use a tmp dir instead of the default ~/mss (#2959)

Author: ReimarBauer

tests/fixtures.py

@@ -71,7 +71,12 @@ def close_remaining_widgets():
 
 
 @pytest.fixture
-def qtbot(qtbot, fail_if_open_message_boxes_left, close_remaining_widgets):
+def msui_configs(tmp_path):
+    modify_config_file({"mss_dir": str(tmp_path)})
+
+
+@pytest.fixture
+def qtbot(qtbot, fail_if_open_message_boxes_left, close_remaining_widgets, msui_configs):
     """Fixture that re-defines the qtbot fixture from pytest-qt with additional checks."""
     yield qtbot
     # Wait for a while after the requesting test has finished. At time of writing this