import importlib.util import os import py_compile import shutil import stat import tempfile import unittest from test import support, script_helper class PyCompileTests(unittest.TestCase): 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): cwd = os.getcwd() os.chdir(self.directory) py_compile.compile(os.path.basename(self.source_path), os.path.basename(self.pyc_path)) os.chdir(cwd) 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(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) if __name__ == "__main__": unittest.main()