Issue #11811: Factor out detection of IPv6 support on the current host
and make it available as `test.support.IPV6_ENABLED`. Patch by
Charles-François Natali.
diff --git a/Lib/test/support.py b/Lib/test/support.py
index fbf6de4..800f0e5 100644
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -33,16 +33,15 @@
"verbose", "use_resources", "max_memuse", "record_original_stdout",
"get_original_stdout", "unload", "unlink", "rmtree", "forget",
"is_resource_enabled", "requires", "find_unused_port", "bind_port",
- "is_jython", "TESTFN", "HOST", "SAVEDCWD", "temp_cwd",
+ "IPV6_ENABLED", "is_jython", "TESTFN", "HOST", "SAVEDCWD", "temp_cwd",
"findfile", "sortdict", "check_syntax_error", "open_urlresource",
"check_warnings", "CleanImport", "EnvironmentVarGuard",
- "TransientResource", "captured_output", "captured_stdout",
- "time_out", "socket_peer_reset", "ioerror_peer_reset",
- "run_with_locale", 'temp_umask', "transient_internet",
- "set_memlimit", "bigmemtest", "bigaddrspacetest", "BasicTestRunner",
- "run_unittest", "run_doctest", "threading_setup", "threading_cleanup",
- "reap_children", "cpython_only", "check_impl_detail", "get_attribute",
- "swap_item", "swap_attr", "requires_IEEE_754",
+ "TransientResource", "captured_output", "captured_stdout", "time_out",
+ "socket_peer_reset", "ioerror_peer_reset", "run_with_locale", 'temp_umask',
+ "transient_internet", "set_memlimit", "bigmemtest", "bigaddrspacetest",
+ "BasicTestRunner", "run_unittest", "run_doctest", "threading_setup",
+ "threading_cleanup", "reap_children", "cpython_only", "check_impl_detail",
+ "get_attribute", "swap_item", "swap_attr", "requires_IEEE_754",
"TestHandler", "Matcher", "can_symlink", "skip_unless_symlink"]
@@ -381,6 +380,21 @@
port = sock.getsockname()[1]
return port
+def _is_ipv6_enabled():
+ """Check whether IPv6 is enabled on this host."""
+ if socket.has_ipv6:
+ try:
+ sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
+ sock.bind(('::1', 0))
+ except (socket.error, socket.gaierror):
+ pass
+ else:
+ sock.close()
+ return True
+ return False
+
+IPV6_ENABLED = _is_ipv6_enabled()
+
# decorator for skipping tests on non-IEEE 754 platforms
requires_IEEE_754 = unittest.skipUnless(
float.__getformat__("double").startswith("IEEE"),