add test_health to test health api

Signed-off-by: rongfu.leng <rongfu.leng@daocloud.io>

Author: lengrongfu

tests/entrypoints/openai/test_health.py

@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+import threading
+import time
+from http import HTTPStatus
+
+import pytest
+import requests
+
+from tests.utils import RemoteOpenAIServer
+
+MODEL_NAME = "Qwen/Qwen3-0.6B"
+
+
+@pytest.fixture(scope="class")
+def server():
+    args = [
+        "--enforce-eager", "--max-model-len", "100",
+        "--gpu-memory-utilization", "0.8"
+    ]
+
+    with RemoteOpenAIServer(MODEL_NAME, args) as remote_server:
+        yield remote_server
+
+
+class TestHealth:
+
+    def test_health_basic(self, server: RemoteOpenAIServer):
+        """Test basic health check endpoint."""
+        response = requests.get(server.url_for("health"))
+        assert response.status_code == HTTPStatus.OK
+
+    def test_health_with_generate(self, server: RemoteOpenAIServer):
+        """Test health check with generate parameter."""
+        response = requests.get(server.url_for("health"),
+                                params={"generate": "true"})
+        assert response.status_code == HTTPStatus.OK
+
+    def test_health_with_running_query(self, server: RemoteOpenAIServer):
+        generation_errors: list[Exception] = []
+        start_event = threading.Event()
+        done_event = threading.Event()
+
+        def _run_generate() -> None:
+            try:
+                client = server.get_client()
+                start_event.set()
+                client.completions.create(
+                    model=MODEL_NAME,
+                    prompt="Ping health endpoint",
+                    max_tokens=50,
+                    temperature=0.0,
+                )
+            except Exception as e:
+                generation_errors.append(e)
+            finally:
+                done_event.set()
+
+        generate_thread = threading.Thread(target=_run_generate, daemon=True)
+        generate_thread.start()
+
+        time.sleep(1)  # Ensure the generation has started
+        response = requests.get(server.url_for("health"),
+                                params={"generate": "true"})
+        assert response.status_code == HTTPStatus.OK
+
+        assert start_event.wait(
+            timeout=10), "Generation thread failed to start"
+        assert done_event.wait(timeout=300), "Generation thread did not finish"
+        generate_thread.join(timeout=0)
+        if generation_errors:
+            raise generation_errors[0]