633 lines
23 KiB
Python
633 lines
23 KiB
Python
import builtins
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import errno
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import imp
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import marshal
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import os
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import py_compile
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import random
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import shutil
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import stat
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import sys
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import unittest
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from test.support import (
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EnvironmentVarGuard, TESTFN, check_warnings, forget, is_jython,
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make_legacy_pyc, rmtree, run_unittest, swap_attr, swap_item, temp_umask,
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unlink, unload)
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def remove_files(name):
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for f in (name + ".py",
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name + ".pyc",
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name + ".pyo",
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name + ".pyw",
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name + "$py.class"):
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unlink(f)
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try:
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shutil.rmtree('__pycache__')
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except OSError as error:
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if error.errno != errno.ENOENT:
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raise
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class ImportTests(unittest.TestCase):
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def tearDown(self):
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unload(TESTFN)
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setUp = tearDown
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def test_case_sensitivity(self):
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# Brief digression to test that import is case-sensitive: if we got
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# this far, we know for sure that "random" exists.
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try:
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import RAnDoM
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except ImportError:
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pass
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else:
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self.fail("import of RAnDoM should have failed (case mismatch)")
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def test_double_const(self):
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# Another brief digression to test the accuracy of manifest float
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# constants.
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from test import double_const # don't blink -- that *was* the test
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def test_import(self):
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def test_with_extension(ext):
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# The extension is normally ".py", perhaps ".pyw".
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source = TESTFN + ext
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pyo = TESTFN + ".pyo"
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if is_jython:
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pyc = TESTFN + "$py.class"
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else:
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pyc = TESTFN + ".pyc"
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with open(source, "w") as f:
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print("# This tests Python's ability to import a",
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ext, "file.", file=f)
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a = random.randrange(1000)
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b = random.randrange(1000)
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print("a =", a, file=f)
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print("b =", b, file=f)
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if TESTFN in sys.modules:
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del sys.modules[TESTFN]
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try:
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try:
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mod = __import__(TESTFN)
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except ImportError as err:
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self.fail("import from %s failed: %s" % (ext, err))
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self.assertEqual(mod.a, a,
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"module loaded (%s) but contents invalid" % mod)
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self.assertEqual(mod.b, b,
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"module loaded (%s) but contents invalid" % mod)
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finally:
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forget(TESTFN)
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unlink(source)
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unlink(pyc)
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unlink(pyo)
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sys.path.insert(0, os.curdir)
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try:
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test_with_extension(".py")
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if sys.platform.startswith("win"):
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for ext in [".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw"]:
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test_with_extension(ext)
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finally:
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del sys.path[0]
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@unittest.skipUnless(os.name == 'posix',
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"test meaningful only on posix systems")
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def test_execute_bit_not_copied(self):
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# Issue 6070: under posix .pyc files got their execute bit set if
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# the .py file had the execute bit set, but they aren't executable.
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with temp_umask(0o022):
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sys.path.insert(0, os.curdir)
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try:
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fname = TESTFN + os.extsep + "py"
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f = open(fname, 'w').close()
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os.chmod(fname, (stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH |
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stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH))
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__import__(TESTFN)
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fn = imp.cache_from_source(fname)
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if not os.path.exists(fn):
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self.fail("__import__ did not result in creation of "
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"either a .pyc or .pyo file")
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s = os.stat(fn)
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self.assertEqual(
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stat.S_IMODE(s.st_mode),
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stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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unload(TESTFN)
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def test_imp_module(self):
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# Verify that the imp module can correctly load and find .py files
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import imp, os
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# XXX (ncoghlan): It would be nice to use support.CleanImport
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# here, but that breaks because the os module registers some
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# handlers in copy_reg on import. Since CleanImport doesn't
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# revert that registration, the module is left in a broken
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# state after reversion. Reinitialising the module contents
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# and just reverting os.environ to its previous state is an OK
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# workaround
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orig_path = os.path
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orig_getenv = os.getenv
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with EnvironmentVarGuard():
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x = imp.find_module("os")
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new_os = imp.load_module("os", *x)
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self.assertIs(os, new_os)
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self.assertIs(orig_path, new_os.path)
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self.assertIsNot(orig_getenv, new_os.getenv)
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def test_module_with_large_stack(self, module='longlist'):
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# Regression test for http://bugs.python.org/issue561858.
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filename = module + '.py'
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# Create a file with a list of 65000 elements.
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with open(filename, 'w+') as f:
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f.write('d = [\n')
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for i in range(65000):
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f.write('"",\n')
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f.write(']')
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# Compile & remove .py file, we only need .pyc (or .pyo), but that
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# must be relocated to the PEP 3147 bytecode-only location.
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with open(filename, 'r') as f:
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py_compile.compile(filename)
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unlink(filename)
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make_legacy_pyc(filename)
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# Need to be able to load from current dir.
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sys.path.append('')
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# This used to crash.
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exec('import ' + module)
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# Cleanup.
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del sys.path[-1]
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unlink(filename + 'c')
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unlink(filename + 'o')
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def test_failing_import_sticks(self):
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source = TESTFN + ".py"
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with open(source, "w") as f:
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print("a = 1/0", file=f)
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# New in 2.4, we shouldn't be able to import that no matter how often
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# we try.
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sys.path.insert(0, os.curdir)
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if TESTFN in sys.modules:
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del sys.modules[TESTFN]
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try:
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for i in [1, 2, 3]:
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self.assertRaises(ZeroDivisionError, __import__, TESTFN)
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self.assertNotIn(TESTFN, sys.modules,
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"damaged module in sys.modules on %i try" % i)
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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def test_import_name_binding(self):
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# import x.y.z binds x in the current namespace
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import test as x
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import test.support
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self.assertTrue(x is test, x.__name__)
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self.assertTrue(hasattr(test.support, "__file__"))
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# import x.y.z as w binds z as w
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import test.support as y
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self.assertTrue(y is test.support, y.__name__)
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def test_import_initless_directory_warning(self):
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with warnings.catch_warnings():
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# Just a random non-package directory we always expect to be
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# somewhere in sys.path...
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warnings.simplefilter('error', ImportWarning)
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self.assertRaises(ImportWarning, __import__, "site-packages")
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def test_failing_reload(self):
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# A failing reload should leave the module object in sys.modules.
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source = TESTFN + os.extsep + "py"
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with open(source, "w") as f:
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f.write("a = 1\nb=2\n")
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sys.path.insert(0, os.curdir)
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try:
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mod = __import__(TESTFN)
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self.assertIn(TESTFN, sys.modules)
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self.assertEqual(mod.a, 1, "module has wrong attribute values")
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self.assertEqual(mod.b, 2, "module has wrong attribute values")
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# On WinXP, just replacing the .py file wasn't enough to
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# convince reload() to reparse it. Maybe the timestamp didn't
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# move enough. We force it to get reparsed by removing the
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# compiled file too.
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remove_files(TESTFN)
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# Now damage the module.
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with open(source, "w") as f:
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f.write("a = 10\nb=20//0\n")
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self.assertRaises(ZeroDivisionError, imp.reload, mod)
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# But we still expect the module to be in sys.modules.
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mod = sys.modules.get(TESTFN)
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self.assertIsNot(mod, None, "expected module to be in sys.modules")
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# We should have replaced a w/ 10, but the old b value should
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# stick.
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self.assertEqual(mod.a, 10, "module has wrong attribute values")
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self.assertEqual(mod.b, 2, "module has wrong attribute values")
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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unload(TESTFN)
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def test_file_to_source(self):
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# check if __file__ points to the source file where available
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source = TESTFN + ".py"
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with open(source, "w") as f:
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f.write("test = None\n")
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sys.path.insert(0, os.curdir)
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try:
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mod = __import__(TESTFN)
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self.assertTrue(mod.__file__.endswith('.py'))
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os.remove(source)
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del sys.modules[TESTFN]
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make_legacy_pyc(source)
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mod = __import__(TESTFN)
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base, ext = os.path.splitext(mod.__file__)
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self.assertIn(ext, ('.pyc', '.pyo'))
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finally:
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del sys.path[0]
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remove_files(TESTFN)
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if TESTFN in sys.modules:
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del sys.modules[TESTFN]
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def test_import_name_binding(self):
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# import x.y.z binds x in the current namespace.
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import test as x
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import test.support
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self.assertIs(x, test, x.__name__)
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self.assertTrue(hasattr(test.support, "__file__"))
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# import x.y.z as w binds z as w.
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import test.support as y
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self.assertIs(y, test.support, y.__name__)
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def test_import_initless_directory_warning(self):
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with check_warnings(('', ImportWarning)):
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# Just a random non-package directory we always expect to be
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# somewhere in sys.path...
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self.assertRaises(ImportError, __import__, "site-packages")
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def test_import_by_filename(self):
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path = os.path.abspath(TESTFN)
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with self.assertRaises(ImportError) as c:
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__import__(path)
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self.assertEqual("Import by filename is not supported.",
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c.exception.args[0])
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class PycRewritingTests(unittest.TestCase):
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# Test that the `co_filename` attribute on code objects always points
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# to the right file, even when various things happen (e.g. both the .py
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# and the .pyc file are renamed).
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module_name = "unlikely_module_name"
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module_source = """
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import sys
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code_filename = sys._getframe().f_code.co_filename
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module_filename = __file__
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constant = 1
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def func():
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pass
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func_filename = func.__code__.co_filename
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"""
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dir_name = os.path.abspath(TESTFN)
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file_name = os.path.join(dir_name, module_name) + os.extsep + "py"
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compiled_name = imp.cache_from_source(file_name)
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def setUp(self):
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self.sys_path = sys.path[:]
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self.orig_module = sys.modules.pop(self.module_name, None)
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os.mkdir(self.dir_name)
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with open(self.file_name, "w") as f:
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f.write(self.module_source)
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sys.path.insert(0, self.dir_name)
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def tearDown(self):
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sys.path[:] = self.sys_path
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if self.orig_module is not None:
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sys.modules[self.module_name] = self.orig_module
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else:
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unload(self.module_name)
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unlink(self.file_name)
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unlink(self.compiled_name)
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if os.path.exists(self.dir_name):
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shutil.rmtree(self.dir_name)
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def import_module(self):
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ns = globals()
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__import__(self.module_name, ns, ns)
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return sys.modules[self.module_name]
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def test_basics(self):
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mod = self.import_module()
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self.assertEqual(mod.module_filename, self.file_name)
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self.assertEqual(mod.code_filename, self.file_name)
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self.assertEqual(mod.func_filename, self.file_name)
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del sys.modules[self.module_name]
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mod = self.import_module()
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self.assertEqual(mod.module_filename, self.file_name)
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self.assertEqual(mod.code_filename, self.file_name)
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self.assertEqual(mod.func_filename, self.file_name)
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def test_incorrect_code_name(self):
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py_compile.compile(self.file_name, dfile="another_module.py")
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mod = self.import_module()
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self.assertEqual(mod.module_filename, self.file_name)
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self.assertEqual(mod.code_filename, self.file_name)
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self.assertEqual(mod.func_filename, self.file_name)
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def test_module_without_source(self):
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target = "another_module.py"
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py_compile.compile(self.file_name, dfile=target)
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os.remove(self.file_name)
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pyc_file = make_legacy_pyc(self.file_name)
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mod = self.import_module()
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self.assertEqual(mod.module_filename, pyc_file)
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self.assertEqual(mod.code_filename, target)
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self.assertEqual(mod.func_filename, target)
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def test_foreign_code(self):
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py_compile.compile(self.file_name)
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with open(self.compiled_name, "rb") as f:
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header = f.read(8)
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code = marshal.load(f)
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constants = list(code.co_consts)
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foreign_code = test_main.__code__
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pos = constants.index(1)
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constants[pos] = foreign_code
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code = type(code)(code.co_argcount, code.co_kwonlyargcount,
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code.co_nlocals, code.co_stacksize,
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code.co_flags, code.co_code, tuple(constants),
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code.co_names, code.co_varnames, code.co_filename,
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code.co_name, code.co_firstlineno, code.co_lnotab,
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code.co_freevars, code.co_cellvars)
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with open(self.compiled_name, "wb") as f:
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f.write(header)
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marshal.dump(code, f)
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mod = self.import_module()
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self.assertEqual(mod.constant.co_filename, foreign_code.co_filename)
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class PathsTests(unittest.TestCase):
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SAMPLES = ('test', 'test\u00e4\u00f6\u00fc\u00df', 'test\u00e9\u00e8',
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'test\u00b0\u00b3\u00b2')
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path = TESTFN
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def setUp(self):
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os.mkdir(self.path)
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self.syspath = sys.path[:]
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def tearDown(self):
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shutil.rmtree(self.path)
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sys.path[:] = self.syspath
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# Regression test for http://bugs.python.org/issue1293.
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def test_trailing_slash(self):
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with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f:
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f.write("testdata = 'test_trailing_slash'")
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sys.path.append(self.path+'/')
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mod = __import__("test_trailing_slash")
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self.assertEqual(mod.testdata, 'test_trailing_slash')
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unload("test_trailing_slash")
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# Regression test for http://bugs.python.org/issue3677.
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def _test_UNC_path(self):
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with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f:
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f.write("testdata = 'test_trailing_slash'")
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# Create the UNC path, like \\myhost\c$\foo\bar.
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path = os.path.abspath(self.path)
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import socket
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hn = socket.gethostname()
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drive = path[0]
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unc = "\\\\%s\\%s$"%(hn, drive)
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unc += path[2:]
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sys.path.append(path)
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mod = __import__("test_trailing_slash")
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self.assertEqual(mod.testdata, 'test_trailing_slash')
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unload("test_trailing_slash")
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if sys.platform == "win32":
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test_UNC_path = _test_UNC_path
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class RelativeImportTests(unittest.TestCase):
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def tearDown(self):
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unload("test.relimport")
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setUp = tearDown
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def test_relimport_star(self):
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# This will import * from .test_import.
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from . import relimport
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self.assertTrue(hasattr(relimport, "RelativeImportTests"))
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def test_issue3221(self):
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# Note for mergers: the 'absolute' tests from the 2.x branch
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# are missing in Py3k because implicit relative imports are
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# a thing of the past
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#
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# Regression test for http://bugs.python.org/issue3221.
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def check_relative():
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exec("from . import relimport", ns)
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# Check relative import OK with __package__ and __name__ correct
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ns = dict(__package__='test', __name__='test.notarealmodule')
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check_relative()
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# Check relative import OK with only __name__ wrong
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ns = dict(__package__='test', __name__='notarealpkg.notarealmodule')
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check_relative()
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# Check relative import fails with only __package__ wrong
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ns = dict(__package__='foo', __name__='test.notarealmodule')
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self.assertRaises(SystemError, check_relative)
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# Check relative import fails with __package__ and __name__ wrong
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ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule')
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self.assertRaises(SystemError, check_relative)
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# Check relative import fails with package set to a non-string
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ns = dict(__package__=object())
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self.assertRaises(ValueError, check_relative)
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class OverridingImportBuiltinTests(unittest.TestCase):
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def test_override_builtin(self):
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# Test that overriding builtins.__import__ can bypass sys.modules.
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import os
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def foo():
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import os
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return os
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self.assertEqual(foo(), os) # Quick sanity check.
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with swap_attr(builtins, "__import__", lambda *x: 5):
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self.assertEqual(foo(), 5)
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# Test what happens when we shadow __import__ in globals(); this
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# currently does not impact the import process, but if this changes,
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# other code will need to change, so keep this test as a tripwire.
|
|
with swap_item(globals(), "__import__", lambda *x: 5):
|
|
self.assertEqual(foo(), os)
|
|
|
|
|
|
class PycacheTests(unittest.TestCase):
|
|
# Test the various PEP 3147 related behaviors.
|
|
|
|
tag = imp.get_tag()
|
|
|
|
def _clean(self):
|
|
forget(TESTFN)
|
|
rmtree('__pycache__')
|
|
unlink(self.source)
|
|
|
|
def setUp(self):
|
|
self.source = TESTFN + '.py'
|
|
self._clean()
|
|
with open(self.source, 'w') as fp:
|
|
print('# This is a test file written by test_import.py', file=fp)
|
|
sys.path.insert(0, os.curdir)
|
|
|
|
def tearDown(self):
|
|
assert sys.path[0] == os.curdir, 'Unexpected sys.path[0]'
|
|
del sys.path[0]
|
|
self._clean()
|
|
|
|
def test_import_pyc_path(self):
|
|
self.assertFalse(os.path.exists('__pycache__'))
|
|
__import__(TESTFN)
|
|
self.assertTrue(os.path.exists('__pycache__'))
|
|
self.assertTrue(os.path.exists(os.path.join(
|
|
'__pycache__', '{}.{}.pyc'.format(TESTFN, self.tag))))
|
|
|
|
@unittest.skipUnless(os.name == 'posix',
|
|
"test meaningful only on posix systems")
|
|
def test_unwritable_directory(self):
|
|
# When the umask causes the new __pycache__ directory to be
|
|
# unwritable, the import still succeeds but no .pyc file is written.
|
|
with temp_umask(0o222):
|
|
__import__(TESTFN)
|
|
self.assertTrue(os.path.exists('__pycache__'))
|
|
self.assertFalse(os.path.exists(os.path.join(
|
|
'__pycache__', '{}.{}.pyc'.format(TESTFN, self.tag))))
|
|
|
|
def test_missing_source(self):
|
|
# With PEP 3147 cache layout, removing the source but leaving the pyc
|
|
# file does not satisfy the import.
|
|
__import__(TESTFN)
|
|
pyc_file = imp.cache_from_source(self.source)
|
|
self.assertTrue(os.path.exists(pyc_file))
|
|
os.remove(self.source)
|
|
forget(TESTFN)
|
|
self.assertRaises(ImportError, __import__, TESTFN)
|
|
|
|
def test_missing_source_legacy(self):
|
|
# Like test_missing_source() except that for backward compatibility,
|
|
# when the pyc file lives where the py file would have been (and named
|
|
# without the tag), it is importable. The __file__ of the imported
|
|
# module is the pyc location.
|
|
__import__(TESTFN)
|
|
# pyc_file gets removed in _clean() via tearDown().
|
|
pyc_file = make_legacy_pyc(self.source)
|
|
os.remove(self.source)
|
|
unload(TESTFN)
|
|
m = __import__(TESTFN)
|
|
self.assertEqual(m.__file__,
|
|
os.path.join(os.curdir, os.path.relpath(pyc_file)))
|
|
|
|
def test___cached__(self):
|
|
# Modules now also have an __cached__ that points to the pyc file.
|
|
m = __import__(TESTFN)
|
|
pyc_file = imp.cache_from_source(TESTFN + '.py')
|
|
self.assertEqual(m.__cached__, os.path.join(os.curdir, pyc_file))
|
|
|
|
def test___cached___legacy_pyc(self):
|
|
# Like test___cached__() except that for backward compatibility,
|
|
# when the pyc file lives where the py file would have been (and named
|
|
# without the tag), it is importable. The __cached__ of the imported
|
|
# module is the pyc location.
|
|
__import__(TESTFN)
|
|
# pyc_file gets removed in _clean() via tearDown().
|
|
pyc_file = make_legacy_pyc(self.source)
|
|
os.remove(self.source)
|
|
unload(TESTFN)
|
|
m = __import__(TESTFN)
|
|
self.assertEqual(m.__cached__,
|
|
os.path.join(os.curdir, os.path.relpath(pyc_file)))
|
|
|
|
def test_package___cached__(self):
|
|
# Like test___cached__ but for packages.
|
|
def cleanup():
|
|
shutil.rmtree('pep3147')
|
|
os.mkdir('pep3147')
|
|
self.addCleanup(cleanup)
|
|
# Touch the __init__.py
|
|
with open(os.path.join('pep3147', '__init__.py'), 'w'):
|
|
pass
|
|
with open(os.path.join('pep3147', 'foo.py'), 'w'):
|
|
pass
|
|
unload('pep3147.foo')
|
|
unload('pep3147')
|
|
m = __import__('pep3147.foo')
|
|
init_pyc = imp.cache_from_source(
|
|
os.path.join('pep3147', '__init__.py'))
|
|
self.assertEqual(m.__cached__, os.path.join(os.curdir, init_pyc))
|
|
foo_pyc = imp.cache_from_source(os.path.join('pep3147', 'foo.py'))
|
|
self.assertEqual(sys.modules['pep3147.foo'].__cached__,
|
|
os.path.join(os.curdir, foo_pyc))
|
|
|
|
def test_package___cached___from_pyc(self):
|
|
# Like test___cached__ but ensuring __cached__ when imported from a
|
|
# PEP 3147 pyc file.
|
|
def cleanup():
|
|
shutil.rmtree('pep3147')
|
|
os.mkdir('pep3147')
|
|
self.addCleanup(cleanup)
|
|
unload('pep3147.foo')
|
|
unload('pep3147')
|
|
# Touch the __init__.py
|
|
with open(os.path.join('pep3147', '__init__.py'), 'w'):
|
|
pass
|
|
with open(os.path.join('pep3147', 'foo.py'), 'w'):
|
|
pass
|
|
m = __import__('pep3147.foo')
|
|
unload('pep3147.foo')
|
|
unload('pep3147')
|
|
m = __import__('pep3147.foo')
|
|
init_pyc = imp.cache_from_source(
|
|
os.path.join('pep3147', '__init__.py'))
|
|
self.assertEqual(m.__cached__, os.path.join(os.curdir, init_pyc))
|
|
foo_pyc = imp.cache_from_source(os.path.join('pep3147', 'foo.py'))
|
|
self.assertEqual(sys.modules['pep3147.foo'].__cached__,
|
|
os.path.join(os.curdir, foo_pyc))
|
|
|
|
|
|
def test_main(verbose=None):
|
|
run_unittest(ImportTests, PycacheTests,
|
|
PycRewritingTests, PathsTests, RelativeImportTests,
|
|
OverridingImportBuiltinTests)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
# Test needs to be a package, so we can do relative imports.
|
|
from test.test_import import test_main
|
|
test_main()
|