout.rstrip(), b"unhashable type: 'substr'")
with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f:
f.write("""
import fractions
fractions.shadowing_module
import sys
sys.stdlib_module_names = None
try:
fractions.Fraction
except AttributeError as e:
print(str(e))
del sys.stdlib_module_names
try:
fractions.Fraction
except AttributeError as e:
print(str(e))
sys.path = [0]
try:
fractions.Fraction
except AttributeError as e:
print(str(e))
""")
popen = script_helper.spawn_python("main.py", cwd=tmp)
stdout, stderr = popen.communicate()
self.assertEqual(
stdout.splitlines(),
[
b"module 'fractions' has no attribute 'Fraction'",
b"module 'fractions' has no attribute 'Fraction'",
b"module 'fractions' has no attribute 'Fraction'",
],
)
with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f:
f.write("""
import fractions
fractions.shadowing_module
del fractions.__spec__.origin
try:
fractions.Fraction
except AttributeError as e:
print(str(e))
fractions.__spec__.origin = 0
try:
fractions.Fraction
except AttributeError as e:
print(str(e))
""")
popen = script_helper.spawn_python("main.py", cwd=tmp)
stdout, stderr = popen.communicate()
self.assertEqual(
stdout.splitlines(),
[
b"module 'fractions' has no attribute 'Fraction'",
b"module 'fractions' has no attribute 'Fraction'"