Use debouncer in mysensors (#84638)

* Use debouncer in mysensors

* Clean cover tests

* Fix debouncer mocking

* Follow typing

tests/components/mysensors/conftest.py

@@ -144,8 +144,26 @@ async def integration_fixture(
     """Set up the mysensors integration with a config entry."""
     config: dict[str, Any] = {}
     config_entry.add_to_hass(hass)
+    with patch(
+        "homeassistant.components.mysensors.device.Debouncer", autospec=True
+    ) as debouncer_class:
+
+        def debouncer(
+            *args: Any, function: Callable | None = None, **kwargs: Any
+        ) -> MagicMock:
+            """Mock the debouncer."""
+
+            async def call_debouncer():
+                """Mock call to debouncer."""
+                if function is not None:
+                    function()
+
+            debounce_instance = MagicMock()
+            debounce_instance.async_call.side_effect = call_debouncer
+            return debounce_instance
+
+        debouncer_class.side_effect = debouncer
 
-    with patch("homeassistant.components.mysensors.device.UPDATE_DELAY", new=0):
         await async_setup_component(hass, DOMAIN, config)
         await hass.async_block_till_done()
         yield config_entry