【CI case】include total_tokens in the last packet of completion interface stream output (#3279)

* Add ci case for min token and max token

* 【CI case】include total_tokens in the last packet of completion interface stream output

---------

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

test/ce/server/test_completions.py

@@ -0,0 +1,42 @@
+#!/bin/env python3
+# -*- coding: utf-8 -*-
+# @author xujing43
+# encoding=utf-8 vi:ts=4:sw=4:expandtab:ft=python
+
+"""
+Checking for /v1/completions parameters
+"""
+
+import json
+
+from core import (
+    TEMPLATE,
+    URL,
+    build_request_payload,
+    send_request,
+)
+
+URL = URL.replace("/v1/chat/completions", "/v1/completions")
+
+def test_completion_total_tokens():
+    data = {
+        "prompt": "你是谁",
+        "stream": True,
+        "stream_options": {"include_usage": True, "continuous_usage_stats": True},
+    }
+    
+    payload = build_request_payload(TEMPLATE, data)
+    resp = send_request(URL, payload, stream=True)
+    last_data = None
+    for line in resp.iter_lines(decode_unicode=True):
+        if line.strip() == "data: [DONE]":
+            break
+        if line.strip() == "" or not line.startswith("data: "):
+            continue
+        line = line[len("data: "):]
+        last_data = json.loads(line)
+    usage = last_data["usage"]
+    total_tokens = usage["completion_tokens"] + usage["prompt_tokens"]
+    assert "total_tokens" in usage, "total_tokens 不存在"
+    assert usage["total_tokens"]== total_tokens, "total_tokens计数不正确"
+