Improve test coverage for zwave_js (#93262)

tests/components/zwave_js/test_helpers.py

@@ -0,0 +1,24 @@
+"""Test the Z-Wave JS helpers module."""
+from homeassistant.components.zwave_js.helpers import (
+    async_get_node_status_sensor_entity_id,
+    async_get_nodes_from_area_id,
+)
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import area_registry as ar, device_registry as dr
+
+
+async def test_async_get_node_status_sensor_entity_id(hass: HomeAssistant) -> None:
+    """Test async_get_node_status_sensor_entity_id for non zwave_js device."""
+    dev_reg = dr.async_get(hass)
+    device = dev_reg.async_get_or_create(
+        config_entry_id="123",
+        identifiers={("test", "test")},
+    )
+    assert async_get_node_status_sensor_entity_id(hass, device.id) is None
+
+
+async def test_async_get_nodes_from_area_id(hass: HomeAssistant) -> None:
+    """Test async_get_nodes_from_area_id."""
+    area_reg = ar.async_get(hass)
+    area = area_reg.async_create("test")
+    assert not async_get_nodes_from_area_id(hass, area.id)