Fix an issue with the switch preview in beta (#141617)

Fix an issue with the switch preview

homeassistant/components/template/switch.py

@@ -120,7 +120,7 @@ def rewrite_legacy_to_modern_conf(
     return switches
 
 
-def rewrite_options_to_moder_conf(option_config: dict[str, dict]) -> dict[str, dict]:
+def rewrite_options_to_modern_conf(option_config: dict[str, dict]) -> dict[str, dict]:
     """Rewrite option configuration to modern configuration."""
     option_config = {**option_config}
 
@@ -189,7 +189,7 @@ async def async_setup_entry(
     """Initialize config entry."""
     _options = dict(config_entry.options)
     _options.pop("template_type")
-    _options = rewrite_options_to_moder_conf(_options)
+    _options = rewrite_options_to_modern_conf(_options)
     validated_config = SWITCH_CONFIG_SCHEMA(_options)
     async_add_entities([SwitchTemplate(hass, validated_config, config_entry.entry_id)])
 
@@ -199,7 +199,8 @@ def async_create_preview_switch(
     hass: HomeAssistant, name: str, config: dict[str, Any]
 ) -> SwitchTemplate:
     """Create a preview switch."""
-    validated_config = SWITCH_CONFIG_SCHEMA(config | {CONF_NAME: name})
+    updated_config = rewrite_options_to_modern_conf(config)
+    validated_config = SWITCH_CONFIG_SCHEMA(updated_config | {CONF_NAME: name})
     return SwitchTemplate(hass, validated_config, None)
 
 

tests/components/template/test_switch.py

@@ -8,6 +8,7 @@ from syrupy.assertion import SnapshotAssertion
 from homeassistant.components import switch, template
 from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
 from homeassistant.components.template.switch import rewrite_legacy_to_modern_conf
+from homeassistant.config_entries import SOURCE_USER
 from homeassistant.const import (
     ATTR_ENTITY_ID,
     SERVICE_TURN_OFF,
@@ -17,6 +18,7 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
 )
 from homeassistant.core import CoreState, HomeAssistant, ServiceCall, State
+from homeassistant.data_entry_flow import FlowResultType
 from homeassistant.helpers import device_registry as dr, entity_registry as er
 from homeassistant.helpers.template import Template
 from homeassistant.setup import async_setup_component
@@ -29,6 +31,7 @@ from tests.common import (
     mock_component,
     mock_restore_cache,
 )
+from tests.typing import WebSocketGenerator
 
 TEST_OBJECT_ID = "test_template_switch"
 TEST_ENTITY_ID = f"switch.{TEST_OBJECT_ID}"
@@ -279,6 +282,46 @@ async def test_setup_config_entry(
     assert state == snapshot
 
 
+@pytest.mark.parametrize("state_key", ["value_template", "state"])
+async def test_flow_preview(
+    hass: HomeAssistant,
+    state_key: str,
+    hass_ws_client: WebSocketGenerator,
+) -> None:
+    """Test the config flow preview."""
+    client = await hass_ws_client(hass)
+
+    result = await hass.config_entries.flow.async_init(
+        template.DOMAIN, context={"source": SOURCE_USER}
+    )
+    assert result["type"] is FlowResultType.MENU
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {"next_step_id": SWITCH_DOMAIN},
+    )
+    await hass.async_block_till_done()
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == SWITCH_DOMAIN
+    assert result["errors"] is None
+    assert result["preview"] == "template"
+
+    await client.send_json_auto_id(
+        {
+            "type": "template/start_preview",
+            "flow_id": result["flow_id"],
+            "flow_type": "config_flow",
+            "user_input": {"name": "My template", state_key: "{{ 'on' }}"},
+        }
+    )
+    msg = await client.receive_json()
+    assert msg["success"]
+    assert msg["result"] is None
+
+    msg = await client.receive_json()
+    assert msg["event"]["state"] == "on"
+
+
 @pytest.mark.parametrize(
     ("count", "state_template"), [(1, "{{ states.switch.test_state.state }}")]
 )