Issue #20667: test_asyncio: Skip KqueueEventLoopTests.test_read_pty_output() on

OpenBSD older than 5.5

Lib/test/support/__init__.py

@@ -78,6 +78,7 @@ __all__ = [
     "create_empty_file", "can_symlink", "fs_is_case_insensitive",
     # unittest
     "is_resource_enabled", "requires", "requires_freebsd_version",
+    "requires_openbsd_version",
     "requires_linux_version", "requires_mac_ver", "check_syntax_error",
     "TransientResource", "time_out", "socket_peer_reset", "ioerror_peer_reset",
     "transient_internet", "BasicTestRunner", "run_unittest", "run_doctest",
@@ -467,6 +468,15 @@ def requires_freebsd_version(*min_version):
     """
     return _requires_unix_version('FreeBSD', min_version)
 
+def requires_openbsd_version(*min_version):
+    """Decorator raising SkipTest if the OS is OpenBSD and the OpenBSD version
+    is less than `min_version`.
+
+    For example, @requires_freebsd_version(5, 4) raises SkipTest if the FreeBSD
+    version is less than 5.4.
+    """
+    return _requires_unix_version('OpenBSD', min_version)
+
 def requires_linux_version(*min_version):
     """Decorator raising SkipTest if the OS is Linux and the Linux version is
     less than `min_version`.

Lib/test/test_asyncio/test_events.py

@@ -1622,6 +1622,9 @@ else:
             # kqueue doesn't support character devices (PTY) on Mac OS X older
             # than 10.9 (Maverick)
             @support.requires_mac_ver(10, 9)
+            # Issue #20667: KqueueEventLoopTests.test_read_pty_output()
+            # hangs on OpenBSD 5.4
+            @support.requires_openbsd_version(5, 5)
             def test_read_pty_output(self):
                 super().test_read_pty_output()