diff options
Diffstat (limited to 'Lib/test/test_import.py')
| -rw-r--r-- | Lib/test/test_import.py | 364 |
1 files changed, 193 insertions, 171 deletions
diff --git a/Lib/test/test_import.py b/Lib/test/test_import.py index 60346ab9fc..5751901584 100644 --- a/Lib/test/test_import.py +++ b/Lib/test/test_import.py @@ -1,16 +1,15 @@ -import unittest +import imp +import marshal import os -import stat +import py_compile import random -import shutil +import stat import sys -import py_compile -import warnings -import marshal -import imp -from test.test_support import (unlink, TESTFN, unload, run_unittest, - check_warnings, TestFailed) - +import unittest +from test.test_support import (unlink, TESTFN, unload, run_unittest, rmtree, + is_jython, check_warnings, EnvironmentVarGuard) +import textwrap +from test import script_helper def remove_files(name): for f in (name + os.extsep + "py", @@ -18,15 +17,18 @@ def remove_files(name): name + os.extsep + "pyo", name + os.extsep + "pyw", name + "$py.class"): - if os.path.exists(f): - os.remove(f) + unlink(f) + +class ImportTests(unittest.TestCase): -class ImportTest(unittest.TestCase): + def tearDown(self): + unload(TESTFN) + setUp = tearDown - def testCaseSensitivity(self): - # Brief digression to test that import is case-sensitive: if we got this - # far, we know for sure that "random" exists. + def test_case_sensitivity(self): + # Brief digression to test that import is case-sensitive: if we got + # this far, we know for sure that "random" exists. try: import RAnDoM except ImportError: @@ -34,163 +36,162 @@ class ImportTest(unittest.TestCase): else: self.fail("import of RAnDoM should have failed (case mismatch)") - def testDoubleConst(self): - # Another brief digression to test the accuracy of manifest float constants. + def test_double_const(self): + # Another brief digression to test the accuracy of manifest float + # constants. from test import double_const # don't blink -- that *was* the test - def testImport(self): + def test_import(self): def test_with_extension(ext): - # ext normally ".py"; perhaps ".pyw" + # The extension is normally ".py", perhaps ".pyw". source = TESTFN + ext pyo = TESTFN + os.extsep + "pyo" - if sys.platform.startswith('java'): + if is_jython: pyc = TESTFN + "$py.class" else: pyc = TESTFN + os.extsep + "pyc" - f = open(source, "w") - print >> f, "# This tests Python's ability to import a", ext, "file." - a = random.randrange(1000) - b = random.randrange(1000) - print >> f, "a =", a - print >> f, "b =", b - f.close() + with open(source, "w") as f: + print >> f, ("# This tests Python's ability to import a", ext, + "file.") + a = random.randrange(1000) + b = random.randrange(1000) + print >> f, "a =", a + print >> f, "b =", b try: mod = __import__(TESTFN) except ImportError, err: self.fail("import from %s failed: %s" % (ext, err)) else: - self.assertEquals(mod.a, a, + self.assertEqual(mod.a, a, "module loaded (%s) but contents invalid" % mod) - self.assertEquals(mod.b, b, + self.assertEqual(mod.b, b, "module loaded (%s) but contents invalid" % mod) finally: - os.unlink(source) + unlink(source) try: imp.reload(mod) except ImportError, err: self.fail("import from .pyc/.pyo failed: %s" % err) finally: - try: - os.unlink(pyc) - except OSError: - pass - try: - os.unlink(pyo) - except OSError: - pass - del sys.modules[TESTFN] + unlink(pyc) + unlink(pyo) + unload(TESTFN) sys.path.insert(0, os.curdir) try: test_with_extension(os.extsep + "py") if sys.platform.startswith("win"): - for ext in ".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw": + for ext in [".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw"]: test_with_extension(ext) finally: del sys.path[0] - if os.name == 'posix': - def test_execute_bit_not_copied(self): - # Issue 6070: under posix .pyc files got their execute bit set if - # the .py file had the execute bit set, but they aren't executable. - oldmask = os.umask(022) - sys.path.insert(0, os.curdir) - try: - fname = TESTFN + os.extsep + "py" - f = open(fname, 'w').close() - os.chmod(fname, (stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH | - stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)) - __import__(TESTFN) - fn = fname + 'c' + @unittest.skipUnless(os.name == 'posix', "test meaningful only on posix systems") + def test_execute_bit_not_copied(self): + # Issue 6070: under posix .pyc files got their execute bit set if + # the .py file had the execute bit set, but they aren't executable. + oldmask = os.umask(022) + sys.path.insert(0, os.curdir) + try: + fname = TESTFN + os.extsep + "py" + f = open(fname, 'w').close() + os.chmod(fname, (stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH | + stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)) + __import__(TESTFN) + fn = fname + 'c' + if not os.path.exists(fn): + fn = fname + 'o' if not os.path.exists(fn): - fn = fname + 'o' - if not os.path.exists(fn): raise TestFailed("__import__ did " - "not result in creation of either a .pyc or .pyo file") - s = os.stat(fn) - self.assertEquals(stat.S_IMODE(s.st_mode), - stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH) - finally: - os.umask(oldmask) - remove_files(TESTFN) - if TESTFN in sys.modules: del sys.modules[TESTFN] - del sys.path[0] + self.fail("__import__ did not result in creation of " + "either a .pyc or .pyo file") + s = os.stat(fn) + self.assertEqual(stat.S_IMODE(s.st_mode), + stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH) + finally: + os.umask(oldmask) + remove_files(TESTFN) + unload(TESTFN) + del sys.path[0] - def testImpModule(self): + def test_imp_module(self): # Verify that the imp module can correctly load and find .py files - import imp - x = imp.find_module("os") - os = imp.load_module("os", *x) + + # 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 + orig_path = os.path + orig_getenv = os.getenv + with EnvironmentVarGuard(): + x = imp.find_module("os") + 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) def test_module_with_large_stack(self, module='longlist'): - # create module w/list of 65000 elements to test bug #561858 + # Regression test for http://bugs.python.org/issue561858. filename = module + os.extsep + 'py' - # create a file with a list of 65000 elements - f = open(filename, 'w+') - f.write('d = [\n') - for i in range(65000): - f.write('"",\n') - f.write(']') - f.close() - - # compile & remove .py file, we only need .pyc (or .pyo) - f = open(filename, 'r') - py_compile.compile(filename) - f.close() - os.unlink(filename) - - # need to be able to load from current dir + # Create a file with a list of 65000 elements. + with open(filename, 'w+') as f: + f.write('d = [\n') + for i in range(65000): + f.write('"",\n') + f.write(']') + + # Compile & remove .py file, we only need .pyc (or .pyo). + with open(filename, 'r') as f: + py_compile.compile(filename) + unlink(filename) + + # Need to be able to load from current dir. sys.path.append('') - # this used to crash + # This used to crash. exec 'import ' + module - # cleanup + # Cleanup. del sys.path[-1] - for ext in 'pyc', 'pyo': - fname = module + os.extsep + ext - if os.path.exists(fname): - os.unlink(fname) + unlink(filename + 'c') + unlink(filename + 'o') def test_failing_import_sticks(self): source = TESTFN + os.extsep + "py" - f = open(source, "w") - print >> f, "a = 1 // 0" - f.close() + with open(source, "w") as f: + print >> f, "a = 1 // 0" # New in 2.4, we shouldn't be able to import that no matter how often # we try. sys.path.insert(0, os.curdir) try: - for i in 1, 2, 3: - try: - mod = __import__(TESTFN) - except ZeroDivisionError: - if TESTFN in sys.modules: - self.fail("damaged module in sys.modules on %i. try" % i) - else: - self.fail("was able to import a damaged module on %i. try" % i) + for i in [1, 2, 3]: + self.assertRaises(ZeroDivisionError, __import__, TESTFN) + self.assertNotIn(TESTFN, sys.modules, + "damaged module in sys.modules on %i try" % i) finally: - sys.path.pop(0) + del sys.path[0] remove_files(TESTFN) def test_failing_reload(self): # A failing reload should leave the module object in sys.modules. source = TESTFN + os.extsep + "py" - f = open(source, "w") - print >> f, "a = 1" - print >> f, "b = 2" - f.close() + with open(source, "w") as f: + print >> f, "a = 1" + print >> f, "b = 2" sys.path.insert(0, os.curdir) try: mod = __import__(TESTFN) - self.assert_(TESTFN in sys.modules, "expected module in sys.modules") - self.assertEquals(mod.a, 1, "module has wrong attribute values") - self.assertEquals(mod.b, 2, "module has wrong attribute values") + self.assertIn(TESTFN, sys.modules) + self.assertEqual(mod.a, 1, "module has wrong attribute values") + self.assertEqual(mod.b, 2, "module has wrong attribute values") # On WinXP, just replacing the .py file wasn't enough to # convince reload() to reparse it. Maybe the timestamp didn't @@ -199,68 +200,73 @@ class ImportTest(unittest.TestCase): remove_files(TESTFN) # Now damage the module. - f = open(source, "w") - print >> f, "a = 10" - print >> f, "b = 20//0" - f.close() + with open(source, "w") as f: + print >> f, "a = 10" + print >> f, "b = 20//0" self.assertRaises(ZeroDivisionError, imp.reload, mod) # But we still expect the module to be in sys.modules. mod = sys.modules.get(TESTFN) - self.failIf(mod is None, "expected module to still be in sys.modules") + self.assertIsNot(mod, None, "expected module to be in sys.modules") # We should have replaced a w/ 10, but the old b value should # stick. - self.assertEquals(mod.a, 10, "module has wrong attribute values") - self.assertEquals(mod.b, 2, "module has wrong attribute values") + self.assertEqual(mod.a, 10, "module has wrong attribute values") + self.assertEqual(mod.b, 2, "module has wrong attribute values") finally: - sys.path.pop(0) + del sys.path[0] remove_files(TESTFN) - if TESTFN in sys.modules: - del sys.modules[TESTFN] + unload(TESTFN) def test_infinite_reload(self): - # Bug #742342 reports that Python segfaults (infinite recursion in C) - # when faced with self-recursive reload()ing. + # http://bugs.python.org/issue742342 reports that Python segfaults + # (infinite recursion in C) when faced with self-recursive reload()ing. sys.path.insert(0, os.path.dirname(__file__)) try: import infinite_reload finally: - sys.path.pop(0) + del sys.path[0] def test_import_name_binding(self): - # import x.y.z binds x in the current namespace + # import x.y.z binds x in the current namespace. import test as x import test.test_support - self.assert_(x is test, x.__name__) - self.assert_(hasattr(test.test_support, "__file__")) + self.assertIs(x, test, x.__name__) + self.assertTrue(hasattr(test.test_support, "__file__")) - # import x.y.z as w binds z as w + # import x.y.z as w binds z as w. import test.test_support as y - self.assert_(y is test.test_support, y.__name__) + self.assertIs(y, test.test_support, y.__name__) def test_import_initless_directory_warning(self): - with warnings.catch_warnings(): + with check_warnings(('', ImportWarning)): # Just a random non-package directory we always expect to be # somewhere in sys.path... - warnings.simplefilter('error', ImportWarning) - self.assertRaises(ImportWarning, __import__, "site-packages") + self.assertRaises(ImportError, __import__, "site-packages") - def test_importbyfilename(self): + def test_import_by_filename(self): path = os.path.abspath(TESTFN) - try: + with self.assertRaises(ImportError) as c: __import__(path) - except ImportError, err: - self.assertEqual("Import by filename is not supported.", - err.args[0]) - else: - self.fail("import by path didn't raise an exception") - - -class TestPycRewriting(unittest.TestCase): + self.assertEqual("Import by filename is not supported.", + c.exception.args[0]) + + def test_import_in_del_does_not_crash(self): + # Issue 4236 + testfn = script_helper.make_script('', TESTFN, textwrap.dedent("""\ + import sys + class C: + def __del__(self): + import imp + sys.argv.insert(0, C()) + """)) + script_helper.assert_python_ok(testfn) + + +class PycRewritingTests(unittest.TestCase): # Test that the `co_filename` attribute on code objects always points # to the right file, even when various things happen (e.g. both the .py # and the .pyc file are renamed). @@ -292,12 +298,10 @@ func_filename = func.func_code.co_filename if self.orig_module is not None: sys.modules[self.module_name] = self.orig_module else: - del sys.modules[self.module_name] - for file_name in self.file_name, self.compiled_name: - if os.path.exists(file_name): - os.remove(file_name) - if os.path.exists(self.dir_name): - shutil.rmtree(self.dir_name) + unload(self.module_name) + unlink(self.file_name) + unlink(self.compiled_name) + rmtree(self.dir_name) def import_module(self): ns = globals() @@ -351,6 +355,7 @@ func_filename = func.func_code.co_filename mod = self.import_module() self.assertEqual(mod.constant.co_filename, foreign_code.co_filename) + class PathsTests(unittest.TestCase): path = TESTFN @@ -359,58 +364,78 @@ class PathsTests(unittest.TestCase): self.syspath = sys.path[:] def tearDown(self): - shutil.rmtree(self.path) - sys.path = self.syspath + rmtree(self.path) + sys.path[:] = self.syspath - # http://bugs.python.org/issue1293 + # Regression test for http://bugs.python.org/issue1293. def test_trailing_slash(self): - f = open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') - f.write("testdata = 'test_trailing_slash'") - f.close() + with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f: + f.write("testdata = 'test_trailing_slash'") sys.path.append(self.path+'/') mod = __import__("test_trailing_slash") self.assertEqual(mod.testdata, 'test_trailing_slash') unload("test_trailing_slash") -class RelativeImport(unittest.TestCase): + # Regression test for http://bugs.python.org/issue3677. + def _test_UNC_path(self): + with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f: + f.write("testdata = 'test_trailing_slash'") + # Create the UNC path, like \\myhost\c$\foo\bar. + path = os.path.abspath(self.path) + import socket + hn = socket.gethostname() + drive = path[0] + unc = "\\\\%s\\%s$"%(hn, drive) + unc += path[2:] + sys.path.append(path) + mod = __import__("test_trailing_slash") + self.assertEqual(mod.testdata, 'test_trailing_slash') + unload("test_trailing_slash") + + if sys.platform == "win32": + test_UNC_path = _test_UNC_path + + +class RelativeImportTests(unittest.TestCase): + def tearDown(self): - try: - del sys.modules["test.relimport"] - except: - pass + unload("test.relimport") + setUp = tearDown def test_relimport_star(self): # This will import * from .test_import. from . import relimport - self.assertTrue(hasattr(relimport, "RelativeImport")) + self.assertTrue(hasattr(relimport, "RelativeImportTests")) def test_issue3221(self): + # Regression test for http://bugs.python.org/issue3221. def check_absolute(): exec "from os import path" in ns def check_relative(): exec "from . import relimport" in ns + # Check both OK with __package__ and __name__ correct ns = dict(__package__='test', __name__='test.notarealmodule') check_absolute() check_relative() + # Check both OK with only __name__ wrong ns = dict(__package__='test', __name__='notarealpkg.notarealmodule') check_absolute() check_relative() + # Check relative fails with only __package__ wrong ns = dict(__package__='foo', __name__='test.notarealmodule') - with check_warnings() as w: + with check_warnings(('.+foo', RuntimeWarning)): check_absolute() - self.assert_('foo' in str(w.message)) - self.assertEqual(w.category, RuntimeWarning) self.assertRaises(SystemError, check_relative) + # Check relative fails with __package__ and __name__ wrong ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule') - with check_warnings() as w: + with check_warnings(('.+foo', RuntimeWarning)): check_absolute() - self.assert_('foo' in str(w.message)) - self.assertEqual(w.category, RuntimeWarning) self.assertRaises(SystemError, check_relative) + # Check both fail with package set to a non-string ns = dict(__package__=object()) self.assertRaises(ValueError, check_absolute) @@ -420,19 +445,16 @@ class RelativeImport(unittest.TestCase): # If explicit relative import syntax is used, then do not try # to perform an absolute import in the face of failure. # Issue #7902. - try: + with self.assertRaises(ImportError): from .os import sep - except ImportError: - pass - else: self.fail("explicit relative import triggered an " "implicit absolute import") def test_main(verbose=None): - run_unittest(ImportTest, TestPycRewriting, PathsTests, RelativeImport) + run_unittest(ImportTests, PycRewritingTests, PathsTests, RelativeImportTests) if __name__ == '__main__': - # test needs to be a package, so we can do relative import + # Test needs to be a package, so we can do relative imports. from test.test_import import test_main test_main() |