tests: skip the Kokoro and Whisper suites without their extras

Both service modules raise ImportError when their optional dependency is
absent, which fails collection for anyone — CI included — running without those
extras installed. Guard each suite with importorskip so it skips instead.

Author: markbackman

tests/test_kokoro_tts_language.py

@@ -4,10 +4,20 @@
 # SPDX-License-Identifier: BSD 2-Clause License
 #
 
-"""Tests for Kokoro TTS language code mapping."""
+"""Tests for Kokoro TTS language code mapping.
 
-from pipecat.services.kokoro.tts import language_to_kokoro_language
-from pipecat.transcriptions.language import Language
+The service module is imported with ``pytest.importorskip`` so the suite is
+skipped rather than failing collection when the optional Kokoro dependencies
+aren't installed.
+"""
+
+import pytest
+
+# The service raises ImportError (not ModuleNotFoundError) when its extra is absent.
+pytest.importorskip("pipecat.services.kokoro.tts", exc_type=ImportError)
+
+from pipecat.services.kokoro.tts import language_to_kokoro_language  # noqa: E402
+from pipecat.transcriptions.language import Language  # noqa: E402
 
 
 def test_kokoro_uses_espeak_names_not_iso_codes():

tests/test_whisper_stt_language.py

@@ -4,14 +4,22 @@
 # SPDX-License-Identifier: BSD 2-Clause License
 #
 
-"""Tests for Whisper STT model/language compatibility checking."""
+"""Tests for Whisper STT model/language compatibility checking.
+
+The service module is imported with ``pytest.importorskip`` so the suite is
+skipped rather than failing collection when the optional Whisper dependencies
+aren't installed.
+"""
 
 from unittest.mock import MagicMock, patch
 
 import pytest
 
-from pipecat.services.whisper.stt import WhisperSTTService
-from pipecat.transcriptions.language import Language
+# The service raises ImportError (not ModuleNotFoundError) when its extra is absent.
+pytest.importorskip("pipecat.services.whisper.stt", exc_type=ImportError)
+
+from pipecat.services.whisper.stt import WhisperSTTService  # noqa: E402
+from pipecat.transcriptions.language import Language  # noqa: E402
 
 
 def _build(supported, **settings):