Add _attr class attributes to TextToSpeechEntity (#115684)

homeassistant/components/tts/__init__.py

@@ -2,11 +2,10 @@
 
 from __future__ import annotations
 
-from abc import abstractmethod
 import asyncio
 from collections.abc import Mapping
 from datetime import datetime
-from functools import partial
+from functools import cached_property, partial
 import hashlib
 from http import HTTPStatus
 import io
@@ -373,12 +372,25 @@ async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     return await component.async_unload_entry(entry)
 
 
-class TextToSpeechEntity(RestoreEntity):
+CACHED_PROPERTIES_WITH_ATTR_ = {
+    "default_language",
+    "default_options",
+    "supported_languages",
+    "supported_options",
+}
+
+
+class TextToSpeechEntity(RestoreEntity, cached_properties=CACHED_PROPERTIES_WITH_ATTR_):
     """Represent a single TTS engine."""
 
     _attr_should_poll = False
     __last_tts_loaded: str | None = None
 
+    _attr_default_language: str
+    _attr_default_options: Mapping[str, Any] | None = None
+    _attr_supported_languages: list[str]
+    _attr_supported_options: list[str] | None = None
+
     @property
     @final
     def state(self) -> str | None:
@@ -387,25 +399,25 @@ class TextToSpeechEntity(RestoreEntity):
             return None
         return self.__last_tts_loaded
 
-    @property
-    @abstractmethod
+    @cached_property
     def supported_languages(self) -> list[str]:
         """Return a list of supported languages."""
+        return self._attr_supported_languages
 
-    @property
-    @abstractmethod
+    @cached_property
     def default_language(self) -> str:
         """Return the default language."""
+        return self._attr_default_language
 
-    @property
+    @cached_property
     def supported_options(self) -> list[str] | None:
         """Return a list of supported options like voice, emotions."""
-        return None
+        return self._attr_supported_options
 
-    @property
+    @cached_property
     def default_options(self) -> Mapping[str, Any] | None:
         """Return a mapping with the default options."""
-        return None
+        return self._attr_default_options
 
     @callback
     def async_get_supported_voices(self, language: str) -> list[Voice] | None:
@@ -415,6 +427,18 @@ class TextToSpeechEntity(RestoreEntity):
     async def async_internal_added_to_hass(self) -> None:
         """Call when the entity is added to hass."""
         await super().async_internal_added_to_hass()
+        try:
+            _ = self.default_language
+        except AttributeError as err:
+            raise AttributeError(
+                "TTS entities must either set the '_attr_default_language' attribute or override the 'default_language' property"
+            ) from err
+        try:
+            _ = self.supported_languages
+        except AttributeError as err:
+            raise AttributeError(
+                "TTS entities must either set the '_attr_supported_languages' attribute or override the 'supported_languages' property"
+            ) from err
         state = await self.async_get_last_state()
         if (
             state is not None

tests/components/tts/test_init.py

@@ -47,15 +47,8 @@ ORIG_WRITE_TAGS = tts.SpeechManager.write_tags
 class DefaultEntity(tts.TextToSpeechEntity):
     """Test entity."""
 
-    @property
-    def supported_languages(self) -> list[str]:
-        """Return a list of supported languages."""
-        return SUPPORT_LANGUAGES
-
-    @property
-    def default_language(self) -> str:
-        """Return the default language."""
-        return DEFAULT_LANG
+    _attr_supported_languages = SUPPORT_LANGUAGES
+    _attr_default_language = DEFAULT_LANG
 
 
 async def test_default_entity_attributes() -> None:
@@ -523,10 +516,7 @@ class MockProviderWithDefaults(MockProvider):
 class MockEntityWithDefaults(MockTTSEntity):
     """Mock entity with default options."""
 
-    @property
-    def default_options(self):
-        """Return a mapping with the default options."""
-        return {"voice": "alex"}
+    _attr_default_options = {"voice": "alex"}
 
 
 @pytest.mark.parametrize(
@@ -1758,3 +1748,93 @@ async def test_async_convert_audio_error(hass: HomeAssistant) -> None:
     with pytest.raises(RuntimeError):
         # Simulate a bad WAV file
         await tts.async_convert_audio(hass, "wav", bytes(0), "mp3")
+
+
+async def test_ttsentity_subclass_properties(
+    hass: HomeAssistant, caplog: pytest.LogCaptureFixture
+) -> None:
+    """Test for errors when subclasses of the TextToSpeechEntity are missing required properties."""
+
+    class TestClass1(tts.TextToSpeechEntity):
+        _attr_default_language = DEFAULT_LANG
+        _attr_supported_languages = SUPPORT_LANGUAGES
+
+    await mock_config_entry_setup(hass, TestClass1())
+
+    class TestClass2(tts.TextToSpeechEntity):
+        @property
+        def default_language(self) -> str:
+            return DEFAULT_LANG
+
+        @property
+        def supported_languages(self) -> list[str]:
+            return SUPPORT_LANGUAGES
+
+    await mock_config_entry_setup(hass, TestClass2())
+
+    assert all(record.exc_info is None for record in caplog.records)
+
+    caplog.clear()
+
+    class TestClass3(tts.TextToSpeechEntity):
+        _attr_default_language = DEFAULT_LANG
+
+    await mock_config_entry_setup(hass, TestClass3())
+
+    assert (
+        "TTS entities must either set the '_attr_supported_languages' attribute or override the 'supported_languages' property"
+        in [
+            str(record.exc_info[1])
+            for record in caplog.records
+            if record.exc_info is not None
+        ]
+    )
+    caplog.clear()
+
+    class TestClass4(tts.TextToSpeechEntity):
+        _attr_supported_languages = SUPPORT_LANGUAGES
+
+    await mock_config_entry_setup(hass, TestClass4())
+
+    assert (
+        "TTS entities must either set the '_attr_default_language' attribute or override the 'default_language' property"
+        in [
+            str(record.exc_info[1])
+            for record in caplog.records
+            if record.exc_info is not None
+        ]
+    )
+    caplog.clear()
+
+    class TestClass5(tts.TextToSpeechEntity):
+        @property
+        def default_language(self) -> str:
+            return DEFAULT_LANG
+
+    await mock_config_entry_setup(hass, TestClass5())
+
+    assert (
+        "TTS entities must either set the '_attr_supported_languages' attribute or override the 'supported_languages' property"
+        in [
+            str(record.exc_info[1])
+            for record in caplog.records
+            if record.exc_info is not None
+        ]
+    )
+    caplog.clear()
+
+    class TestClass6(tts.TextToSpeechEntity):
+        @property
+        def supported_languages(self) -> list[str]:
+            return SUPPORT_LANGUAGES
+
+    await mock_config_entry_setup(hass, TestClass6())
+
+    assert (
+        "TTS entities must either set the '_attr_default_language' attribute or override the 'default_language' property"
+        in [
+            str(record.exc_info[1])
+            for record in caplog.records
+            if record.exc_info is not None
+        ]
+    )