Correct Modbus platform cover restore state (#50421)

* Correct cover restore state.

* Change mock usage.

* Add states to convert.

homeassistant/components/modbus/cover.py

@@ -12,6 +12,12 @@ from homeassistant.const import (
     CONF_NAME,
     CONF_SCAN_INTERVAL,
     CONF_SLAVE,
+    STATE_CLOSED,
+    STATE_CLOSING,
+    STATE_OPEN,
+    STATE_OPENING,
+    STATE_UNAVAILABLE,
+    STATE_UNKNOWN,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.event import async_track_time_interval
@@ -105,7 +111,15 @@ class ModbusCover(CoverEntity, RestoreEntity):
         """Handle entity which will be added."""
         state = await self.async_get_last_state()
         if state:
-            self._value = state.state
+            convert = {
+                STATE_CLOSED: self._state_closed,
+                STATE_CLOSING: self._state_closing,
+                STATE_OPENING: self._state_opening,
+                STATE_OPEN: self._state_open,
+                STATE_UNAVAILABLE: None,
+                STATE_UNKNOWN: None,
+            }
+            self._value = convert[state.state]
 
         async_track_time_interval(self.hass, self.async_update, self._scan_interval)
 

tests/components/modbus/test_modbus_cover.py

@@ -8,6 +8,11 @@ from homeassistant.components.modbus.const import (
     CALL_TYPE_COIL,
     CALL_TYPE_REGISTER_HOLDING,
     CONF_REGISTER,
+    CONF_STATE_CLOSED,
+    CONF_STATE_CLOSING,
+    CONF_STATE_OPEN,
+    CONF_STATE_OPENING,
+    CONF_STATUS_REGISTER,
     CONF_STATUS_REGISTER_TYPE,
 )
 from homeassistant.const import (
@@ -16,11 +21,16 @@ from homeassistant.const import (
     CONF_SCAN_INTERVAL,
     CONF_SLAVE,
     STATE_CLOSED,
+    STATE_CLOSING,
     STATE_OPEN,
+    STATE_OPENING,
 )
+from homeassistant.core import State
 
 from .conftest import ReadResult, base_config_test, base_test, prepare_service_update
 
+from tests.common import mock_restore_cache
+
 
 @pytest.mark.parametrize(
     "do_options",
@@ -202,3 +212,37 @@ async def test_service_cover_update(hass, mock_pymodbus):
         "homeassistant", "update_entity", {"entity_id": entity_id}, blocking=True
     )
     assert hass.states.get(entity_id).state == STATE_OPEN
+
+
+@pytest.mark.parametrize(
+    "state", [STATE_CLOSED, STATE_CLOSING, STATE_OPENING, STATE_OPEN]
+)
+async def test_restore_state_cover(hass, state):
+    """Run test for cover restore state."""
+
+    entity_id = "cover.test"
+    cover_name = "test"
+    config = {
+        CONF_NAME: cover_name,
+        CALL_TYPE_COIL: 1234,
+        CONF_STATE_OPEN: 1,
+        CONF_STATE_CLOSED: 0,
+        CONF_STATE_OPENING: 2,
+        CONF_STATE_CLOSING: 3,
+        CONF_STATUS_REGISTER: 1234,
+        CONF_STATUS_REGISTER_TYPE: CALL_TYPE_REGISTER_HOLDING,
+    }
+    mock_restore_cache(
+        hass,
+        (State(f"{entity_id}", state),),
+    )
+    await base_config_test(
+        hass,
+        config,
+        cover_name,
+        COVER_DOMAIN,
+        CONF_COVERS,
+        None,
+        method_discovery=True,
+    )
+    assert hass.states.get(entity_id).state == state