1 try: 2 import _thread 3 except ImportError: 4 _thread = None 5 import importlib 6 import importlib.util 7 import os 8 import os.path 9 import sys 10 from test import support 11 import unittest 12 import warnings 13 with warnings.catch_warnings(): 14 warnings.simplefilter('ignore', DeprecationWarning) 15 import imp 16 17 18 def requires_load_dynamic(meth): 19 """Decorator to skip a test if not running under CPython or lacking 20 imp.load_dynamic().""" 21 meth = support.cpython_only(meth) 22 return unittest.skipIf(not hasattr(imp, 'load_dynamic'), 23 'imp.load_dynamic() required')(meth) 24 25 26 @unittest.skipIf(_thread is None, '_thread module is required') 27 class LockTests(unittest.TestCase): 28 29 """Very basic test of import lock functions.""" 30 31 def verify_lock_state(self, expected): 32 self.assertEqual(imp.lock_held(), expected, 33 "expected imp.lock_held() to be %r" % expected) 34 def testLock(self): 35 LOOPS = 50 36 37 # The import lock may already be held, e.g. if the test suite is run 38 # via "import test.autotest". 39 lock_held_at_start = imp.lock_held() 40 self.verify_lock_state(lock_held_at_start) 41 42 for i in range(LOOPS): 43 imp.acquire_lock() 44 self.verify_lock_state(True) 45 46 for i in range(LOOPS): 47 imp.release_lock() 48 49 # The original state should be restored now. 50 self.verify_lock_state(lock_held_at_start) 51 52 if not lock_held_at_start: 53 try: 54 imp.release_lock() 55 except RuntimeError: 56 pass 57 else: 58 self.fail("release_lock() without lock should raise " 59 "RuntimeError") 60 61 class ImportTests(unittest.TestCase): 62 def setUp(self): 63 mod = importlib.import_module('test.encoded_modules') 64 self.test_strings = mod.test_strings 65 self.test_path = mod.__path__ 66 67 def test_import_encoded_module(self): 68 for modname, encoding, teststr in self.test_strings: 69 mod = importlib.import_module('test.encoded_modules.' 70 'module_' + modname) 71 self.assertEqual(teststr, mod.test) 72 73 def test_find_module_encoding(self): 74 for mod, encoding, _ in self.test_strings: 75 with imp.find_module('module_' + mod, self.test_path)[0] as fd: 76 self.assertEqual(fd.encoding, encoding) 77 78 path = [os.path.dirname(__file__)] 79 with self.assertRaises(SyntaxError): 80 imp.find_module('badsyntax_pep3120', path) 81 82 def test_issue1267(self): 83 for mod, encoding, _ in self.test_strings: 84 fp, filename, info = imp.find_module('module_' + mod, 85 self.test_path) 86 with fp: 87 self.assertNotEqual(fp, None) 88 self.assertEqual(fp.encoding, encoding) 89 self.assertEqual(fp.tell(), 0) 90 self.assertEqual(fp.readline(), '# test %s encoding\n' 91 % encoding) 92 93 fp, filename, info = imp.find_module("tokenize") 94 with fp: 95 self.assertNotEqual(fp, None) 96 self.assertEqual(fp.encoding, "utf-8") 97 self.assertEqual(fp.tell(), 0) 98 self.assertEqual(fp.readline(), 99 '"""Tokenization help for Python programs.\n') 100 101 def test_issue3594(self): 102 temp_mod_name = 'test_imp_helper' 103 sys.path.insert(0, '.') 104 try: 105 with open(temp_mod_name + '.py', 'w') as file: 106 file.write("# coding: cp1252\nu = 'test.test_imp'\n") 107 file, filename, info = imp.find_module(temp_mod_name) 108 file.close() 109 self.assertEqual(file.encoding, 'cp1252') 110 finally: 111 del sys.path[0] 112 support.unlink(temp_mod_name + '.py') 113 support.unlink(temp_mod_name + '.pyc') 114 115 def test_issue5604(self): 116 # Test cannot cover imp.load_compiled function. 117 # Martin von Loewis note what shared library cannot have non-ascii 118 # character because init_xxx function cannot be compiled 119 # and issue never happens for dynamic modules. 120 # But sources modified to follow generic way for processing pathes. 121 122 # the return encoding could be uppercase or None 123 fs_encoding = sys.getfilesystemencoding() 124 125 # covers utf-8 and Windows ANSI code pages 126 # one non-space symbol from every page 127 # (http://en.wikipedia.org/wiki/Code_page) 128 known_locales = { 129 'utf-8' : b'\xc3\xa4', 130 'cp1250' : b'\x8C', 131 'cp1251' : b'\xc0', 132 'cp1252' : b'\xc0', 133 'cp1253' : b'\xc1', 134 'cp1254' : b'\xc0', 135 'cp1255' : b'\xe0', 136 'cp1256' : b'\xe0', 137 'cp1257' : b'\xc0', 138 'cp1258' : b'\xc0', 139 } 140 141 if sys.platform == 'darwin': 142 self.assertEqual(fs_encoding, 'utf-8') 143 # Mac OS X uses the Normal Form D decomposition 144 # http://developer.apple.com/mac/library/qa/qa2001/qa1173.html 145 special_char = b'a\xcc\x88' 146 else: 147 special_char = known_locales.get(fs_encoding) 148 149 if not special_char: 150 self.skipTest("can't run this test with %s as filesystem encoding" 151 % fs_encoding) 152 decoded_char = special_char.decode(fs_encoding) 153 temp_mod_name = 'test_imp_helper_' + decoded_char 154 test_package_name = 'test_imp_helper_package_' + decoded_char 155 init_file_name = os.path.join(test_package_name, '__init__.py') 156 try: 157 # if the curdir is not in sys.path the test fails when run with 158 # ./python ./Lib/test/regrtest.py test_imp 159 sys.path.insert(0, os.curdir) 160 with open(temp_mod_name + '.py', 'w') as file: 161 file.write('a = 1\n') 162 file, filename, info = imp.find_module(temp_mod_name) 163 with file: 164 self.assertIsNotNone(file) 165 self.assertTrue(filename[:-3].endswith(temp_mod_name)) 166 self.assertEqual(info[0], '.py') 167 self.assertEqual(info[1], 'r') 168 self.assertEqual(info[2], imp.PY_SOURCE) 169 170 mod = imp.load_module(temp_mod_name, file, filename, info) 171 self.assertEqual(mod.a, 1) 172 173 with warnings.catch_warnings(): 174 warnings.simplefilter('ignore') 175 mod = imp.load_source(temp_mod_name, temp_mod_name + '.py') 176 self.assertEqual(mod.a, 1) 177 178 with warnings.catch_warnings(): 179 warnings.simplefilter('ignore') 180 if not sys.dont_write_bytecode: 181 mod = imp.load_compiled( 182 temp_mod_name, 183 imp.cache_from_source(temp_mod_name + '.py')) 184 self.assertEqual(mod.a, 1) 185 186 if not os.path.exists(test_package_name): 187 os.mkdir(test_package_name) 188 with open(init_file_name, 'w') as file: 189 file.write('b = 2\n') 190 with warnings.catch_warnings(): 191 warnings.simplefilter('ignore') 192 package = imp.load_package(test_package_name, test_package_name) 193 self.assertEqual(package.b, 2) 194 finally: 195 del sys.path[0] 196 for ext in ('.py', '.pyc'): 197 support.unlink(temp_mod_name + ext) 198 support.unlink(init_file_name + ext) 199 support.rmtree(test_package_name) 200 support.rmtree('__pycache__') 201 202 def test_issue9319(self): 203 path = os.path.dirname(__file__) 204 self.assertRaises(SyntaxError, 205 imp.find_module, "badsyntax_pep3120", [path]) 206 207 def test_load_from_source(self): 208 # Verify that the imp module can correctly load and find .py files 209 # XXX (ncoghlan): It would be nice to use support.CleanImport 210 # here, but that breaks because the os module registers some 211 # handlers in copy_reg on import. Since CleanImport doesn't 212 # revert that registration, the module is left in a broken 213 # state after reversion. Reinitialising the module contents 214 # and just reverting os.environ to its previous state is an OK 215 # workaround 216 orig_path = os.path 217 orig_getenv = os.getenv 218 with support.EnvironmentVarGuard(): 219 x = imp.find_module("os") 220 self.addCleanup(x[0].close) 221 new_os = imp.load_module("os", *x) 222 self.assertIs(os, new_os) 223 self.assertIs(orig_path, new_os.path) 224 self.assertIsNot(orig_getenv, new_os.getenv) 225 226 @requires_load_dynamic 227 def test_issue15828_load_extensions(self): 228 # Issue 15828 picked up that the adapter between the old imp API 229 # and importlib couldn't handle C extensions 230 example = "_heapq" 231 x = imp.find_module(example) 232 file_ = x[0] 233 if file_ is not None: 234 self.addCleanup(file_.close) 235 mod = imp.load_module(example, *x) 236 self.assertEqual(mod.__name__, example) 237 238 @requires_load_dynamic 239 def test_issue16421_multiple_modules_in_one_dll(self): 240 # Issue 16421: loading several modules from the same compiled file fails 241 m = '_testimportmultiple' 242 fileobj, pathname, description = imp.find_module(m) 243 fileobj.close() 244 mod0 = imp.load_dynamic(m, pathname) 245 mod1 = imp.load_dynamic('_testimportmultiple_foo', pathname) 246 mod2 = imp.load_dynamic('_testimportmultiple_bar', pathname) 247 self.assertEqual(mod0.__name__, m) 248 self.assertEqual(mod1.__name__, '_testimportmultiple_foo') 249 self.assertEqual(mod2.__name__, '_testimportmultiple_bar') 250 with self.assertRaises(ImportError): 251 imp.load_dynamic('nonexistent', pathname) 252 253 @requires_load_dynamic 254 def test_load_dynamic_ImportError_path(self): 255 # Issue #1559549 added `name` and `path` attributes to ImportError 256 # in order to provide better detail. Issue #10854 implemented those 257 # attributes on import failures of extensions on Windows. 258 path = 'bogus file path' 259 name = 'extension' 260 with self.assertRaises(ImportError) as err: 261 imp.load_dynamic(name, path) 262 self.assertIn(path, err.exception.path) 263 self.assertEqual(name, err.exception.name) 264 265 @requires_load_dynamic 266 def test_load_module_extension_file_is_None(self): 267 # When loading an extension module and the file is None, open one 268 # on the behalf of imp.load_dynamic(). 269 # Issue #15902 270 name = '_testimportmultiple' 271 found = imp.find_module(name) 272 if found[0] is not None: 273 found[0].close() 274 if found[2][2] != imp.C_EXTENSION: 275 self.skipTest("found module doesn't appear to be a C extension") 276 imp.load_module(name, None, *found[1:]) 277 278 @requires_load_dynamic 279 def test_issue24748_load_module_skips_sys_modules_check(self): 280 name = 'test.imp_dummy' 281 try: 282 del sys.modules[name] 283 except KeyError: 284 pass 285 try: 286 module = importlib.import_module(name) 287 spec = importlib.util.find_spec('_testmultiphase') 288 module = imp.load_dynamic(name, spec.origin) 289 self.assertEqual(module.__name__, name) 290 self.assertEqual(module.__spec__.name, name) 291 self.assertEqual(module.__spec__.origin, spec.origin) 292 self.assertRaises(AttributeError, getattr, module, 'dummy_name') 293 self.assertEqual(module.int_const, 1969) 294 self.assertIs(sys.modules[name], module) 295 finally: 296 try: 297 del sys.modules[name] 298 except KeyError: 299 pass 300 301 @unittest.skipIf(sys.dont_write_bytecode, 302 "test meaningful only when writing bytecode") 303 def test_bug7732(self): 304 with support.temp_cwd(): 305 source = support.TESTFN + '.py' 306 os.mkdir(source) 307 self.assertRaisesRegex(ImportError, '^No module', 308 imp.find_module, support.TESTFN, ["."]) 309 310 def test_multiple_calls_to_get_data(self): 311 # Issue #18755: make sure multiple calls to get_data() can succeed. 312 loader = imp._LoadSourceCompatibility('imp', imp.__file__, 313 open(imp.__file__)) 314 loader.get_data(imp.__file__) # File should be closed 315 loader.get_data(imp.__file__) # Will need to create a newly opened file 316 317 318 class ReloadTests(unittest.TestCase): 319 320 """Very basic tests to make sure that imp.reload() operates just like 321 reload().""" 322 323 def test_source(self): 324 # XXX (ncoghlan): It would be nice to use test.support.CleanImport 325 # here, but that breaks because the os module registers some 326 # handlers in copy_reg on import. Since CleanImport doesn't 327 # revert that registration, the module is left in a broken 328 # state after reversion. Reinitialising the module contents 329 # and just reverting os.environ to its previous state is an OK 330 # workaround 331 with support.EnvironmentVarGuard(): 332 import os 333 imp.reload(os) 334 335 def test_extension(self): 336 with support.CleanImport('time'): 337 import time 338 imp.reload(time) 339 340 def test_builtin(self): 341 with support.CleanImport('marshal'): 342 import marshal 343 imp.reload(marshal) 344 345 def test_with_deleted_parent(self): 346 # see #18681 347 from html import parser 348 html = sys.modules.pop('html') 349 def cleanup(): 350 sys.modules['html'] = html 351 self.addCleanup(cleanup) 352 with self.assertRaisesRegex(ImportError, 'html'): 353 imp.reload(parser) 354 355 356 class PEP3147Tests(unittest.TestCase): 357 """Tests of PEP 3147.""" 358 359 tag = imp.get_tag() 360 361 @unittest.skipUnless(sys.implementation.cache_tag is not None, 362 'requires sys.implementation.cache_tag not be None') 363 def test_cache_from_source(self): 364 # Given the path to a .py file, return the path to its PEP 3147 365 # defined .pyc file (i.e. under __pycache__). 366 path = os.path.join('foo', 'bar', 'baz', 'qux.py') 367 expect = os.path.join('foo', 'bar', 'baz', '__pycache__', 368 'qux.{}.pyc'.format(self.tag)) 369 self.assertEqual(imp.cache_from_source(path, True), expect) 370 371 @unittest.skipUnless(sys.implementation.cache_tag is not None, 372 'requires sys.implementation.cache_tag to not be ' 373 'None') 374 def test_source_from_cache(self): 375 # Given the path to a PEP 3147 defined .pyc file, return the path to 376 # its source. This tests the good path. 377 path = os.path.join('foo', 'bar', 'baz', '__pycache__', 378 'qux.{}.pyc'.format(self.tag)) 379 expect = os.path.join('foo', 'bar', 'baz', 'qux.py') 380 self.assertEqual(imp.source_from_cache(path), expect) 381 382 383 class NullImporterTests(unittest.TestCase): 384 @unittest.skipIf(support.TESTFN_UNENCODABLE is None, 385 "Need an undecodeable filename") 386 def test_unencodeable(self): 387 name = support.TESTFN_UNENCODABLE 388 os.mkdir(name) 389 try: 390 self.assertRaises(ImportError, imp.NullImporter, name) 391 finally: 392 os.rmdir(name) 393 394 395 if __name__ == "__main__": 396 unittest.main() 397
