mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
484 lines
20 KiB
Python
484 lines
20 KiB
Python
from importlib import machinery
|
|
import importlib
|
|
import importlib.abc
|
|
from .. import abc
|
|
from .. import util
|
|
from . import util as source_util
|
|
|
|
import errno
|
|
import imp
|
|
import marshal
|
|
import os
|
|
import py_compile
|
|
import shutil
|
|
import stat
|
|
import sys
|
|
import unittest
|
|
|
|
from test.support import make_legacy_pyc
|
|
|
|
|
|
class SimpleTest(unittest.TestCase):
|
|
|
|
"""Should have no issue importing a source module [basic]. And if there is
|
|
a syntax error, it should raise a SyntaxError [syntax error].
|
|
|
|
"""
|
|
|
|
def test_load_module_API(self):
|
|
# If fullname is not specified that assume self.name is desired.
|
|
class TesterMixin(importlib.abc.Loader):
|
|
def load_module(self, fullname): return fullname
|
|
def module_repr(self, module): return '<module>'
|
|
|
|
class Tester(importlib.abc.FileLoader, TesterMixin):
|
|
def get_code(self, _): pass
|
|
def get_source(self, _): pass
|
|
def is_package(self, _): pass
|
|
|
|
name = 'mod_name'
|
|
loader = Tester(name, 'some_path')
|
|
self.assertEqual(name, loader.load_module())
|
|
self.assertEqual(name, loader.load_module(None))
|
|
self.assertEqual(name, loader.load_module(name))
|
|
with self.assertRaises(ImportError):
|
|
loader.load_module(loader.name + 'XXX')
|
|
|
|
def test_get_filename_API(self):
|
|
# If fullname is not set then assume self.path is desired.
|
|
class Tester(importlib.abc.FileLoader):
|
|
def get_code(self, _): pass
|
|
def get_source(self, _): pass
|
|
def is_package(self, _): pass
|
|
def module_repr(self, _): pass
|
|
|
|
path = 'some_path'
|
|
name = 'some_name'
|
|
loader = Tester(name, path)
|
|
self.assertEqual(path, loader.get_filename(name))
|
|
self.assertEqual(path, loader.get_filename())
|
|
self.assertEqual(path, loader.get_filename(None))
|
|
with self.assertRaises(ImportError):
|
|
loader.get_filename(name + 'XXX')
|
|
|
|
# [basic]
|
|
def test_module(self):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
loader = machinery.SourceFileLoader('_temp', mapping['_temp'])
|
|
module = loader.load_module('_temp')
|
|
self.assertIn('_temp', sys.modules)
|
|
check = {'__name__': '_temp', '__file__': mapping['_temp'],
|
|
'__package__': ''}
|
|
for attr, value in check.items():
|
|
self.assertEqual(getattr(module, attr), value)
|
|
|
|
def test_package(self):
|
|
with source_util.create_modules('_pkg.__init__') as mapping:
|
|
loader = machinery.SourceFileLoader('_pkg',
|
|
mapping['_pkg.__init__'])
|
|
module = loader.load_module('_pkg')
|
|
self.assertIn('_pkg', sys.modules)
|
|
check = {'__name__': '_pkg', '__file__': mapping['_pkg.__init__'],
|
|
'__path__': [os.path.dirname(mapping['_pkg.__init__'])],
|
|
'__package__': '_pkg'}
|
|
for attr, value in check.items():
|
|
self.assertEqual(getattr(module, attr), value)
|
|
|
|
|
|
def test_lacking_parent(self):
|
|
with source_util.create_modules('_pkg.__init__', '_pkg.mod')as mapping:
|
|
loader = machinery.SourceFileLoader('_pkg.mod',
|
|
mapping['_pkg.mod'])
|
|
module = loader.load_module('_pkg.mod')
|
|
self.assertIn('_pkg.mod', sys.modules)
|
|
check = {'__name__': '_pkg.mod', '__file__': mapping['_pkg.mod'],
|
|
'__package__': '_pkg'}
|
|
for attr, value in check.items():
|
|
self.assertEqual(getattr(module, attr), value)
|
|
|
|
def fake_mtime(self, fxn):
|
|
"""Fake mtime to always be higher than expected."""
|
|
return lambda name: fxn(name) + 1
|
|
|
|
def test_module_reuse(self):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
loader = machinery.SourceFileLoader('_temp', mapping['_temp'])
|
|
module = loader.load_module('_temp')
|
|
module_id = id(module)
|
|
module_dict_id = id(module.__dict__)
|
|
with open(mapping['_temp'], 'w') as file:
|
|
file.write("testing_var = 42\n")
|
|
module = loader.load_module('_temp')
|
|
self.assertIn('testing_var', module.__dict__,
|
|
"'testing_var' not in "
|
|
"{0}".format(list(module.__dict__.keys())))
|
|
self.assertEqual(module, sys.modules['_temp'])
|
|
self.assertEqual(id(module), module_id)
|
|
self.assertEqual(id(module.__dict__), module_dict_id)
|
|
|
|
def test_state_after_failure(self):
|
|
# A failed reload should leave the original module intact.
|
|
attributes = ('__file__', '__path__', '__package__')
|
|
value = '<test>'
|
|
name = '_temp'
|
|
with source_util.create_modules(name) as mapping:
|
|
orig_module = imp.new_module(name)
|
|
for attr in attributes:
|
|
setattr(orig_module, attr, value)
|
|
with open(mapping[name], 'w') as file:
|
|
file.write('+++ bad syntax +++')
|
|
loader = machinery.SourceFileLoader('_temp', mapping['_temp'])
|
|
with self.assertRaises(SyntaxError):
|
|
loader.load_module(name)
|
|
for attr in attributes:
|
|
self.assertEqual(getattr(orig_module, attr), value)
|
|
|
|
# [syntax error]
|
|
def test_bad_syntax(self):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
with open(mapping['_temp'], 'w') as file:
|
|
file.write('=')
|
|
loader = machinery.SourceFileLoader('_temp', mapping['_temp'])
|
|
with self.assertRaises(SyntaxError):
|
|
loader.load_module('_temp')
|
|
self.assertNotIn('_temp', sys.modules)
|
|
|
|
def test_file_from_empty_string_dir(self):
|
|
# Loading a module found from an empty string entry on sys.path should
|
|
# not only work, but keep all attributes relative.
|
|
file_path = '_temp.py'
|
|
with open(file_path, 'w') as file:
|
|
file.write("# test file for importlib")
|
|
try:
|
|
with util.uncache('_temp'):
|
|
loader = machinery.SourceFileLoader('_temp', file_path)
|
|
mod = loader.load_module('_temp')
|
|
self.assertEqual(file_path, mod.__file__)
|
|
self.assertEqual(imp.cache_from_source(file_path),
|
|
mod.__cached__)
|
|
finally:
|
|
os.unlink(file_path)
|
|
pycache = os.path.dirname(imp.cache_from_source(file_path))
|
|
shutil.rmtree(pycache)
|
|
|
|
def test_timestamp_overflow(self):
|
|
# When a modification timestamp is larger than 2**32, it should be
|
|
# truncated rather than raise an OverflowError.
|
|
with source_util.create_modules('_temp') as mapping:
|
|
source = mapping['_temp']
|
|
compiled = imp.cache_from_source(source)
|
|
with open(source, 'w') as f:
|
|
f.write("x = 5")
|
|
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))
|
|
loader = machinery.SourceFileLoader('_temp', mapping['_temp'])
|
|
mod = loader.load_module('_temp')
|
|
# Sanity checks.
|
|
self.assertEqual(mod.__cached__, compiled)
|
|
self.assertEqual(mod.x, 5)
|
|
# The pyc file was created.
|
|
os.stat(compiled)
|
|
|
|
|
|
class BadBytecodeTest(unittest.TestCase):
|
|
|
|
def import_(self, file, module_name):
|
|
loader = self.loader(module_name, file)
|
|
module = loader.load_module(module_name)
|
|
self.assertIn(module_name, sys.modules)
|
|
|
|
def manipulate_bytecode(self, name, mapping, manipulator, *,
|
|
del_source=False):
|
|
"""Manipulate the bytecode of a module by passing it into a callable
|
|
that returns what to use as the new bytecode."""
|
|
try:
|
|
del sys.modules['_temp']
|
|
except KeyError:
|
|
pass
|
|
py_compile.compile(mapping[name])
|
|
if not del_source:
|
|
bytecode_path = imp.cache_from_source(mapping[name])
|
|
else:
|
|
os.unlink(mapping[name])
|
|
bytecode_path = make_legacy_pyc(mapping[name])
|
|
if manipulator:
|
|
with open(bytecode_path, 'rb') as file:
|
|
bc = file.read()
|
|
new_bc = manipulator(bc)
|
|
with open(bytecode_path, 'wb') as file:
|
|
if new_bc is not None:
|
|
file.write(new_bc)
|
|
return bytecode_path
|
|
|
|
def _test_empty_file(self, test, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bc_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: b'',
|
|
del_source=del_source)
|
|
test('_temp', mapping, bc_path)
|
|
|
|
@source_util.writes_bytecode_files
|
|
def _test_partial_magic(self, test, *, del_source=False):
|
|
# When their are less than 4 bytes to a .pyc, regenerate it if
|
|
# possible, else raise ImportError.
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bc_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: bc[:3],
|
|
del_source=del_source)
|
|
test('_temp', mapping, bc_path)
|
|
|
|
def _test_magic_only(self, test, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bc_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: bc[:4],
|
|
del_source=del_source)
|
|
test('_temp', mapping, bc_path)
|
|
|
|
def _test_partial_timestamp(self, test, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bc_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: bc[:7],
|
|
del_source=del_source)
|
|
test('_temp', mapping, bc_path)
|
|
|
|
def _test_partial_size(self, test, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bc_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: bc[:11],
|
|
del_source=del_source)
|
|
test('_temp', mapping, bc_path)
|
|
|
|
def _test_no_marshal(self, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bc_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: bc[:12],
|
|
del_source=del_source)
|
|
file_path = mapping['_temp'] if not del_source else bc_path
|
|
with self.assertRaises(EOFError):
|
|
self.import_(file_path, '_temp')
|
|
|
|
def _test_non_code_marshal(self, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bytecode_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: bc[:12] + marshal.dumps(b'abcd'),
|
|
del_source=del_source)
|
|
file_path = mapping['_temp'] if not del_source else bytecode_path
|
|
with self.assertRaises(ImportError) as cm:
|
|
self.import_(file_path, '_temp')
|
|
self.assertEqual(cm.exception.name, '_temp')
|
|
self.assertEqual(cm.exception.path, bytecode_path)
|
|
|
|
def _test_bad_marshal(self, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bytecode_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: bc[:12] + b'<test>',
|
|
del_source=del_source)
|
|
file_path = mapping['_temp'] if not del_source else bytecode_path
|
|
with self.assertRaises(EOFError):
|
|
self.import_(file_path, '_temp')
|
|
|
|
def _test_bad_magic(self, test, *, del_source=False):
|
|
with source_util.create_modules('_temp') as mapping:
|
|
bc_path = self.manipulate_bytecode('_temp', mapping,
|
|
lambda bc: b'\x00\x00\x00\x00' + bc[4:])
|
|
test('_temp', mapping, bc_path)
|
|
|
|
|
|
class SourceLoaderBadBytecodeTest(BadBytecodeTest):
|
|
|
|
loader = machinery.SourceFileLoader
|
|
|
|
@source_util.writes_bytecode_files
|
|
def test_empty_file(self):
|
|
# When a .pyc is empty, regenerate it if possible, else raise
|
|
# ImportError.
|
|
def test(name, mapping, bytecode_path):
|
|
self.import_(mapping[name], name)
|
|
with open(bytecode_path, 'rb') as file:
|
|
self.assertGreater(len(file.read()), 12)
|
|
|
|
self._test_empty_file(test)
|
|
|
|
def test_partial_magic(self):
|
|
def test(name, mapping, bytecode_path):
|
|
self.import_(mapping[name], name)
|
|
with open(bytecode_path, 'rb') as file:
|
|
self.assertGreater(len(file.read()), 12)
|
|
|
|
self._test_partial_magic(test)
|
|
|
|
@source_util.writes_bytecode_files
|
|
def test_magic_only(self):
|
|
# When there is only the magic number, regenerate the .pyc if possible,
|
|
# else raise EOFError.
|
|
def test(name, mapping, bytecode_path):
|
|
self.import_(mapping[name], name)
|
|
with open(bytecode_path, 'rb') as file:
|
|
self.assertGreater(len(file.read()), 12)
|
|
|
|
self._test_magic_only(test)
|
|
|
|
@source_util.writes_bytecode_files
|
|
def test_bad_magic(self):
|
|
# When the magic number is different, the bytecode should be
|
|
# regenerated.
|
|
def test(name, mapping, bytecode_path):
|
|
self.import_(mapping[name], name)
|
|
with open(bytecode_path, 'rb') as bytecode_file:
|
|
self.assertEqual(bytecode_file.read(4), imp.get_magic())
|
|
|
|
self._test_bad_magic(test)
|
|
|
|
@source_util.writes_bytecode_files
|
|
def test_partial_timestamp(self):
|
|
# When the timestamp is partial, regenerate the .pyc, else
|
|
# raise EOFError.
|
|
def test(name, mapping, bc_path):
|
|
self.import_(mapping[name], name)
|
|
with open(bc_path, 'rb') as file:
|
|
self.assertGreater(len(file.read()), 12)
|
|
|
|
self._test_partial_timestamp(test)
|
|
|
|
@source_util.writes_bytecode_files
|
|
def test_partial_size(self):
|
|
# When the size is partial, regenerate the .pyc, else
|
|
# raise EOFError.
|
|
def test(name, mapping, bc_path):
|
|
self.import_(mapping[name], name)
|
|
with open(bc_path, 'rb') as file:
|
|
self.assertGreater(len(file.read()), 12)
|
|
|
|
self._test_partial_size(test)
|
|
|
|
@source_util.writes_bytecode_files
|
|
def test_no_marshal(self):
|
|
# When there is only the magic number and timestamp, raise EOFError.
|
|
self._test_no_marshal()
|
|
|
|
@source_util.writes_bytecode_files
|
|
def test_non_code_marshal(self):
|
|
self._test_non_code_marshal()
|
|
# XXX ImportError when sourceless
|
|
|
|
# [bad marshal]
|
|
@source_util.writes_bytecode_files
|
|
def test_bad_marshal(self):
|
|
# Bad marshal data should raise a ValueError.
|
|
self._test_bad_marshal()
|
|
|
|
# [bad timestamp]
|
|
@source_util.writes_bytecode_files
|
|
def test_old_timestamp(self):
|
|
# When the timestamp is older than the source, bytecode should be
|
|
# regenerated.
|
|
zeros = b'\x00\x00\x00\x00'
|
|
with source_util.create_modules('_temp') as mapping:
|
|
py_compile.compile(mapping['_temp'])
|
|
bytecode_path = imp.cache_from_source(mapping['_temp'])
|
|
with open(bytecode_path, 'r+b') as bytecode_file:
|
|
bytecode_file.seek(4)
|
|
bytecode_file.write(zeros)
|
|
self.import_(mapping['_temp'], '_temp')
|
|
source_mtime = os.path.getmtime(mapping['_temp'])
|
|
source_timestamp = importlib._w_long(source_mtime)
|
|
with open(bytecode_path, 'rb') as bytecode_file:
|
|
bytecode_file.seek(4)
|
|
self.assertEqual(bytecode_file.read(4), source_timestamp)
|
|
|
|
# [bytecode read-only]
|
|
@source_util.writes_bytecode_files
|
|
def test_read_only_bytecode(self):
|
|
# When bytecode is read-only but should be rewritten, fail silently.
|
|
with source_util.create_modules('_temp') as mapping:
|
|
# Create bytecode that will need to be re-created.
|
|
py_compile.compile(mapping['_temp'])
|
|
bytecode_path = imp.cache_from_source(mapping['_temp'])
|
|
with open(bytecode_path, 'r+b') as bytecode_file:
|
|
bytecode_file.seek(0)
|
|
bytecode_file.write(b'\x00\x00\x00\x00')
|
|
# Make the bytecode read-only.
|
|
os.chmod(bytecode_path,
|
|
stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
|
|
try:
|
|
# Should not raise IOError!
|
|
self.import_(mapping['_temp'], '_temp')
|
|
finally:
|
|
# Make writable for eventual clean-up.
|
|
os.chmod(bytecode_path, stat.S_IWUSR)
|
|
|
|
|
|
class SourcelessLoaderBadBytecodeTest(BadBytecodeTest):
|
|
|
|
loader = machinery.SourcelessFileLoader
|
|
|
|
def test_empty_file(self):
|
|
def test(name, mapping, bytecode_path):
|
|
with self.assertRaises(ImportError) as cm:
|
|
self.import_(bytecode_path, name)
|
|
self.assertEqual(cm.exception.name, name)
|
|
self.assertEqual(cm.exception.path, bytecode_path)
|
|
|
|
self._test_empty_file(test, del_source=True)
|
|
|
|
def test_partial_magic(self):
|
|
def test(name, mapping, bytecode_path):
|
|
with self.assertRaises(ImportError) as cm:
|
|
self.import_(bytecode_path, name)
|
|
self.assertEqual(cm.exception.name, name)
|
|
self.assertEqual(cm.exception.path, bytecode_path)
|
|
self._test_partial_magic(test, del_source=True)
|
|
|
|
def test_magic_only(self):
|
|
def test(name, mapping, bytecode_path):
|
|
with self.assertRaises(EOFError):
|
|
self.import_(bytecode_path, name)
|
|
|
|
self._test_magic_only(test, del_source=True)
|
|
|
|
def test_bad_magic(self):
|
|
def test(name, mapping, bytecode_path):
|
|
with self.assertRaises(ImportError) as cm:
|
|
self.import_(bytecode_path, name)
|
|
self.assertEqual(cm.exception.name, name)
|
|
self.assertEqual(cm.exception.path, bytecode_path)
|
|
|
|
self._test_bad_magic(test, del_source=True)
|
|
|
|
def test_partial_timestamp(self):
|
|
def test(name, mapping, bytecode_path):
|
|
with self.assertRaises(EOFError):
|
|
self.import_(bytecode_path, name)
|
|
|
|
self._test_partial_timestamp(test, del_source=True)
|
|
|
|
def test_partial_size(self):
|
|
def test(name, mapping, bytecode_path):
|
|
with self.assertRaises(EOFError):
|
|
self.import_(bytecode_path, name)
|
|
|
|
self._test_partial_size(test, del_source=True)
|
|
|
|
def test_no_marshal(self):
|
|
self._test_no_marshal(del_source=True)
|
|
|
|
def test_non_code_marshal(self):
|
|
self._test_non_code_marshal(del_source=True)
|
|
|
|
|
|
def test_main():
|
|
from test.support import run_unittest
|
|
run_unittest(SimpleTest,
|
|
SourceLoaderBadBytecodeTest,
|
|
SourcelessLoaderBadBytecodeTest
|
|
)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|