[Test] Cleanup for helpers (#6523)

Signed-off-by: wangyu <410167048@qq.com>
Signed-off-by: [Your Name] <your.email@example.com>
Co-authored-by: amy-why-3459 <wuhaiyan17@huawei.com>

tests/entrypoints/openai_api/test_tts_adapter.py

@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM-Omni project
 """Unit tests for the TTS serving adapter registry (RFC #4327).
 
 Pure-Python registry/resolution logic; no model or GPU resources are loaded.
@@ -6,6 +7,7 @@ Pure-Python registry/resolution logic; no model or GPU resources are loaded.
 
 import asyncio
 from types import SimpleNamespace
+from typing import Any
 
 import pytest
 
@@ -17,6 +19,7 @@ from vllm_omni.entrypoints.openai.tts_adapters import (
     detect_tts_model_type,
     resolve_adapter,
 )
+from vllm_omni.entrypoints.openai.tts_adapters.higgs_audio_v2 import HiggsAudioV2Adapter
 from vllm_omni.entrypoints.openai.tts_adapters.indextts2 import (
     IndexTTS2Adapter,
     IndexTTS25Adapter,
@@ -234,5 +237,58 @@ def test_diffusion_adapter_extra_body_params_fallback():
     assert _DiffAdapter.extra_body_params() == frozenset()
 
 
+def _higgs_v2_adapter() -> HiggsAudioV2Adapter:
+    server = SimpleNamespace(
+        _apply_uploaded_speaker=lambda request: None,
+        uploaded_speakers={},
+    )
+    return HiggsAudioV2Adapter(SimpleNamespace(server=server))
+
+
+def _higgs_v2_request(**overrides: Any) -> SimpleNamespace:
+    fields: dict[str, Any] = {
+        "input": "Hello world.",
+        "ref_audio": None,
+        "ref_text": None,
+        "voice": None,
+        "x_vector_only_mode": None,
+        "speaker_embedding": None,
+        "instructions": None,
+        "task_type": None,
+        "language": None,
+        "speed": None,
+        "max_new_tokens": None,
+    }
+    fields.update(overrides)
+    return SimpleNamespace(**fields)
+
+
+@pytest.mark.parametrize(
+    "overrides, err_substr",
+    [
+        pytest.param({"ref_audio": "data:audio/wav;base64,AA=="}, "ref_text", id="ref_audio_without_ref_text"),
+        pytest.param({"ref_text": "some transcript"}, "ref_audio", id="ref_text_without_ref_audio"),
+        pytest.param({"task_type": "Base"}, "task_type", id="task_type"),
+        pytest.param({"language": "Chinese"}, "language", id="language_override"),
+        pytest.param({"input": "[SPEAKER0] hi"}, "multi-speaker", id="multi_speaker_tag"),
+        pytest.param({"input": "   "}, "empty", id="input_whitespace_only"),
+    ],
+)
+def test_higgs_audio_v2_validate_rejects_out_of_scope_fields(overrides: dict[str, object], err_substr: str) -> None:
+    """Adapter-only policy checks formerly covered by invalid_param e2e on a live V2 server."""
+    adapter = _higgs_v2_adapter()
+    err = adapter.validate(_higgs_v2_request(**overrides))
+    assert err is not None
+    assert err_substr.lower() in err.lower()
+
+
+def test_higgs_audio_v2_validate_accepts_plain_text_and_paired_clone() -> None:
+    adapter = _higgs_v2_adapter()
+    assert adapter.validate(_higgs_v2_request()) is None
+    assert (
+        adapter.validate(_higgs_v2_request(ref_audio="data:audio/wav;base64,AA==", ref_text="some transcript")) is None
+    )
+
+
 if __name__ == "__main__":
     pytest.main([__file__, "-v"])