Add condition selector for blueprint (#96350)

* Add condition selector for blueprint

* Add tests and validation

* Update comment

homeassistant/helpers/selector.py

@@ -453,6 +453,27 @@ class ColorTempSelector(Selector[ColorTempSelectorConfig]):
         return value
 
 
+class ConditionSelectorConfig(TypedDict):
+    """Class to represent an action selector config."""
+
+
+@SELECTORS.register("condition")
+class ConditionSelector(Selector[ConditionSelectorConfig]):
+    """Selector of an condition sequence (script syntax)."""
+
+    selector_type = "condition"
+
+    CONFIG_SCHEMA = vol.Schema({})
+
+    def __init__(self, config: ConditionSelectorConfig | None = None) -> None:
+        """Instantiate a selector."""
+        super().__init__(config)
+
+    def __call__(self, data: Any) -> Any:
+        """Validate the passed selection."""
+        return vol.Schema(cv.CONDITIONS_SCHEMA)(data)
+
+
 class ConfigEntrySelectorConfig(TypedDict, total=False):
     """Class to represent a config entry selector config."""
 

tests/helpers/test_selector.py

@@ -1017,3 +1017,29 @@ def test_conversation_agent_selector_schema(
 ) -> None:
     """Test conversation agent selector."""
     _test_selector("conversation_agent", schema, valid_selections, invalid_selections)
+
+
+@pytest.mark.parametrize(
+    ("schema", "valid_selections", "invalid_selections"),
+    (
+        (
+            {},
+            (
+                [
+                    {
+                        "condition": "numeric_state",
+                        "entity_id": ["sensor.temperature"],
+                        "below": 20,
+                    }
+                ],
+                [],
+            ),
+            ("abc"),
+        ),
+    ),
+)
+def test_condition_selector_schema(
+    schema, valid_selections, invalid_selections
+) -> None:
+    """Test condition sequence selector."""
+    _test_selector("condition", schema, valid_selections, invalid_selections)