Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 7dc38385ce78c5c04637531c4325a83b57fbeb3a authored by Larry Hastings on 09 August 2017, 07:08:33 UTC
Version bump for 3.4.7 final.
Version bump for 3.4.7 final.
Tip revision: 7dc3838
test_import.py
# We import importlib *ASAP* in order to test #15386
import importlib
import importlib.util
from importlib._bootstrap import _get_sourcefile
import builtins
import marshal
import os
import platform
import py_compile
import random
import stat
import sys
import unittest
import unittest.mock as mock
import textwrap
import errno
import shutil
import contextlib
import test.support
from test.support import (
EnvironmentVarGuard, TESTFN, check_warnings, forget, is_jython,
make_legacy_pyc, rmtree, run_unittest, swap_attr, swap_item, temp_umask,
unlink, unload, create_empty_file, cpython_only, TESTFN_UNENCODABLE)
from test import script_helper
skip_if_dont_write_bytecode = unittest.skipIf(
sys.dont_write_bytecode,
"test meaningful only when writing bytecode")
def remove_files(name):
for f in (name + ".py",
name + ".pyc",
name + ".pyo",
name + ".pyw",
name + "$py.class"):
unlink(f)
rmtree('__pycache__')
@contextlib.contextmanager
def _ready_to_import(name=None, source=""):
# sets up a temporary directory and removes it
# creates the module file
# temporarily clears the module from sys.modules (if any)
# reverts or removes the module when cleaning up
name = name or "spam"
with script_helper.temp_dir() as tempdir:
path = script_helper.make_script(tempdir, name, source)
old_module = sys.modules.pop(name, None)
try:
sys.path.insert(0, tempdir)
yield name, path
sys.path.remove(tempdir)
finally:
if old_module is not None:
sys.modules[name] = old_module
elif name in sys.modules:
del sys.modules[name]
class ImportTests(unittest.TestCase):
def setUp(self):
remove_files(TESTFN)
importlib.invalidate_caches()
def tearDown(self):
unload(TESTFN)
def test_case_sensitivity(self):
# Brief digression to test that import is case-sensitive: if we got
# this far, we know for sure that "random" exists.
with self.assertRaises(ImportError):
import RAnDoM
def test_double_const(self):
# Another brief digression to test the accuracy of manifest float
# constants.
from test import double_const # don't blink -- that *was* the test
def test_import(self):
def test_with_extension(ext):
# The extension is normally ".py", perhaps ".pyw".
source = TESTFN + ext
pyo = TESTFN + ".pyo"
if is_jython:
pyc = TESTFN + "$py.class"
else:
pyc = TESTFN + ".pyc"
with open(source, "w") 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)
unlink(pyo)
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') 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 (or .pyo).
# 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") 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_failing_reload(self):
# A failing reload should leave the module object in sys.modules.
source = TESTFN + os.extsep + "py"
with open(source, "w") 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") 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") 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.assertIn(ext, ('.pyc', '.pyo'))
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)
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') 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 != getattr(errno, 'EOVERFLOW', 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
@skip_if_dont_write_bytecode
class FilePermissionTests(unittest.TestCase):
# tests for file mode on cached .pyc/.pyo 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 "
"either a .pyc or .pyo 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 "
"either a .pyc or .pyo 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 "
"either a .pyc or .pyo 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()
if __debug__:
bytecode_only = path + "c"
else:
bytecode_only = path + "o"
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(12)
code = marshal.load(f)
constants = list(code.co_consts)
foreign_code = importlib.import_module.__code__
pos = constants.index(1)
constants[pos] = foreign_code
code = type(code)(code.co_argcount, code.co_kwonlyargcount,
code.co_nlocals, code.co_stacksize,
code.co_flags, code.co_code, tuple(constants),
code.co_names, code.co_varnames, code.co_filename,
code.co_name, code.co_firstlineno, code.co_lnotab,
code.co_freevars, code.co_cellvars)
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):
# 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(SystemError, check_relative)
# Check relative import fails with __package__ and __name__ wrong
ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule')
self.assertRaises(SystemError, check_relative)
# Check relative import fails with package set to a non-string
ns = dict(__package__=object())
self.assertRaises(TypeError, check_relative)
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")
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 related behaviors.
tag = sys.implementation.cache_tag
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__'))
self.assertTrue(os.path.exists(os.path.join(
'__pycache__', '{}.{}.py{}'.format(
TESTFN, self.tag, 'c' if __debug__ else 'o'))))
@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__'))
self.assertFalse(os.path.exists(os.path.join(
'__pycache__', '{}.{}.pyc'.format(TESTFN, self.tag))))
@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)
self.assertEqual(m.__file__,
os.path.join(os.curdir, os.path.relpath(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_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.FileFinder, mod.FileFinder)
@cpython_only
class GetSourcefileTests(unittest.TestCase):
"""Test importlib._bootstrap._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._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._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']
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)
if __name__ == '__main__':
# Test needs to be a package, so we can do relative imports.
unittest.main()
