Tiny refactor request logger (#15740)

test/registered/debug_utils/test_request_logger.py

@@ -0,0 +1,60 @@
+import io
+import unittest
+
+import requests
+
+from sglang.srt.utils import kill_process_tree
+from sglang.test.ci.ci_register import register_cuda_ci
+from sglang.test.test_utils import (
+    DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+    DEFAULT_URL_FOR_TEST,
+    CustomTestCase,
+    popen_launch_server,
+)
+
+register_cuda_ci(est_time=60, suite="nightly-1-gpu", nightly=True)
+
+
+class TestRequestLogger(CustomTestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.stdout = io.StringIO()
+        cls.stderr = io.StringIO()
+
+        cls.process = popen_launch_server(
+            "Qwen/Qwen3-0.6B",
+            DEFAULT_URL_FOR_TEST,
+            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            other_args=[
+                "--log-requests",
+                "--log-requests-level",
+                "2",
+                "--skip-server-warmup",
+            ],
+            return_stdout_stderr=(cls.stdout, cls.stderr),
+        )
+
+    @classmethod
+    def tearDownClass(cls):
+        kill_process_tree(cls.process.pid)
+        cls.stdout.close()
+        cls.stderr.close()
+
+    def test_request_logging(self):
+        response = requests.post(
+            DEFAULT_URL_FOR_TEST + "/generate",
+            json={
+                "text": "Hello",
+                "sampling_params": {"max_new_tokens": 8, "temperature": 0},
+            },
+            timeout=30,
+        )
+        self.assertEqual(response.status_code, 200)
+
+        combined_output = self.stdout.getvalue() + self.stderr.getvalue()
+        self.assertIn("Receive:", combined_output)
+        self.assertIn("Finish:", combined_output)
+
+
+if __name__ == "__main__":
+    unittest.main()