bpo-31904: Fix test_os.test_getcwd_long_path() failure for VxWorks (GH-20256)

Lib/test/test_os.py

@@ -116,6 +116,10 @@ class MiscTests(unittest.TestCase):
         # than MAX_PATH if long paths support is disabled:
         # see RtlAreLongPathsEnabled().
         min_len = 2000   # characters
+        # On VxWorks, PATH_MAX is defined as 1024 bytes. Creating a path
+        # longer than PATH_MAX will fail.
+        if sys.platform == 'vxworks':
+            min_len = 1000
         dirlen = 200     # characters
         dirname = 'python_test_dir_'
         dirname = dirname + ('a' * (dirlen - len(dirname)))

Misc/NEWS.d/next/Tests/2020-05-20-17-28-46.bpo-31904.yt83Ge.rst

@@ -0,0 +1 @@
+Fix os module failures for VxWorks RTOS.