add some tests

pyproject.toml

@@ -49,8 +49,8 @@ flake8 = "^5.0.0"
 isort = "^5.13.2"
 
 [tool.poetry.group.test.dependencies]
-pytest = "^7.0.0"
-pytest-asyncio = "^0.19.0"
+pytest = "^8.2.1"
+pytest-asyncio = "^0.23.7"
 pytest-cov = "^3.0.0 "
 
 [build-system]

tests/bleak/backends/winrt/test_utils.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python
+
+"""Tests for `bleak.backends.winrt.util` package."""
+
+import sys
+
+import pytest
+
+if not sys.platform.startswith("win"):
+    pytest.skip("skipping windows-only tests", allow_module_level=True)
+
+from ctypes import windll, wintypes
+
+from bleak.backends.winrt.util import _check_hresult, assert_mta
+from bleak.exc import BleakError
+
+# https://learn.microsoft.com/en-us/windows/win32/api/objbase/ne-objbase-coinit
+COINIT_MULTITHREADED = 0x0
+COINIT_APARTMENTTHREADED = 0x2
+
+_CoInitializeEx = windll.ole32.CoInitializeEx
+_CoInitializeEx.restype = wintypes.LONG
+_CoInitializeEx.argtypes = [wintypes.LPVOID, wintypes.DWORD]
+_CoInitializeEx.errcheck = _check_hresult
+
+# https://learn.microsoft.com/en-us/windows/win32/api/combaseapi/nf-combaseapi-couninitialize
+_CoUninitialize = windll.ole32.CoUninitialize
+_CoUninitialize.restype = None
+_CoUninitialize.argtypes = []
+
+
+@pytest.mark.asyncio
+async def test_assert_mta_no_init():
+    """Test device_path_from_characteristic_path."""
+
+    await assert_mta()
+
+
+@pytest.mark.asyncio
+async def test_assert_mta_init_mta():
+    """Test device_path_from_characteristic_path."""
+
+    _CoInitializeEx(None, COINIT_MULTITHREADED)
+
+    try:
+        await assert_mta()
+        assert hasattr(assert_mta, "_allowed")
+    finally:
+        _CoUninitialize()
+
+
+@pytest.mark.asyncio
+async def test_assert_mta_init_sta():
+    """Test device_path_from_characteristic_path."""
+
+    _CoInitializeEx(None, COINIT_APARTMENTTHREADED)
+
+    try:
+        with pytest.raises(
+            BleakError,
+            match="Thread is configured for Windows GUI but callbacks are not working.",
+        ):
+            await assert_mta()
+    finally:
+        _CoUninitialize()