[Bugfix][Connectors] Flush processor tail on terminal async-chunk sends (#5414)

Signed-off-by: Yueqian Lin <70319226+linyueqian@users.noreply.github.com>

tests/model_executor/models/minicpmo_4_5/test_code2wav_model_dir.py

@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Unit tests for MiniCPM-o 4.5 code2wav model-dir resolution (#5442).
+
+In hub/CI deployments ``model_config.model`` is a repo id rather than a local
+directory, so asset lookups must resolve to the downloaded snapshot. The
+resolution must stay lazy: constructing the model with a fake path (as the
+CPU unit tests do) must not touch the hub.
+"""
+
+from __future__ import annotations
+
+from types import SimpleNamespace
+
+import huggingface_hub
+import pytest
+
+from vllm_omni.model_executor.models.minicpmo_4_5.minicpmo_4_5_code2wav import (
+    MiniCPMO45Code2Wav,
+    _resolve_model_dir,
+)
+
+pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
+
+
+def _no_hub(monkeypatch):
+    def _fail(*args, **kwargs):  # pragma: no cover - must not be reached
+        raise AssertionError("snapshot_download must not be called here")
+
+    monkeypatch.setattr(huggingface_hub, "snapshot_download", _fail)
+
+
+def test_local_directory_is_returned_unchanged(tmp_path, monkeypatch):
+    _no_hub(monkeypatch)
+    assert _resolve_model_dir(str(tmp_path)) == str(tmp_path)
+
+
+def test_repo_id_resolves_via_snapshot_download(tmp_path, monkeypatch):
+    calls = {}
+
+    def _fake_snapshot_download(model_ref, revision=None, allow_patterns=None):
+        calls["model_ref"] = model_ref
+        calls["revision"] = revision
+        calls["allow_patterns"] = allow_patterns
+        return str(tmp_path / "snapshot")
+
+    monkeypatch.setattr(huggingface_hub, "snapshot_download", _fake_snapshot_download)
+    resolved = _resolve_model_dir("openbmb/MiniCPM-o-4_5", revision="abc123")
+    assert resolved == str(tmp_path / "snapshot")
+    assert calls["model_ref"] == "openbmb/MiniCPM-o-4_5"
+    assert calls["revision"] == "abc123"
+    assert calls["allow_patterns"] == ["assets/*"]
+
+
+def test_snapshot_download_failure_propagates(monkeypatch):
+    def _raise(*args, **kwargs):
+        raise FileNotFoundError("offline and not cached")
+
+    monkeypatch.setattr(huggingface_hub, "snapshot_download", _raise)
+    with pytest.raises(FileNotFoundError):
+        _resolve_model_dir("openbmb/MiniCPM-o-4_5")
+
+
+def test_init_with_fake_path_does_not_resolve(monkeypatch):
+    """Mirrors the CPU-test construction: fake model path, no ``revision``."""
+    _no_hub(monkeypatch)
+    config = SimpleNamespace(
+        model_config=SimpleNamespace(
+            model="/fake/model",
+            stage_connector_config=None,
+        )
+    )
+    model = MiniCPMO45Code2Wav(vllm_config=config)
+    assert model.model_path == "/fake/model"
+    assert model._default_prompt_wav == "/fake/model/assets/HT_ref_audio.wav"
+
+
+def test_default_prompt_wav_follows_resolved_model_path(monkeypatch):
+    _no_hub(monkeypatch)
+    config = SimpleNamespace(
+        model_config=SimpleNamespace(
+            model="openbmb/MiniCPM-o-4_5",
+            stage_connector_config=None,
+        )
+    )
+    model = MiniCPMO45Code2Wav(vllm_config=config)
+    model.model_path = "/resolved/snapshot"
+    assert model._default_prompt_wav == "/resolved/snapshot/assets/HT_ref_audio.wav"