Add significant Change support for camera (#105866)

homeassistant/components/camera/significant_change.py

@@ -0,0 +1,22 @@
+"""Helper to test significant Camera state changes."""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.core import HomeAssistant, callback
+
+
+@callback
+def async_check_significant_change(
+    hass: HomeAssistant,
+    old_state: str,
+    old_attrs: dict,
+    new_state: str,
+    new_attrs: dict,
+    **kwargs: Any,
+) -> bool | None:
+    """Test if state significantly changed."""
+    if old_state != new_state:
+        return True
+
+    return None

tests/components/camera/test_significant_change.py

@@ -0,0 +1,19 @@
+"""Test the Camera significant change platform."""
+from homeassistant.components.camera import STATE_IDLE, STATE_RECORDING
+from homeassistant.components.camera.significant_change import (
+    async_check_significant_change,
+)
+
+
+async def test_significant_change() -> None:
+    """Detect Camera significant changes."""
+    attrs = {}
+    assert not async_check_significant_change(
+        None, STATE_IDLE, attrs, STATE_IDLE, attrs
+    )
+    assert not async_check_significant_change(
+        None, STATE_IDLE, attrs, STATE_IDLE, {"dummy": "dummy"}
+    )
+    assert async_check_significant_change(
+        None, STATE_IDLE, attrs, STATE_RECORDING, attrs
+    )