Add Select entity component platform (#51849)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/components/demo/__init__.py

@@ -20,6 +20,7 @@ COMPONENTS_WITH_CONFIG_ENTRY_DEMO_PLATFORM = [
     "lock",
     "media_player",
     "number",
+    "select",
     "sensor",
     "switch",
     "vacuum",

homeassistant/components/demo/select.py

@@ -0,0 +1,80 @@
+"""Demo platform that offers a fake select entity."""
+from __future__ import annotations
+
+from homeassistant.components.select import SelectEntity
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import DEVICE_DEFAULT_NAME
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+
+from . import DOMAIN
+
+
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType = None,
+) -> None:
+    """Set up the demo Select entity."""
+    async_add_entities(
+        [
+            DemoSelect(
+                unique_id="speed",
+                name="Speed",
+                icon="mdi:speedometer",
+                device_class="demo__speed",
+                current_option="ridiculous_speed",
+                options=[
+                    "light_speed",
+                    "ridiculous_speed",
+                    "ludicrous_speed",
+                ],
+            ),
+        ]
+    )
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up the Demo config entry."""
+    await async_setup_platform(hass, {}, async_add_entities)
+
+
+class DemoSelect(SelectEntity):
+    """Representation of a demo select entity."""
+
+    _attr_should_poll = False
+
+    def __init__(
+        self,
+        unique_id: str,
+        name: str,
+        icon: str,
+        device_class: str | None,
+        current_option: str | None,
+        options: list[str],
+    ) -> None:
+        """Initialize the Demo select entity."""
+        self._attr_unique_id = unique_id
+        self._attr_name = name or DEVICE_DEFAULT_NAME
+        self._attr_current_option = current_option
+        self._attr_icon = icon
+        self._attr_device_class = device_class
+        self._attr_options = options
+        self._attr_device_info = {
+            "identifiers": {(DOMAIN, unique_id)},
+            "name": name,
+        }
+
+    async def async_select_option(self, option: str) -> None:
+        """Update the current selected option."""
+        if option not in self.options:
+            raise ValueError(f"Invalid option for {self.entity_id}: {option}")
+
+        self._attr_current_option = option
+        self.async_write_ha_state()

homeassistant/components/demo/strings.select.json

@@ -0,0 +1,9 @@
+{
+  "state": {
+    "demo__speed": {
+      "light_speed": "Light Speed",
+      "ludicrous_speed": "Ludicrous Speed",
+      "ridiculous_speed": "Ridiculous Speed"
+    }
+  }
+}

homeassistant/components/demo/translations/select.en.json

@@ -0,0 +1,9 @@
+{
+    "state": {
+        "demo__speed": {
+            "light_speed": "Light Speed",
+            "ludicrous_speed": "Ludicrous Speed",
+            "ridiculous_speed": "Ridiculous Speed"
+        }
+    }
+}