deCONZ - create deconz_events through sensor platform (#26592)

* Move event creation into sensor platform where it belongs
* Fixed the weird failing test observed during device automation PR

tests/components/deconz/test_deconz_event.py

@@ -0,0 +1,60 @@
+"""Test deCONZ remote events."""
+from unittest.mock import Mock
+
+from homeassistant.components.deconz.deconz_event import CONF_DECONZ_EVENT, DeconzEvent
+from homeassistant.core import callback
+
+
+async def test_create_event(hass):
+    """Successfully created a deCONZ event."""
+    mock_remote = Mock()
+    mock_remote.name = "Name"
+
+    mock_gateway = Mock()
+    mock_gateway.hass = hass
+
+    event = DeconzEvent(mock_remote, mock_gateway)
+
+    assert event.event_id == "name"
+
+
+async def test_update_event(hass):
+    """Successfully update a deCONZ event."""
+    mock_remote = Mock()
+    mock_remote.name = "Name"
+
+    mock_gateway = Mock()
+    mock_gateway.hass = hass
+
+    event = DeconzEvent(mock_remote, mock_gateway)
+    mock_remote.changed_keys = {"state": True}
+
+    calls = []
+
+    @callback
+    def listener(event):
+        """Mock listener."""
+        calls.append(event)
+
+    unsub = hass.bus.async_listen(CONF_DECONZ_EVENT, listener)
+
+    event.async_update_callback()
+    await hass.async_block_till_done()
+
+    assert len(calls) == 1
+
+    unsub()
+
+
+async def test_remove_event(hass):
+    """Successfully update a deCONZ event."""
+    mock_remote = Mock()
+    mock_remote.name = "Name"
+
+    mock_gateway = Mock()
+    mock_gateway.hass = hass
+
+    event = DeconzEvent(mock_remote, mock_gateway)
+    event.async_will_remove_from_hass()
+
+    assert event._device is None