Add ci case for min token and max token (#3229)

Co-authored-by: xujing43 <xujing43@baidu.com>

test/ce/server/test_params_boundary.py

@@ -0,0 +1,36 @@
+#!/bin/env python3
+# -*- coding: utf-8 -*-
+# @author xujing43
+# encoding=utf-8 vi:ts=4:sw=4:expandtab:ft=python
+
+"""
+Boundary value checking for API parameters
+"""
+
+import json
+
+from core import (
+    TEMPLATE,
+    URL,
+    build_request_payload,
+    send_request,
+)
+
+def test_max_min_1_token():
+    data = {
+        "stream": False,
+        "messages": [{"role": "user", "content": "非洲的首都是？"}],
+        "max_tokens": 1,
+        "metadata": {
+                "min_tokens": 1
+            },
+    }
+    payload = build_request_payload(TEMPLATE, data)
+    response = send_request(URL, payload).json()
+
+    response_object = response["object"]
+    assert "error" not in response_object, f"响应中包含错误信息: {response_object}"
+    completion_tokens = response["usage"]["completion_tokens"]
+    assert completion_tokens == 1, f"实际生成的token数为: {completion_tokens}, 应该为1"
+    finish_reason = response["choices"][0]["finish_reason"]
+    assert finish_reason == "length", f"内容不可能完整生成, 但实际finish_reason为: {response}"