Add missing test coverage for sirens (#53014)

tests/components/siren/test_init.py

@@ -1,7 +1,10 @@
 """The tests for the siren component."""
 from unittest.mock import MagicMock
 
-from homeassistant.components.siren import SirenEntity
+import pytest
+
+from homeassistant.components.siren import SirenEntity, process_turn_on_params
+from homeassistant.components.siren.const import SUPPORT_TONES
 
 
 class MockSirenEntity(SirenEntity):
@@ -9,9 +12,10 @@ class MockSirenEntity(SirenEntity):
 
     _attr_is_on = True
 
-    def __init__(self, supported_features: int = 0) -> None:
+    def __init__(self, supported_features=0, available_tones=None):
         """Initialize mock siren entity."""
         self._attr_supported_features = supported_features
+        self._attr_available_tones = available_tones
 
 
 async def test_sync_turn_on(hass):
@@ -34,3 +38,19 @@ async def test_sync_turn_off(hass):
     await siren.async_turn_off()
 
     assert siren.turn_off.called
+
+
+async def test_no_available_tones(hass):
+    """Test ValueError when siren advertises tones but has no available_tones."""
+    siren = MockSirenEntity(SUPPORT_TONES)
+    siren.hass = hass
+    with pytest.raises(ValueError):
+        process_turn_on_params(siren, {"tone": "test"})
+
+
+async def test_missing_tones(hass):
+    """Test ValueError when setting a tone that is missing from available_tones."""
+    siren = MockSirenEntity(SUPPORT_TONES, ["a", "b"])
+    siren.hass = hass
+    with pytest.raises(ValueError):
+        process_turn_on_params(siren, {"tone": "test"})