Fix tests when run on pytest 7.2, related to mark inheritance: pytest…

…-dev/pytest#7792

miio/integrations/airpurifier/zhimi/tests/test_airfresh.py

@@ -58,6 +58,11 @@ def __init__(self, *args, **kwargs):
 
 @pytest.fixture(scope="class")
 def airfresh(request):
+    # pytest 7.2.0 changed the handling of marks, see https://github.com/pytest-dev/pytest/issues/7792
+    # the result is subclass device attribute to be overridden for TestAirFreshVA4,
+    # this hack checks if we already have a device to avoid doing that
+    if getattr(request.cls, "device", None) is not None:
+        return
     request.cls.device = DummyAirFresh()
     # TODO add ability to test on a real device