Fix test_os on Windows

Author: vstinner

Lib/test/test_os/test_dirfd.py

@@ -4,14 +4,18 @@
 
 import errno
 import os
-import posix
 import stat
 import time
 import unittest
 from contextlib import contextmanager
 from test import support
 from test.support import os_helper
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 
 class TestPosixDirFd(unittest.TestCase):
     count = 0

Lib/test/test_os/test_dirs.py

@@ -5,7 +5,6 @@
 import errno
 import itertools
 import os
-import posix
 import shutil
 import stat
 import subprocess
@@ -16,6 +15,11 @@
 from test.support import os_helper
 from .utils import create_file
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 
 class WalkTests(unittest.TestCase):
     """Tests for os.walk()."""

Lib/test/test_os/test_encoding.py

@@ -112,7 +112,7 @@ def test_bad_fd(self):
             (hasattr(locale, 'nl_langinfo') and hasattr(locale, 'CODESET'))),
             'test requires a tty and either Windows or nl_langinfo(CODESET)')
     def test_device_encoding(self):
-        ncoding = os.device_encoding(0)
+        encoding = os.device_encoding(0)
         self.assertIsNotNone(encoding)
         self.assertTrue(codecs.lookup(encoding))
 

Lib/test/test_os/test_environ.py

@@ -3,7 +3,6 @@
 """
 
 import os
-import posix
 import subprocess
 import sys
 import unittest
@@ -13,6 +12,11 @@
 from test.support import os_helper
 from test.support import unix_shell
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 
 class EnvironTests(mapping_tests.BasicTestMappingProtocol):
     """check that os.environ object conform to mapping protocol"""

Lib/test/test_os/test_fd.py

@@ -5,7 +5,6 @@
 import errno
 import itertools
 import os
-import posix
 import select
 import struct
 import sys
@@ -14,6 +13,11 @@
 from test import support
 from test.support import os_helper
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 
 @unittest.skipIf(support.is_wasi, "Cannot create invalid FD on WASI.")
 class TestInvalidFD(unittest.TestCase):

Lib/test/test_os/test_file.py

@@ -4,13 +4,17 @@
 
 import errno
 import os
-import posix
 import sys
 import unittest
 from test import support
 from test.support import os_helper
 from .utils import create_file
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 try:
     import fcntl
 except ImportError:

Lib/test/test_os/test_file_attrs.py

@@ -7,7 +7,6 @@
 import fractions
 import os
 import platform
-import posix
 import stat
 import sys
 import tempfile
@@ -16,6 +15,11 @@
 from test.support import os_helper
 from .utils import create_file
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 try:
     import pwd
     all_users = [u.pw_uid for u in pwd.getpwall()]

Lib/test/test_os/test_link.py

@@ -3,14 +3,18 @@
 """
 
 import os
-import posix
 import shutil
 import sys
 import unittest
 from test.support import os_helper
 from test.support.os_helper import FakePath
 from .utils import create_file
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 
 @unittest.skipUnless(hasattr(os, 'link'), 'requires os.link')
 class LinkTests(unittest.TestCase):

Lib/test/test_os/test_macos_weaklink.py

@@ -2,14 +2,20 @@
 Test macOS weak linking.
 """
 
-import os
-import posix
 import sys
 import unittest
+if sys.platform != "darwin":
+    raise unittest.SkipTest("test weak linking on macOS")
+
+import os
 from test.support import os_helper
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
+
 
-@unittest.skipUnless(sys.platform == "darwin", "test weak linking on macOS")
 class TestPosixWeaklinking(unittest.TestCase):
     # These test cases verify that weak linking support on macOS works
     # as expected. These cases only test new behaviour introduced by weak linking,

Lib/test/test_os/test_process.py

@@ -6,7 +6,6 @@
 import errno
 import os
 import platform
-import posix
 import signal
 import stat
 import subprocess
@@ -22,6 +21,10 @@
 from test.support.script_helper import assert_python_ok
 from .utils import requires_sched
 
+try:
+    import posix
+except ImportError:
+    import nt as posix
 try:
     import _testcapi
 except ImportError: