TTS-028: Create Integration Tests for TTS Providers

[murdore]

Summary

Create integration tests for all TTS provider handlers (OpenAI, Google, Azure) that test real API calls, audio generation, streaming, voice listing, and error handling.

Technical Details

• File(s): test/integration/tts-providers.test.ts (create new)
• Effort: 4h

Acceptance Criteria

• [ ] Created test/integration/tts-providers.test.ts
• [ ] Test suite for OpenAITTSHandler
  • [ ] Test: synthesize() generates valid audio
  • [ ] Test: All 6 voices work
  • [ ] Test: Speed control works
  • [ ] Test: synthesizeStream() yields audio chunks
  • [ ] Test: getVoices() returns 6 voices
• [ ] Test suite for GoogleTTSHandler
  • [ ] Test: synthesize() generates valid audio
  • [ ] Test: SSML input works
  • [ ] Test: synthesizeStream() yields audio chunks
  • [ ] Test: getVoices() returns 220+ voices
• [ ] Test suite for AzureTTSHandler
  • [ ] Test: synthesize() generates valid audio
  • [ ] Test: Emotional styles work
  • [ ] Test: synthesizeStream() yields audio chunks
• [ ] Tests use real API keys from environment
• [ ] Tests can be skipped if API keys missing
• [ ] Validate audio buffer is non-empty
• [ ] Validate audio metadata is correct
• [ ] All tests pass

Dependencies

• Depends on: TTS-008, TTS-009, TTS-010, TTS-012, TTS-013, TTS-014, TTS-016, TTS-017
• Blocks: none

Priority: high | Effort: 4h | Complexity: moderate