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Fix flaky bluetooth constant tests in test_socket.py for cross-platform compatibility#1

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Fix flaky bluetooth constant tests in test_socket.py for cross-platform compatibility#1
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devin/1776265251-fix-flaky-bluetooth-tests

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@devin-ai-integration devin-ai-integration Bot commented Apr 15, 2026

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Summary

Replace sys.platform-based guards with hasattr() checks in testBluetoothConstants to fix intermittent CI failures.

Problem

testBluetoothConstants in BasicBluetoothTest uses sys.platform checks to decide which bluetooth constants should exist. However, in Modules/socketmodule.c, these constants are conditionally compiled using #ifdef preprocessor guards based on compile-time header availability — not the runtime platform. A Linux CI runner that has AF_BLUETOOTH but was compiled without bluetooth/bluetooth.h (or specific protocol headers) will fail with AttributeError on constants like BTPROTO_HCI, SOL_BLUETOOTH, HCI_DATA_DIR, etc.

Fix

Replaced all sys.platform guards with hasattr(socket, ...) checks, matching the pattern already used within the same method for BT_PHY, BT_MODE, and BT_VOICE. Each constant group now has its own hasattr guard aligned with the corresponding #ifdef block in socketmodule.c:

  • BTPROTO_HCI / SOL_HCI — guarded by #ifdef BTPROTO_HCI
  • BTPROTO_L2CAP / SOL_L2CAP — guarded by #ifdef BTPROTO_L2CAP
  • BTPROTO_SCO / SOL_SCO — guarded by #ifdef BTPROTO_SCO
  • SOL_BLUETOOTH group (HCI_DEV_NONE, HCI_CHANNEL_*, BT_SECURITY, etc.) — guarded by #ifdef HAVE_BLUETOOTH_BLUETOOTH_H
  • HCI_TIME_STAMP, HCI_DATA_DIR, HCI_FILTER, L2CAP_LM — each has its own #ifdef in the C source, so each gets its own hasattr guard
  • BSD-specific socket options (SO_L2CAP_IMTU, SO_RFCOMM_MTU, etc.) — similarly split by their #ifdef guards

Review checklist

  • Verify that constant groupings within each hasattr block match the #ifdef groupings in Modules/socketmodule.c (e.g., SOL_HCI is always added alongside BTPROTO_HCI in C, so bundling them is correct)
  • Confirm the SOL_BLUETOOTH block — it bundles many constants under one check; all are under #ifdef HAVE_BLUETOOTH_BLUETOOTH_H in C
  • HCI_TIME_STAMP was moved out of the SOL_BLUETOOTH group into its own hasattr check (it has a separate #ifdef HCI_TIME_STAMP in C) — verify this is correct
  • L2CAP_LM group was moved out of the SOL_BLUETOOTH group (it has #ifdef L2CAP_LM in C) — verify this is correct

Link to Devin session: https://app.devin.ai/sessions/db273c93b8b14c5cb2ae9ee6c80f4716
Requested by: @Cameronthhacker


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Replace sys.platform-based checks with hasattr() checks in
testBluetoothConstants. The availability of bluetooth constants depends
on compile-time configuration (whether bluetooth headers were present),
not on the runtime platform. Using sys.platform caused intermittent
failures in CI environments where AF_BLUETOOTH was available but
specific bluetooth headers (e.g. bluetooth/bluetooth.h) were not
installed during compilation.

This aligns the test with the pattern already used for BT_PHY, BT_MODE,
and BT_VOICE constants within the same method, and matches the #ifdef
guards in Modules/socketmodule.c.

Co-Authored-By: cameron bica <bicacameron@gmail.com>
@devin-ai-integration

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✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.

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