from __future__ import annotations import base64 import io import unittest import urllib.error from pathlib import Path from unittest import mock from voice_code_bench import providers from voice_code_bench.http import post_json, safe_error_body, safe_url from voice_code_bench.models import ( STT_MODELS, SttMode, SttModelConfig, TranscriptionResult, stt_endpoint_or_api, selected_stt_models, stt_request_model, stt_run_metadata, ) from voice_code_bench.providers.audio import iter_audio_chunks, require_executable from voice_code_bench.providers.elevenlabs import _form_fields, _query_value from voice_code_bench.providers.modal import ( MODAL_ENDPOINT_DESCRIPTION, modal_chat_completions_endpoint, modal_transcript_from_response, modal_transcription_payload, ) from voice_code_bench.providers.modal_asr import ( MODAL_ASR_ENDPOINT_DESCRIPTION_BY_SECRET, modal_asr_endpoint, modal_asr_payload, modal_asr_transcript_from_response, ) from voice_code_bench.providers.openai import order_realtime_item_ids class FakeProviderAdapter: def __init__(self) -> None: self.calls: list[tuple[Path, SttModelConfig, dict[str, str], str | None]] = [] def transcribe( self, audio_path: Path, stt_model: SttModelConfig, secrets: dict[str, str], project_id: str | None, ) -> TranscriptionResult: self.calls.append((audio_path, stt_model, secrets, project_id)) return {"transcript": "delegated"} def endpoint_or_api( self, stt_model: SttModelConfig, secrets: dict[str, str] | None = None, ) -> str: return f"endpoint:{stt_model.provider}" def request_model(self, stt_model: SttModelConfig, secrets: dict[str, str] | None = None) -> str: return f"request:{stt_model.model}" class ProviderHelperTests(unittest.TestCase): def test_iter_audio_chunks_rejects_non_positive_sizes(self) -> None: with self.assertRaises(ValueError): list(iter_audio_chunks(b"abc", 0)) with self.assertRaises(ValueError): list(iter_audio_chunks(b"abc", -1)) def test_iter_audio_chunks_chunks_bytes(self) -> None: self.assertEqual(list(iter_audio_chunks(b"abcdef", 2)), [b"ab", b"cd", b"ef"]) self.assertEqual(list(iter_audio_chunks(b"abcde", 2)), [b"ab", b"cd", b"e"]) self.assertEqual(list(iter_audio_chunks(b"", 2)), []) def test_missing_external_tool_error_is_explicit(self) -> None: with self.assertRaisesRegex(RuntimeError, "missing tool"): require_executable("voice-code-bench-definitely-missing-tool", "missing tool") def test_http_diagnostics_redact_sensitive_values(self) -> None: self.assertEqual( safe_url("https://example.test/path?api_key=secret&token=abc&model=x"), "https://example.test/path?api_key=REDACTED&token=REDACTED&model=x", ) body = '{"api_key":"secret","message":"bad token"}' self.assertNotIn("secret", safe_error_body(body)) def test_http_can_retry_provider_specific_empty_400(self) -> None: error = urllib.error.HTTPError( "https://example.test/v1/chat/completions", 400, "Bad Request", {}, io.BytesIO(b""), ) response = mock.MagicMock() response.__enter__.return_value.read.return_value = b'{"ok":true}' with ( mock.patch("voice_code_bench.http.urllib.request.urlopen", side_effect=[error, response]), mock.patch("voice_code_bench.http.sleep_before_retry") as sleep, ): result = post_json( "https://example.test/v1/chat/completions", {"model": "test"}, max_attempts=2, retryable_empty_error_status_codes={400}, ) self.assertEqual(result, {"ok": True}) sleep.assert_called_once() def test_openai_realtime_item_ordering_uses_previous_item_id_chain(self) -> None: self.assertEqual( order_realtime_item_ids( ["item-3", "item-1", "item-2"], {"item-1": None, "item-2": "item-1", "item-3": "item-2"}, ), ["item-1", "item-2", "item-3"], ) def test_modal_inkling_payload_uses_official_prompt_order_and_max_effort(self) -> None: model = SttModelConfig( id="modal_inkling", provider="modal", model="thinkingmachines/Inkling-NVFP4", options={ "prompt": "Transcribe the following speech to text.", "max_tokens": 4096, "reasoning_effort": "max", }, ) payload = modal_transcription_payload(b"RIFF-audio", model) self.assertEqual(payload["model"], "thinkingmachines/Inkling-NVFP4") self.assertEqual(payload["max_tokens"], 4096) self.assertEqual(payload["reasoning_effort"], "max") content = payload["messages"][0]["content"] self.assertEqual(content[0], {"type": "text", "text": "Transcribe the following speech to text."}) audio_url = content[1]["audio_url"]["url"] prefix = "data:audio/wav;base64," self.assertTrue(audio_url.startswith(prefix)) self.assertEqual(base64.b64decode(audio_url.removeprefix(prefix)), b"RIFF-audio") def test_modal_endpoint_normalizes_dashboard_url_variants(self) -> None: base = "https://example--inkling.modal.direct" expected = f"{base}/v1/chat/completions" self.assertEqual(modal_chat_completions_endpoint(base), expected) self.assertEqual(modal_chat_completions_endpoint(f"{base}/v1"), expected) self.assertEqual(modal_chat_completions_endpoint(expected), expected) with self.assertRaisesRegex(ValueError, "HTTPS URL"): modal_chat_completions_endpoint("not-a-url") def test_modal_inkling_payload_rejects_invalid_generation_options(self) -> None: empty_prompt_model = SttModelConfig( id="modal_inkling", provider="modal", model="thinkingmachines/Inkling-NVFP4", options={"prompt": ""}, ) with self.assertRaisesRegex(ValueError, "prompt"): modal_transcription_payload(b"audio", empty_prompt_model) invalid_max_tokens_model = SttModelConfig( id="modal_inkling", provider="modal", model="thinkingmachines/Inkling-NVFP4", options={"max_tokens": 0}, ) with self.assertRaisesRegex(ValueError, "max_tokens"): modal_transcription_payload(b"audio", invalid_max_tokens_model) invalid_reasoning_model = SttModelConfig( id="modal_inkling", provider="modal", model="thinkingmachines/Inkling-NVFP4", options={"reasoning_effort": "extreme"}, ) with self.assertRaisesRegex(ValueError, "reasoning_effort"): modal_transcription_payload(b"audio", invalid_reasoning_model) def test_modal_transcript_preserves_response_text_verbatim(self) -> None: self.assertEqual( modal_transcript_from_response({"choices": [{"message": {"content": " leading text\n"}}]}), " leading text\n", ) with self.assertRaisesRegex(ValueError, "message content"): modal_transcript_from_response({"choices": []}) def test_modal_transcribe_uses_converted_audio_and_chat_endpoint(self) -> None: model = SttModelConfig( id="modal_inkling", provider="modal", model="thinkingmachines/Inkling-NVFP4", options={"sample_rate": 16000, "channels": 1}, ) response = {"choices": [{"message": {"content": "transcribed"}}]} with ( mock.patch("voice_code_bench.providers.modal.wav_audio_bytes", return_value=b"wav") as convert, mock.patch("voice_code_bench.providers.modal.post_json", return_value=response) as post, ): result = providers.modal.transcribe( Path("audio.wav"), model, "https://example--inkling.modal.direct", "wk-token-id", "ws-token-secret", ) self.assertEqual(result, {"transcript": "transcribed"}) convert.assert_called_once_with(Path("audio.wav"), sample_rate=16000, channels=1) self.assertEqual( post.call_args.args[0], "https://example--inkling.modal.direct/v1/chat/completions", ) self.assertEqual( post.call_args.args[2], {"Modal-Key": "wk-token-id", "Modal-Secret": "ws-token-secret"}, ) self.assertEqual(post.call_args.kwargs["max_attempts"], 10) self.assertEqual(post.call_args.kwargs["retryable_empty_error_status_codes"], {400}) def test_modal_asr_payload_encodes_complete_wav_without_chat_payload(self) -> None: model = SttModelConfig( id="modal_nvidia_parakeet_tdt_0_6b_v3", provider="modal", model="nvidia/parakeet-tdt-0.6b-v3", options={}, ) payload = modal_asr_payload(b"RIFF-audio", model) self.assertEqual(base64.b64decode(payload["audio_base64"]), b"RIFF-audio") self.assertEqual(payload["audio_format"], "wav") self.assertNotIn("messages", payload) self.assertNotIn("model", payload) self.assertNotIn("prompt", payload) def test_modal_asr_payload_includes_language_only_when_configured(self) -> None: configured = SttModelConfig( id="modal_nvidia_parakeet_tdt_0_6b_v3", provider="modal", model="nvidia/parakeet-tdt-0.6b-v3", options={"language": "en"}, ) absent = SttModelConfig( id="modal_nvidia_parakeet_tdt_0_6b_v3", provider="modal", model="nvidia/parakeet-tdt-0.6b-v3", options={}, ) invalid = SttModelConfig( id="modal_nvidia_parakeet_tdt_0_6b_v3", provider="modal", model="nvidia/parakeet-tdt-0.6b-v3", options={"language": True}, ) self.assertEqual(modal_asr_payload(b"wav", configured)["language"], "en") self.assertNotIn("language", modal_asr_payload(b"wav", absent)) with self.assertRaisesRegex(ValueError, "language must be a string"): modal_asr_payload(b"wav", invalid) def test_modal_omniasr_payload_includes_language_and_no_chat_fields(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_meta_omniasr_llm_unlimited_7b_v2") payload = modal_asr_payload(b"RIFF-audio", model) self.assertEqual(base64.b64decode(payload["audio_base64"]), b"RIFF-audio") self.assertEqual(payload["audio_format"], "wav") self.assertEqual(payload["language"], "eng_Latn") self.assertNotIn("messages", payload) self.assertNotIn("model", payload) self.assertNotIn("prompt", payload) def test_modal_asr_endpoint_normalizes_https_endpoint(self) -> None: self.assertEqual( modal_asr_endpoint(" https://example--parakeet.modal.run/ ", "MODAL_PARAKEET_ENDPOINT"), "https://example--parakeet.modal.run", ) with self.assertRaisesRegex(ValueError, "MODAL_PARAKEET_ENDPOINT must be a valid HTTPS URL"): modal_asr_endpoint("http://example.test", "MODAL_PARAKEET_ENDPOINT") def test_modal_asr_transcript_preserves_verbatim_text(self) -> None: self.assertEqual( modal_asr_transcript_from_response({"transcript": " leading text\n"}), " leading text\n", ) def test_modal_asr_transcript_rejects_missing_empty_or_non_string_response(self) -> None: for response in [{}, {"transcript": ""}, {"transcript": None}, {"transcript": 123}, []]: with self.assertRaisesRegex(ValueError, "non-empty transcript string"): modal_asr_transcript_from_response(response) def test_modal_asr_transcribe_uses_converted_audio_proxy_headers_and_endpoint(self) -> None: model = SttModelConfig( id="modal_nvidia_parakeet_tdt_0_6b_v3", provider="modal", model="nvidia/parakeet-tdt-0.6b-v3", options={ "sample_rate": 16000, "channels": 1, "language": "en", "timeout_seconds": 600.0, "max_attempts": 10, }, ) with ( mock.patch("voice_code_bench.providers.modal_asr.wav_audio_bytes", return_value=b"wav") as convert, mock.patch("voice_code_bench.providers.modal_asr.post_json", return_value={"transcript": "asr"}) as post, ): result = providers.modal_asr.transcribe( Path("audio.wav"), model, "https://example--parakeet.modal.run/", "wk-token-id", "ws-token-secret", endpoint_secret_name="MODAL_PARAKEET_ENDPOINT", ) self.assertEqual(result, {"transcript": "asr"}) convert.assert_called_once_with(Path("audio.wav"), sample_rate=16000, channels=1) self.assertEqual(post.call_args.args[0], "https://example--parakeet.modal.run") self.assertEqual(post.call_args.args[1]["audio_format"], "wav") self.assertEqual(post.call_args.args[1]["language"], "en") self.assertEqual( post.call_args.args[2], {"Modal-Key": "wk-token-id", "Modal-Secret": "ws-token-secret"}, ) self.assertEqual(post.call_args.kwargs["timeout"], 600.0) self.assertEqual(post.call_args.kwargs["max_attempts"], 10) def test_modal_asr_transcribe_rejects_streaming_model(self) -> None: model = SttModelConfig( id="modal_nvidia_parakeet_tdt_0_6b_v3_streaming", provider="modal", model="nvidia/parakeet-tdt-0.6b-v3", options={}, mode=SttMode.STREAM, ) with self.assertRaisesRegex(ValueError, "only supports batch transcription"): providers.modal_asr.transcribe( Path("audio.wav"), model, "https://example--parakeet.modal.run", "wk-token-id", "ws-token-secret", endpoint_secret_name="MODAL_PARAKEET_ENDPOINT", ) def test_elevenlabs_bool_encoding_for_query_and_form_values(self) -> None: self.assertEqual(_query_value(True), "true") self.assertEqual(_query_value(False), "false") self.assertEqual(_query_value("en"), "en") self.assertEqual( _form_fields( {"model_id": "scribe_v2"}, { "language_code": "en", "tag_audio_events": False, "diarize": True, "seed": None, }, ), { "model_id": "scribe_v2", "language_code": "en", "tag_audio_events": "false", "diarize": "true", }, ) def test_registered_providers_cover_all_stt_models(self) -> None: registered_providers = set(providers.PROVIDER_REGISTRY) model_providers = {model.provider for model in STT_MODELS} self.assertEqual(model_providers - registered_providers, set()) def test_selected_stt_models_can_select_modal_parakeet(self) -> None: selected = selected_stt_models("modal_nvidia_parakeet_tdt_0_6b_v3") self.assertEqual(len(selected), 1) self.assertEqual(selected[0].id, "modal_nvidia_parakeet_tdt_0_6b_v3") self.assertEqual(selected[0].mode, SttMode.BATCH) def test_selected_stt_models_can_select_modal_omniasr(self) -> None: selected = selected_stt_models("modal_meta_omniasr_llm_unlimited_7b_v2") self.assertEqual(len(selected), 1) self.assertEqual(selected[0].id, "modal_meta_omniasr_llm_unlimited_7b_v2") self.assertEqual(selected[0].mode, SttMode.BATCH) def test_transcribe_delegates_through_registry(self) -> None: adapter = FakeProviderAdapter() model = SttModelConfig(id="fake_model", provider="fake", model="fake-model", options={}) providers.PROVIDER_REGISTRY["fake"] = adapter try: result = providers.transcribe(Path("audio.wav"), model, {"SECRET": "value"}, "project-1") finally: providers.PROVIDER_REGISTRY.pop("fake", None) self.assertEqual(result, {"transcript": "delegated"}) self.assertEqual(adapter.calls, [(Path("audio.wav"), model, {"SECRET": "value"}, "project-1")]) def test_unsupported_provider_raises_value_error(self) -> None: model = SttModelConfig(id="missing_model", provider="missing", model="missing-model", options={}) with self.assertRaisesRegex(ValueError, "Unsupported provider: missing"): providers.transcribe(Path("audio.wav"), model, {}, None) def test_provider_metadata_comes_from_registry(self) -> None: models_by_id = {model.id: model for model in STT_MODELS} self.assertEqual(stt_endpoint_or_api(models_by_id["deepgram_nova3"]), "https://api.deepgram.com/v1/listen") self.assertEqual( stt_endpoint_or_api(models_by_id["deepgram_nova3_streaming"]), "wss://api.deepgram.com/v1/listen", ) self.assertEqual( stt_endpoint_or_api(models_by_id["google_cloud_chirp_3"]), "Google Cloud Speech-to-Text v2 recognize", ) self.assertEqual( stt_endpoint_or_api(models_by_id["google_cloud_chirp_3_streaming"]), "Google Cloud Speech-to-Text v2 streaming_recognize", ) self.assertEqual( stt_endpoint_or_api(models_by_id["amazon_transcribe_streaming"]), "Amazon Transcribe Streaming start_stream_transcription", ) self.assertEqual( stt_endpoint_or_api(models_by_id["modal_inkling"]), MODAL_ENDPOINT_DESCRIPTION, ) self.assertEqual(models_by_id["modal_inkling"].mode, SttMode.BATCH) self.assertEqual(stt_request_model(models_by_id["whisper_large_v3"]), "whisper-large-v3") self.assertEqual(stt_request_model(models_by_id["openai_gpt_4o_transcribe"]), "gpt-4o-transcribe") self.assertEqual( stt_request_model(models_by_id["modal_inkling"]), "thinkingmachines/Inkling-NVFP4", ) self.assertEqual( models_by_id["modal_inkling"].options["prompt"], "Transcribe the following speech to text.", ) self.assertEqual(models_by_id["modal_inkling"].options["reasoning_effort"], "max") parakeet = models_by_id["modal_nvidia_parakeet_tdt_0_6b_v3"] self.assertEqual( stt_endpoint_or_api(parakeet), MODAL_ASR_ENDPOINT_DESCRIPTION_BY_SECRET["MODAL_PARAKEET_ENDPOINT"], ) self.assertEqual(parakeet.model, "nvidia/parakeet-tdt-0.6b-v3") self.assertEqual(parakeet.mode, SttMode.BATCH) self.assertEqual(parakeet.options["sample_rate"], 16000) self.assertEqual(parakeet.options["channels"], 1) self.assertEqual(parakeet.options["audio_format"], "wav") self.assertEqual(parakeet.options["modal_gpu"], "L40S") self.assertEqual(parakeet.options["upstream_model_revision"], "b51b7dc0fbf7f266a97880fb4b626c56d28f4b96") def test_modal_omniasr_registration_and_metadata(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_meta_omniasr_llm_unlimited_7b_v2") self.assertEqual( stt_endpoint_or_api(model), MODAL_ASR_ENDPOINT_DESCRIPTION_BY_SECRET["MODAL_OMNIASR_ENDPOINT"], ) self.assertEqual(model.provider, "modal") self.assertEqual(model.model, "omniASR_LLM_Unlimited_7B_v2") self.assertEqual(model.mode, SttMode.BATCH) self.assertEqual(model.options["sample_rate"], 16000) self.assertEqual(model.options["channels"], 1) self.assertEqual(model.options["audio_format"], "wav") self.assertEqual(model.options["language"], "eng_Latn") self.assertEqual(model.options["upstream_model_revision"], "omnilingual-asr==0.2.0") self.assertEqual(model.options["modal_app"], "voice-code-bench-omniasr") self.assertEqual(model.options["modal_gpu"], "L40S") self.assertEqual(model.options["runtime"], "omnilingual-asr") self.assertEqual(model.options["runtime_revision"], "0.2.0") self.assertEqual(model.options["batch_size"], 1) self.assertEqual(model.options["max_attempts"], 10) self.assertEqual(model.options["timeout_seconds"], 600.0) def test_modal_endpoint_is_recorded_in_run_metadata(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_inkling") secrets = {"MODAL_INKLING_ENDPOINT": "https://example--inkling.modal.direct"} expected = "https://example--inkling.modal.direct/v1/chat/completions" self.assertEqual(stt_endpoint_or_api(model, secrets), expected) metadata = stt_run_metadata(model, "2026-07-16", secrets) self.assertEqual(metadata["endpoint_or_api"], expected) def test_modal_parakeet_endpoint_is_recorded_in_run_metadata(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_nvidia_parakeet_tdt_0_6b_v3") secrets = {"MODAL_PARAKEET_ENDPOINT": "https://example--parakeet.modal.run/"} expected = "https://example--parakeet.modal.run" self.assertEqual(stt_endpoint_or_api(model, secrets), expected) metadata = stt_run_metadata(model, "2026-07-24", secrets) self.assertEqual(metadata["endpoint_or_api"], expected) self.assertEqual(metadata["model"], "nvidia/parakeet-tdt-0.6b-v3") self.assertEqual(metadata["mode"], "batch") self.assertEqual(metadata["inference_settings"]["sample_rate"], 16000) self.assertEqual(metadata["inference_settings"]["channels"], 1) self.assertEqual(metadata["inference_settings"]["audio_format"], "wav") self.assertEqual(metadata["inference_settings"]["modal_gpu"], "L40S") self.assertEqual( metadata["inference_settings"]["upstream_model_revision"], "b51b7dc0fbf7f266a97880fb4b626c56d28f4b96", ) def test_modal_omniasr_endpoint_is_recorded_in_run_metadata(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_meta_omniasr_llm_unlimited_7b_v2") secrets = {"MODAL_OMNIASR_ENDPOINT": "https://example--omniasr.modal.run/"} expected = "https://example--omniasr.modal.run" self.assertEqual(stt_endpoint_or_api(model, secrets), expected) metadata = stt_run_metadata(model, "2026-07-24", secrets) self.assertEqual(metadata["endpoint_or_api"], expected) self.assertEqual(metadata["model"], "omniASR_LLM_Unlimited_7B_v2") self.assertEqual(metadata["mode"], "batch") self.assertEqual(metadata["provider"], "modal") self.assertEqual(metadata["inference_settings"]["language"], "eng_Latn") self.assertEqual(metadata["inference_settings"]["runtime_revision"], "0.2.0") self.assertEqual(metadata["inference_settings"]["timeout_seconds"], 600.0) def test_modal_adapter_dispatches_parakeet_to_modal_asr(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_nvidia_parakeet_tdt_0_6b_v3") secrets = { "MODAL_PARAKEET_ENDPOINT": "https://example--parakeet.modal.run", "MODAL_PROXY_TOKEN_ID": "wk-token-id", "MODAL_PROXY_TOKEN_SECRET": "ws-token-secret", } with mock.patch("voice_code_bench.providers.modal_asr.transcribe", return_value={"transcript": "ok"}) as transcribe: result = providers.transcribe(Path("audio.wav"), model, secrets, None) self.assertEqual(result, {"transcript": "ok"}) transcribe.assert_called_once_with( Path("audio.wav"), model, "https://example--parakeet.modal.run", "wk-token-id", "ws-token-secret", endpoint_secret_name="MODAL_PARAKEET_ENDPOINT", ) def test_modal_adapter_dispatches_omniasr_to_modal_asr(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_meta_omniasr_llm_unlimited_7b_v2") secrets = { "MODAL_OMNIASR_ENDPOINT": "https://example--omniasr.modal.run", "MODAL_PROXY_TOKEN_ID": "wk-token-id", "MODAL_PROXY_TOKEN_SECRET": "ws-token-secret", } with mock.patch("voice_code_bench.providers.modal_asr.transcribe", return_value={"transcript": "ok"}) as transcribe: result = providers.transcribe(Path("audio.wav"), model, secrets, None) self.assertEqual(result, {"transcript": "ok"}) transcribe.assert_called_once_with( Path("audio.wav"), model, "https://example--omniasr.modal.run", "wk-token-id", "ws-token-secret", endpoint_secret_name="MODAL_OMNIASR_ENDPOINT", ) def test_modal_omniasr_missing_secrets_are_redacted(self) -> None: model = next(model for model in STT_MODELS if model.id == "modal_meta_omniasr_llm_unlimited_7b_v2") secrets = { "MODAL_OMNIASR_ENDPOINT": "https://example--omniasr.modal.run", "MODAL_PROXY_TOKEN_ID": "wk-secret-token-id", } with self.assertRaisesRegex(RuntimeError, "Missing MODAL_PROXY_TOKEN_SECRET") as raised: providers.transcribe(Path("audio.wav"), model, secrets, None) self.assertNotIn("wk-secret-token-id", str(raised.exception)) self.assertNotIn("example--omniasr", str(raised.exception)) def test_modal_adapter_rejects_unknown_modal_model_id(self) -> None: model = SttModelConfig(id="modal_unknown", provider="modal", model="unknown", options={}) with self.assertRaisesRegex(ValueError, "Unsupported Modal model ID: modal_unknown"): providers.transcribe(Path("audio.wav"), model, {}, None) def test_registry_adapter_metadata_methods_are_used(self) -> None: adapter = FakeProviderAdapter() model = SttModelConfig( id="fake_stream_model", provider="fake", model="fake-stream-model", options={}, mode=SttMode.STREAM, ) providers.PROVIDER_REGISTRY["fake"] = adapter try: self.assertEqual(stt_endpoint_or_api(model), "endpoint:fake") self.assertEqual(stt_request_model(model), "request:fake-stream-model") finally: providers.PROVIDER_REGISTRY.pop("fake", None) if __name__ == "__main__": unittest.main()