diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_import.py | 263 |
1 files changed, 158 insertions, 105 deletions
diff --git a/Lib/test/test_import.py b/Lib/test/test_import.py index 44e67c3..adf64e7 100644 --- a/Lib/test/test_import.py +++ b/Lib/test/test_import.py @@ -1,14 +1,18 @@ -import unittest +import imp +from importlib.test.import_ import test_relative_imports +from importlib.test.import_ import util as importlib_util +import marshal import os -import stat +import py_compile import random -import shutil +import stat import sys -import py_compile +import unittest import warnings -import imp -import marshal -from test.support import unlink, TESTFN, unload, run_unittest, TestFailed + +from test.support import ( + EnvironmentVarGuard, TESTFN, forget, is_jython, + rmtree, run_unittest, unlink, unload) def remove_files(name): @@ -17,15 +21,20 @@ def remove_files(name): name + ".pyo", name + ".pyw", name + "$py.class"): - if os.path.exists(f): - os.remove(f) + unlink(f) + rmtree('__pycache__') -class ImportTest(unittest.TestCase): +class ImportTests(unittest.TestCase): + + def tearDown(self): + unload(TESTFN) + + setUp = tearDown - def testCaseSensitivity(self): - # Brief digression to test that import is case-sensitive: if we got this - # far, we know for sure that "random" exists. + def test_case_sensitivity(self): + # Brief digression to test that import is case-sensitive: if we got + # this far, we know for sure that "random" exists. try: import RAnDoM except ImportError: @@ -33,22 +42,24 @@ class ImportTest(unittest.TestCase): else: self.fail("import of RAnDoM should have failed (case mismatch)") - def testDoubleConst(self): - # Another brief digression to test the accuracy of manifest float constants. + def test_double_const(self): + # Another brief digression to test the accuracy of manifest float + # constants. from test import double_const # don't blink -- that *was* the test - def testImport(self): + def test_import(self): def test_with_extension(ext): - # ext normally ".py"; perhaps ".pyw" + # The extension is normally ".py", perhaps ".pyw". source = TESTFN + ext pyo = TESTFN + ".pyo" - if sys.platform.startswith('java'): + if is_jython: pyc = TESTFN + "$py.class" else: pyc = TESTFN + ".pyc" with open(source, "w") as f: - print("# This tests Python's ability to import a", ext, "file.", file=f) + print("# This tests Python's ability to import a", + ext, "file.", file=f) a = random.randrange(1000) b = random.randrange(1000) print("a =", a, file=f) @@ -62,26 +73,27 @@ class ImportTest(unittest.TestCase): except ImportError as err: self.fail("import from %s failed: %s" % (ext, err)) - 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: + forget(TESTFN) unlink(source) unlink(pyc) unlink(pyo) - del sys.modules[TESTFN] sys.path.insert(0, os.curdir) try: test_with_extension(".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] - @unittest.skipUnless(os.name == 'posix', "test meaningful only on posix systems") + @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. @@ -107,48 +119,58 @@ class ImportTest(unittest.TestCase): if TESTFN in sys.modules: del sys.modules[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) + import imp, os + # 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 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 + '.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 - sys.path.append('') + # 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(']') - # this used to crash - exec('import ' + module) + try: + # Compile & remove .py file; we only need .pyc (or .pyo). + py_compile.compile(filename) + finally: + unlink(filename) - # cleanup - del sys.path[-1] - for ext in '.pyc', '.pyo': - fname = module + ext - if os.path.exists(fname): - os.unlink(fname) + # Need to be able to load from current dir. + sys.path.append('') + + try: + # This used to crash. + exec('import ' + module) + finally: + # Cleanup. + del sys.path[-1] + unlink(filename + 'c') + unlink(filename + 'o') def test_failing_import_sticks(self): source = TESTFN + ".py" - f = open(source, "w") - print("a = 1/0", file=f) - f.close() + with open(source, "w") as f: + print("a = 1/0", file=f) # New in 2.4, we shouldn't be able to import that no matter how often # we try. @@ -156,16 +178,12 @@ class ImportTest(unittest.TestCase): if TESTFN in sys.modules: del sys.modules[TESTFN] 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_import_name_binding(self): @@ -188,16 +206,16 @@ class ImportTest(unittest.TestCase): def test_failing_reload(self): # A failing reload should leave the module object in sys.modules. - source = TESTFN + ".py" + source = TESTFN + os.extsep + "py" with open(source, "w") as f: f.write("a = 1\nb=2\n") sys.path.insert(0, os.curdir) try: mod = __import__(TESTFN) - self.assertTrue(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 @@ -212,18 +230,17 @@ class ImportTest(unittest.TestCase): self.assertRaises(ZeroDivisionError, imp.reload, mod) # But we still expect the module to be in sys.modules. mod = sys.modules.get(TESTFN) - self.assertFalse(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_file_to_source(self): # check if __file__ points to the source file where available @@ -238,16 +255,26 @@ class ImportTest(unittest.TestCase): os.remove(source) del sys.modules[TESTFN] mod = __import__(TESTFN) - ext = mod.__file__[-4:] - self.assertTrue(ext in ('.pyc', '.pyo'), ext) + base, ext = os.path.splitext(mod.__file__) + self.assertIn(ext, ('.pyc', '.pyo')) finally: - sys.path.pop(0) + del sys.path[0] remove_files(TESTFN) if TESTFN in sys.modules: del sys.modules[TESTFN] + def test_import_name_binding(self): + # import x.y.z binds x in the current namespace. + import test as x + import test.support + self.assertIs(x, test, x.__name__) + self.assertTrue(hasattr(test.support, "__file__")) + + # import x.y.z as w binds z as w. + import test.support as y + self.assertIs(y, test.support, y.__name__) - def test_importbyfilename(self): + def test_import_by_filename(self): path = os.path.abspath(TESTFN) try: __import__(path) @@ -258,7 +285,7 @@ class ImportTest(unittest.TestCase): self.fail("import by path didn't raise an exception") -class TestPycRewriting(unittest.TestCase): +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). @@ -290,12 +317,10 @@ func_filename = 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() @@ -350,6 +375,7 @@ func_filename = func.__code__.co_filename mod = self.import_module() self.assertEqual(mod.constant.co_filename, foreign_code.co_filename) + class PathsTests(unittest.TestCase): SAMPLES = ('test', 'test\u00e4\u00f6\u00fc\u00df', 'test\u00e9\u00e8', 'test\u00b0\u00b3\u00b2') @@ -360,25 +386,23 @@ 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") - # http://bugs.python.org/issue3677 + # Regression test for http://bugs.python.org/issue3677. def _test_UNC_path(self): - f = open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') - f.write("testdata = 'test_trailing_slash'") - f.close() - #create the UNC path, like \\myhost\c$\foo\bar + with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f: + f.write("testdata = 'test_trailing_slash'") + # Create the UNC path, like \\myhost\c$\foo\bar. path = os.path.abspath(self.path) import socket hn = socket.gethostname() @@ -394,44 +418,73 @@ class PathsTests(unittest.TestCase): test_UNC_path = _test_UNC_path -class RelativeImport(unittest.TestCase): +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): # Note for mergers: the 'absolute' tests from the 2.x branch # are missing in Py3k because implicit relative imports are # a thing of the past + # + # Regression test for http://bugs.python.org/issue3221. def check_relative(): exec("from . import relimport", ns) + # Check relative import OK with __package__ and __name__ correct ns = dict(__package__='test', __name__='test.notarealmodule') check_relative() + # Check relative import OK with only __name__ wrong ns = dict(__package__='test', __name__='notarealpkg.notarealmodule') check_relative() + # Check relative import fails with only __package__ wrong ns = dict(__package__='foo', __name__='test.notarealmodule') self.assertRaises(SystemError, check_relative) + # Check relative import fails with __package__ and __name__ wrong ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule') self.assertRaises(SystemError, check_relative) + # Check relative import fails with package set to a non-string ns = dict(__package__=object()) self.assertRaises(ValueError, check_relative) + def test_absolute_import_without_future(self): + # If explicit relative import syntax is used, then do not try + # to perform an absolute import in the face of failure. + # Issue #7902. + with self.assertRaises(ImportError): + from .os import sep + self.fail("explicit relative import triggered an " + "implicit absolute import") + + +class RelativeImportFromImportlibTests(test_relative_imports.RelativeImports): + + def setUp(self): + self._importlib_util_flag = importlib_util.using___import__ + importlib_util.using___import__ = True + + def tearDown(self): + importlib_util.using___import__ = self._importlib_util_flag + + def test_main(verbose=None): - run_unittest(ImportTest, TestPycRewriting, PathsTests, RelativeImport) + run_unittest(ImportTests, + PycRewritingTests, PathsTests, RelativeImportTests, + RelativeImportFromImportlibTests) + 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() |