fix: mock QTimer, improve timeout message

tests/unit_tests/conftest.py

@@ -2,7 +2,6 @@ from unittest import mock
 
 import pytest
 from pytestqt.exceptions import TimeoutError as QtBotTimeoutError
-from qtpy.QtCore import QTimer
 from qtpy.QtWidgets import QApplication
 
 from bec_widgets.cli.rpc.rpc_register import RPCRegister
@@ -10,22 +9,6 @@ from bec_widgets.qt_utils import error_popups
 from bec_widgets.utils import bec_dispatcher as bec_dispatcher_module
 
 
-class TestableQTimer(QTimer):
-    _instances = []
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        TestableQTimer._instances.append(self)
-
-    @classmethod
-    def check_all_stopped(cls, qtbot):
-        try:
-            qtbot.waitUntil(lambda: all(not timer.isActive() for timer in cls._instances))
-        except QtBotTimeoutError as exc:
-            raise TimeoutError("Failed to stop all timers") from exc
-        cls._instances = []
-
-
 @pytest.hookimpl(tryfirst=True, hookwrapper=True)
 def pytest_runtest_makereport(item, call):
     # execute all other hooks to obtain the report object
@@ -36,17 +19,16 @@ def pytest_runtest_makereport(item, call):
 
 
 @pytest.fixture(autouse=True)
-def qapplication(qtbot, request):  # pylint: disable=unused-argument
-    with mock.patch("qtpy.QtCore.QTimer", new=TestableQTimer):
-        yield
+def qapplication(qtbot, request, testable_qtimer_class):  # pylint: disable=unused-argument
+    yield
 
-        # if the test failed, we don't want to check for open widgets as
-        # it simply pollutes the output
-        if request.node.stash._storage.get("failed"):
-            print("Test failed, skipping cleanup checks")
-            return
+    # if the test failed, we don't want to check for open widgets as
+    # it simply pollutes the output
+    if request.node.stash._storage.get("failed"):
+        print("Test failed, skipping cleanup checks")
+        return
 
-        TestableQTimer.check_all_stopped(qtbot)
+    testable_qtimer_class.check_all_stopped(qtbot)
 
     qapp = QApplication.instance()
     qapp.processEvents()