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Add missing test for select.select() #7953

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youknowone merged 1 commit into from
May 24, 2026
+10 −0
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Add missing test for select.select() #7953

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10 changes: 10 additions & 0 deletions extra_tests/snippets/stdlib_select.py
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,16 @@ def fileno(self):
resource.setrlimit(resource.RLIMIT_NOFILE, (soft_max_fds, hard_max_fds))
sockets = [s for _ in range(TOO_MANY_SELECT_FDS // 2) for s in socket.socketpair()]
assert_raises(ValueError, select.select, sockets, [], [], 0)
if sys.platform != "win32":
# Try to overflow descriptor bit mask on *nix with a single item
max_fd = -1
max_fd_sock = None
sockets.reverse()
for sock in sockets:
if sock.fileno() > max_fd:
max_fd = sock.fileno()
max_fd_sock = sock
assert_raises(ValueError, select.select, [max_fd_sock], [], [], 0)
del sockets
a, b = socket.socketpair()
# CPython disallows this on *nix systems too.
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