import imp import importlib import os import os.path import shutil import sys from test import support import unittest import warnings class LockTests(unittest.TestCase): """Very basic test of import lock functions.""" def verify_lock_state(self, expected): self.assertEqual(imp.lock_held(), expected, "expected imp.lock_held() to be %r" % expected) def testLock(self): LOOPS = 50 # The import lock may already be held, e.g. if the test suite is run # via "import test.autotest". lock_held_at_start = imp.lock_held() self.verify_lock_state(lock_held_at_start) for i in range(LOOPS): imp.acquire_lock() self.verify_lock_state(True) for i in range(LOOPS): imp.release_lock() # The original state should be restored now. self.verify_lock_state(lock_held_at_start) if not lock_held_at_start: try: imp.release_lock() except RuntimeError: pass else: self.fail("release_lock() without lock should raise " "RuntimeError") class ImportTests(unittest.TestCase): def setUp(self): mod = importlib.import_module('test.encoded_modules') self.test_strings = mod.test_strings self.test_path = mod.__path__ def test_import_encoded_module(self): for modname, encoding, teststr in self.test_strings: mod = importlib.import_module('test.encoded_modules.' 'module_' + modname) self.assertEqual(teststr, mod.test) def test_find_module_encoding(self): for mod, encoding, _ in self.test_strings: with imp.find_module('module_' + mod, self.test_path)[0] as fd: self.assertEqual(fd.encoding, encoding) path = [os.path.dirname(__file__)] with self.assertRaises(SyntaxError): imp.find_module('badsyntax_pep3120', path) def test_issue1267(self): for mod, encoding, _ in self.test_strings: fp, filename, info = imp.find_module('module_' + mod, self.test_path) with fp: self.assertNotEqual(fp, None) self.assertEqual(fp.encoding, encoding) self.assertEqual(fp.tell(), 0) self.assertEqual(fp.readline(), '# test %s encoding\n' % encoding) fp, filename, info = imp.find_module("tokenize") with fp: self.assertNotEqual(fp, None) self.assertEqual(fp.encoding, "utf-8") self.assertEqual(fp.tell(), 0) self.assertEqual(fp.readline(), '"""Tokenization help for Python programs.\n') def test_issue3594(self): temp_mod_name = 'test_imp_helper' sys.path.insert(0, '.') try: with open(temp_mod_name + '.py', 'w') as file: file.write("# coding: cp1252\nu = 'test.test_imp'\n") file, filename, info = imp.find_module(temp_mod_name) file.close() self.assertEqual(file.encoding, 'cp1252') finally: del sys.path[0] support.unlink(temp_mod_name + '.py') support.unlink(temp_mod_name + '.pyc') support.unlink(temp_mod_name + '.pyo') def test_issue5604(self): # Test cannot cover imp.load_compiled function. # Martin von Loewis note what shared library cannot have non-ascii # character because init_xxx function cannot be compiled # and issue never happens for dynamic modules. # But sources modified to follow generic way for processing pathes. # the return encoding could be uppercase or None fs_encoding = sys.getfilesystemencoding() # covers utf-8 and Windows ANSI code pages # one non-space symbol from every page # (http://en.wikipedia.org/wiki/Code_page) known_locales = { 'utf-8' : b'\xc3\xa4', 'cp1250' : b'\x8C', 'cp1251' : b'\xc0', 'cp1252' : b'\xc0', 'cp1253' : b'\xc1', 'cp1254' : b'\xc0', 'cp1255' : b'\xe0', 'cp1256' : b'\xe0', 'cp1257' : b'\xc0', 'cp1258' : b'\xc0', } if sys.platform == 'darwin': self.assertEqual(fs_encoding, 'utf-8') # Mac OS X uses the Normal Form D decomposition # http://developer.apple.com/mac/library/qa/qa2001/qa1173.html special_char = b'a\xcc\x88' else: special_char = known_locales.get(fs_encoding) if not special_char: self.skipTest("can't run this test with %s as filesystem encoding" % fs_encoding) decoded_char = special_char.decode(fs_encoding) temp_mod_name = 'test_imp_helper_' + decoded_char test_package_name = 'test_imp_helper_package_' + decoded_char init_file_name = os.path.join(test_package_name, '__init__.py') try: # if the curdir is not in sys.path the test fails when run with # ./python ./Lib/test/regrtest.py test_imp sys.path.insert(0, os.curdir) with open(temp_mod_name + '.py', 'w') as file: file.write('a = 1\n') file, filename, info = imp.find_module(temp_mod_name) with file: self.assertIsNotNone(file) self.assertTrue(filename[:-3].endswith(temp_mod_name)) self.assertEqual(info[0], '.py') self.assertEqual(info[1], 'U') self.assertEqual(info[2], imp.PY_SOURCE) mod = imp.load_module(temp_mod_name, file, filename, info) self.assertEqual(mod.a, 1) with warnings.catch_warnings(): warnings.simplefilter('ignore') mod = imp.load_source(temp_mod_name, temp_mod_name + '.py') self.assertEqual(mod.a, 1) with warnings.catch_warnings(): warnings.simplefilter('ignore') if not sys.dont_write_bytecode: mod = imp.load_compiled( temp_mod_name, imp.cache_from_source(temp_mod_name + '.py')) self.assertEqual(mod.a, 1) if not os.path.exists(test_package_name): os.mkdir(test_package_name) with open(init_file_name, 'w') as file: file.write('b = 2\n') with warnings.catch_warnings(): warnings.simplefilter('ignore') package = imp.load_package(test_package_name, test_package_name) self.assertEqual(package.b, 2) finally: del sys.path[0] for ext in ('.py', '.pyc', '.pyo'): support.unlink(temp_mod_name + ext) support.unlink(init_file_name + ext) support.rmtree(test_package_name) def test_issue9319(self): path = os.path.dirname(__file__) self.assertRaises(SyntaxError, imp.find_module, "badsyntax_pep3120", [path]) def test_load_from_source(self): # Verify that the imp module can correctly load and find .py files # XXX (ncoghlan): It would be nice to use support.CleanImport # here, but that breaks because the os module registers some # handlers in copy_reg on import. Since CleanImport doesn't # revert that registration, the module is left in a broken # state after reversion. Reinitialising the module contents # and just reverting os.environ to its previous state is an OK # workaround orig_path = os.path orig_getenv = os.getenv with support.EnvironmentVarGuard(): x = imp.find_module("os") self.addCleanup(x[0].close) new_os = imp.load_module("os", *x) self.assertIs(os, new_os) self.assertIs(orig_path, new_os.path) self.assertIsNot(orig_getenv, new_os.getenv) @support.cpython_only @unittest.skipIf(not hasattr(imp, 'load_dynamic'), 'imp.load_dynamic() required') def test_issue15828_load_extensions(self): # Issue 15828 picked up that the adapter between the old imp API # and importlib couldn't handle C extensions example = "_heapq" x = imp.find_module(example) file_ = x[0] if file_ is not None: self.addCleanup(file_.close) mod = imp.load_module(example, *x) self.assertEqual(mod.__name__, example) def test_load_dynamic_ImportError_path(self): # Issue #1559549 added `name` and `path` attributes to ImportError # in order to provide better detail. Issue #10854 implemented those # attributes on import failures of extensions on Windows. path = 'bogus file path' name = 'extension' with self.assertRaises(ImportError) as err: imp.load_dynamic(name, path) self.assertIn(path, err.exception.path) self.assertEqual(name, err.exception.name) @support.cpython_only @unittest.skipIf(not hasattr(imp, 'load_dynamic'), 'imp.load_dynamic() required') def test_load_module_extension_file_is_None(self): # When loading an extension module and the file is None, open one # on the behalf of imp.load_dynamic(). # Issue #15902 name = '_heapq' found = imp.find_module(name) if found[0] is not None: found[0].close() if found[2][2] != imp.C_EXTENSION: return imp.load_module(name, None, *found[1:]) class ReloadTests(unittest.TestCase): """Very basic tests to make sure that imp.reload() operates just like reload().""" def test_source(self): # XXX (ncoghlan): It would be nice to use test.support.CleanImport # here, but that breaks because the os module registers some # handlers in copy_reg on import. Since CleanImport doesn't # revert that registration, the module is left in a broken # state after reversion. Reinitialising the module contents # and just reverting os.environ to its previous state is an OK # workaround with support.EnvironmentVarGuard(): import os imp.reload(os) def test_extension(self): with support.CleanImport('time'): import time imp.reload(time) def test_builtin(self): with support.CleanImport('marshal'): import marshal imp.reload(marshal) class PEP3147Tests(unittest.TestCase): """Tests of PEP 3147.""" tag = imp.get_tag() @unittest.skipUnless(sys.implementation.cache_tag is not None, 'requires sys.implementation.cache_tag not be None') def test_cache_from_source(self): # Given the path to a .py file, return the path to its PEP 3147 # defined .pyc file (i.e. under __pycache__). path = os.path.join('foo', 'bar', 'baz', 'qux.py') expect = os.path.join('foo', 'bar', 'baz', '__pycache__', 'qux.{}.pyc'.format(self.tag)) self.assertEqual(imp.cache_from_source(path, True), expect) def test_cache_from_source_no_cache_tag(self): # Non cache tag means NotImplementedError. with support.swap_attr(sys.implementation, 'cache_tag', None): with self.assertRaises(NotImplementedError): imp.cache_from_source('whatever.py') def test_cache_from_source_no_dot(self): # Directory with a dot, filename without dot. path = os.path.join('foo.bar', 'file') expect = os.path.join('foo.bar', '__pycache__', 'file{}.pyc'.format(self.tag)) self.assertEqual(imp.cache_from_source(path, True), expect) def test_cache_from_source_optimized(self): # Given the path to a .py file, return the path to its PEP 3147 # defined .pyo file (i.e. under __pycache__). path = os.path.join('foo', 'bar', 'baz', 'qux.py') expect = os.path.join('foo', 'bar', 'baz', '__pycache__', 'qux.{}.pyo'.format(self.tag)) self.assertEqual(imp.cache_from_source(path, False), expect) def test_cache_from_source_cwd(self): path = 'foo.py' expect = os.path.join('__pycache__', 'foo.{}.pyc'.format(self.tag)) self.assertEqual(imp.cache_from_source(path, True), expect) def test_cache_from_source_override(self): # When debug_override is not None, it can be any true-ish or false-ish # value. path = os.path.join('foo', 'bar', 'baz.py') partial_expect = os.path.join('foo', 'bar', '__pycache__', 'baz.{}.py'.format(self.tag)) self.assertEqual(imp.cache_from_source(path, []), partial_expect + 'o') self.assertEqual(imp.cache_from_source(path, [17]), partial_expect + 'c') # However if the bool-ishness can't be determined, the exception # propagates. class Bearish: def __bool__(self): raise RuntimeError with self.assertRaises(RuntimeError): imp.cache_from_source('/foo/bar/baz.py', Bearish()) @unittest.skipUnless(os.sep == '\\' and os.altsep == '/', 'test meaningful only where os.altsep is defined') def test_sep_altsep_and_sep_cache_from_source(self): # Windows path and PEP 3147 where sep is right of altsep. self.assertEqual( imp.cache_from_source('\\foo\\bar\\baz/qux.py', True), '\\foo\\bar\\baz\\__pycache__\\qux.{}.pyc'.format(self.tag)) @unittest.skipUnless(sys.implementation.cache_tag is not None, 'requires sys.implementation.cache_tag to not be ' 'None') def test_source_from_cache(self): # Given the path to a PEP 3147 defined .pyc file, return the path to # its source. This tests the good path. path = os.path.join('foo', 'bar', 'baz', '__pycache__', 'qux.{}.pyc'.format(self.tag)) expect = os.path.join('foo', 'bar', 'baz', 'qux.py') self.assertEqual(imp.source_from_cache(path), expect) def test_source_from_cache_no_cache_tag(self): # If sys.implementation.cache_tag is None, raise NotImplementedError. path = os.path.join('blah', '__pycache__', 'whatever.pyc') with support.swap_attr(sys.implementation, 'cache_tag', None): with self.assertRaises(NotImplementedError): imp.source_from_cache(path) def test_source_from_cache_bad_path(self): # When the path to a pyc file is not in PEP 3147 format, a ValueError # is raised. self.assertRaises( ValueError, imp.source_from_cache, '/foo/bar/bazqux.pyc') def test_source_from_cache_no_slash(self): # No slashes at all in path -> ValueError self.assertRaises( ValueError, imp.source_from_cache, 'foo.cpython-32.pyc') def test_source_from_cache_too_few_dots(self): # Too few dots in final path component -> ValueError self.assertRaises( ValueError, imp.source_from_cache, '__pycache__/foo.pyc') def test_source_from_cache_too_many_dots(self): # Too many dots in final path component -> ValueError self.assertRaises( ValueError, imp.source_from_cache, '__pycache__/foo.cpython-32.foo.pyc') def test_source_from_cache_no__pycache__(self): # Another problem with the path -> ValueError self.assertRaises( ValueError, imp.source_from_cache, '/foo/bar/foo.cpython-32.foo.pyc') def test_package___file__(self): try: m = __import__('pep3147') except ImportError: pass else: self.fail("pep3147 module already exists: %r" % (m,)) # Test that a package's __file__ points to the right source directory. os.mkdir('pep3147') sys.path.insert(0, os.curdir) def cleanup(): if sys.path[0] == os.curdir: del sys.path[0] shutil.rmtree('pep3147') self.addCleanup(cleanup) # Touch the __init__.py file. support.create_empty_file('pep3147/__init__.py') importlib.invalidate_caches() expected___file__ = os.sep.join(('.', 'pep3147', '__init__.py')) m = __import__('pep3147') self.assertEqual(m.__file__, expected___file__, (m.__file__, m.__path__, sys.path, sys.path_importer_cache)) # Ensure we load the pyc file. support.unload('pep3147') m = __import__('pep3147') support.unload('pep3147') self.assertEqual(m.__file__, expected___file__, (m.__file__, m.__path__, sys.path, sys.path_importer_cache)) class NullImporterTests(unittest.TestCase): @unittest.skipIf(support.TESTFN_UNENCODABLE is None, "Need an undecodeable filename") def test_unencodeable(self): name = support.TESTFN_UNENCODABLE os.mkdir(name) try: self.assertRaises(ImportError, imp.NullImporter, name) finally: os.rmdir(name) def test_main(): tests = [ ImportTests, PEP3147Tests, ReloadTests, NullImporterTests, ] try: import _thread except ImportError: pass else: tests.append(LockTests) support.run_unittest(*tests) if __name__ == "__main__": test_main()