[CE] Add base test class for web server testing (#3120)

* add test base class

* fix codestyle

* fix codestyle

test/ce/server/demo.py

@@ -0,0 +1,48 @@
+#!/bin/env python3
+# -*- coding: utf-8 -*-
+# @author DDDivano
+# encoding=utf-8 vi:ts=4:sw=4:expandtab:ft=python
+
+from core import TEMPLATE, URL, build_request_payload, send_request
+
+
+def demo():
+    data = {
+        "stream": False,
+        "messages": [
+            {"role": "system", "content": "You are a helpful assistant."},
+            {"role": "user", "content": "牛顿的三大运动定律是什么？"},
+        ],
+        "max_tokens": 3,
+    }
+    payload = build_request_payload(TEMPLATE, data)
+    req = send_request(URL, payload)
+    print(req.json())
+    req = req.json()
+
+    assert req["usage"]["prompt_tokens"] == 22
+    assert req["usage"]["total_tokens"] == 25
+    assert req["usage"]["completion_tokens"] == 3
+
+
+def test_demo():
+    data = {
+        "stream": False,
+        "messages": [
+            {"role": "system", "content": "You are a helpful assistant."},
+            {"role": "user", "content": "牛顿的三大运动定律是什么？"},
+        ],
+        "max_tokens": 3,
+    }
+    payload = build_request_payload(TEMPLATE, data)
+    req = send_request(URL, payload)
+    print(req.json())
+    req = req.json()
+
+    assert req["usage"]["prompt_tokens"] == 22
+    assert req["usage"]["total_tokens"] == 25
+    assert req["usage"]["completion_tokens"] == 5
+
+
+if __name__ == "__main__":
+    demo()