Add smoke detector test to Matter binary sensor tests (#162638)

tests/components/matter/test_binary_sensor.py

@@ -596,3 +596,60 @@ async def test_thermostat_remote_sensing(
     state = hass.states.get("binary_sensor.mock_thermostat_occupancy_remote_sensing")
     assert state
     assert state.state == "on"
+
+
+@pytest.mark.parametrize("node_fixture", ["heiman_smoke_detector"])
+async def test_smoke_detector(
+    hass: HomeAssistant,
+    matter_client: MagicMock,
+    matter_node: MatterNode,
+) -> None:
+    """Test smoke detector sensor."""
+    smoke_state_attribute = clusters.SmokeCoAlarm.Attributes.SmokeState
+
+    # Test initial state (SmokeState = 0, kNormal)
+    state = hass.states.get("binary_sensor.smoke_sensor_smoke")
+    assert state
+    assert state.state == "off"
+
+    # Set SmokeState to kWarning (value 1)
+    set_node_attribute(
+        matter_node,
+        1,
+        smoke_state_attribute.cluster_id,
+        smoke_state_attribute.attribute_id,
+        1,
+    )
+    await trigger_subscription_callback(hass, matter_client)
+
+    state = hass.states.get("binary_sensor.smoke_sensor_smoke")
+    assert state
+    assert state.state == "on"
+
+    # Set SmokeState to kCritical (value 2)
+    set_node_attribute(
+        matter_node,
+        1,
+        smoke_state_attribute.cluster_id,
+        smoke_state_attribute.attribute_id,
+        2,
+    )
+    await trigger_subscription_callback(hass, matter_client)
+
+    state = hass.states.get("binary_sensor.smoke_sensor_smoke")
+    assert state
+    assert state.state == "on"
+
+    # Set SmokeState back to kNormal (value 0)
+    set_node_attribute(
+        matter_node,
+        1,
+        smoke_state_attribute.cluster_id,
+        smoke_state_attribute.attribute_id,
+        0,
+    )
+    await trigger_subscription_callback(hass, matter_client)
+
+    state = hass.states.get("binary_sensor.smoke_sensor_smoke")
+    assert state
+    assert state.state == "off"