import functools import importlib.util import os import py_compile import shutil import stat import sys import tempfile import unittest from test import support def without_source_date_epoch(fxn): """Runs function with SOURCE_DATE_EPOCH unset.""" @functools.wraps(fxn) def wrapper(*args, **kwargs): with support.EnvironmentVarGuard() as env: env.unset('SOURCE_DATE_EPOCH') return fxn(*args, **kwargs) return wrapper def with_source_date_epoch(fxn): """Runs function with SOURCE_DATE_EPOCH set.""" @functools.wraps(fxn) def wrapper(*args, **kwargs): with support.EnvironmentVarGuard() as env: env['SOURCE_DATE_EPOCH'] = '123456789' return fxn(*args, **kwargs) return wrapper # Run tests with SOURCE_DATE_EPOCH set or unset explicitly. class SourceDateEpochTestMeta(type(unittest.TestCase)): def __new__(mcls, name, bases, dct, *, source_date_epoch): cls = super().__new__(mcls, name, bases, dct) for attr in dir(cls): if attr.startswith('test_'): meth = getattr(cls, attr) if source_date_epoch: wrapper = with_source_date_epoch(meth) else: wrapper = without_source_date_epoch(meth) setattr(cls, attr, wrapper) return cls class PyCompileTestsBase: def setUp(self): self.directory = tempfile.mkdtemp() self.source_path = os.path.join(self.directory, '_test.py') self.pyc_path = self.source_path + 'c' self.cache_path = importlib.util.cache_from_source(self.source_path) self.cwd_drive = os.path.splitdrive(os.getcwd())[0] # In these tests we compute relative paths. When using Windows, the # current working directory path and the 'self.source_path' might be # on different drives. Therefore we need to switch to the drive where # the temporary source file lives. drive = os.path.splitdrive(self.source_path)[0] if drive: os.chdir(drive) with open(self.source_path, 'w') as file: file.write('x = 123\n') def tearDown(self): shutil.rmtree(self.directory) if self.cwd_drive: os.chdir(self.cwd_drive) def test_absolute_path(self): py_compile.compile(self.source_path, self.pyc_path) self.assertTrue(os.path.exists(self.pyc_path)) self.assertFalse(os.path.exists(self.cache_path)) def test_do_not_overwrite_symlinks(self): # In the face of a cfile argument being a symlink, bail out. # Issue #17222 try: os.symlink(self.pyc_path + '.actual', self.pyc_path) except (NotImplementedError, OSError): self.skipTest('need to be able to create a symlink for a file') else: assert os.path.islink(self.pyc_path) with self.assertRaises(FileExistsError): py_compile.compile(self.source_path, self.pyc_path) @unittest.skipIf(not os.path.exists(os.devnull) or os.path.isfile(os.devnull), 'requires os.devnull and for it to be a non-regular file') def test_do_not_overwrite_nonregular_files(self): # In the face of a cfile argument being a non-regular file, bail out. # Issue #17222 with self.assertRaises(FileExistsError): py_compile.compile(self.source_path, os.devnull) def test_cache_path(self): py_compile.compile(self.source_path) self.assertTrue(os.path.exists(self.cache_path)) def test_cwd(self): with support.change_cwd(self.directory): py_compile.compile(os.path.basename(self.source_path), os.path.basename(self.pyc_path)) self.assertTrue(os.path.exists(self.pyc_path)) self.assertFalse(os.path.exists(self.cache_path)) def test_relative_path(self): py_compile.compile(os.path.relpath(self.source_path), os.path.relpath(self.pyc_path)) self.assertTrue(os.path.exists(self.pyc_path)) self.assertFalse(os.path.exists(self.cache_path)) @unittest.skipIf(hasattr(os, 'geteuid') and os.geteuid() == 0, 'non-root user required') @unittest.skipIf(os.name == 'nt', 'cannot control directory permissions on Windows') def test_exceptions_propagate(self): # Make sure that exceptions raised thanks to issues with writing # bytecode. # http://bugs.python.org/issue17244 mode = os.stat(self.directory) os.chmod(self.directory, stat.S_IREAD) try: with self.assertRaises(IOError): py_compile.compile(self.source_path, self.pyc_path) finally: os.chmod(self.directory, mode.st_mode) def test_bad_coding(self): bad_coding = os.path.join(os.path.dirname(__file__), 'bad_coding2.py') with support.captured_stderr(): self.assertIsNone(py_compile.compile(bad_coding, doraise=False)) self.assertFalse(os.path.exists( importlib.util.cache_from_source(bad_coding))) def test_source_date_epoch(self): py_compile.compile(self.source_path, self.pyc_path) self.assertTrue(os.path.exists(self.pyc_path)) self.assertFalse(os.path.exists(self.cache_path)) with open(self.pyc_path, 'rb') as fp: flags = importlib._bootstrap_external._classify_pyc( fp.read(), 'test', {}) if os.environ.get('SOURCE_DATE_EPOCH'): expected_flags = 0b11 else: expected_flags = 0b00 self.assertEqual(flags, expected_flags) @unittest.skipIf(sys.flags.optimize > 0, 'test does not work with -O') def test_double_dot_no_clobber(self): # http://bugs.python.org/issue22966 # py_compile foo.bar.py -> __pycache__/foo.cpython-34.pyc weird_path = os.path.join(self.directory, 'foo.bar.py') cache_path = importlib.util.cache_from_source(weird_path) pyc_path = weird_path + 'c' head, tail = os.path.split(cache_path) penultimate_tail = os.path.basename(head) self.assertEqual( os.path.join(penultimate_tail, tail), os.path.join( '__pycache__', 'foo.bar.{}.pyc'.format(sys.implementation.cache_tag))) with open(weird_path, 'w') as file: file.write('x = 123\n') py_compile.compile(weird_path) self.assertTrue(os.path.exists(cache_path)) self.assertFalse(os.path.exists(pyc_path)) def test_optimization_path(self): # Specifying optimized bytecode should lead to a path reflecting that. self.assertIn('opt-2', py_compile.compile(self.source_path, optimize=2)) def test_invalidation_mode(self): py_compile.compile( self.source_path, invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH, ) with open(self.cache_path, 'rb') as fp: flags = importlib._bootstrap_external._classify_pyc( fp.read(), 'test', {}) self.assertEqual(flags, 0b11) py_compile.compile( self.source_path, invalidation_mode=py_compile.PycInvalidationMode.UNCHECKED_HASH, ) with open(self.cache_path, 'rb') as fp: flags = importlib._bootstrap_external._classify_pyc( fp.read(), 'test', {}) self.assertEqual(flags, 0b1) class PyCompileTestsWithSourceEpoch(PyCompileTestsBase, unittest.TestCase, metaclass=SourceDateEpochTestMeta, source_date_epoch=True): pass class PyCompileTestsWithoutSourceEpoch(PyCompileTestsBase, unittest.TestCase, metaclass=SourceDateEpochTestMeta, source_date_epoch=False): pass if __name__ == "__main__": unittest.main()