Update test-functional.md

docs/guide-zh-CN/test-functional.md

@@ -1,22 +1,22 @@
 功能测试
 ================
 
-Functional test verifies scenarios from a user's perspective. It is similar to [acceptance test](test-acceptance.md)
-but instead of communicating via HTTP it is filling up environment such as POST and GET parameters and then executes
-application instance right from the code.
+功能测试从用户的角度验证场景。 它类似于[acceptance test](测试-验收.md)。 但是它不是通过HTTP进行通信， 而是填充环境， 如POST和GET参数， 然后直接从代码中执行应用程序实例。
 
-Functional tests are generally faster than acceptance tests and are providing detailed stack traces on failures.
-As a rule of thumb, they should be preferred unless you have a special web server setup or complex UI powered by
-JavaScript.
 
-Functional testing is implemented with the help of Codeception framework which has a nice documentation about it:
 
-- [Codeception for Yii framework](http://codeception.com/for/yii)
-- [Codeception Functional Tests](http://codeception.com/docs/04-FunctionalTests)
+功能测试通常比验收测试快， 并且在失败时提供详细的堆栈跟踪。 作为经验法则， 除非有专门的 Web 服务器设置或者 JavaScript 驱动的复杂 UI， 否则它们应该是首选的。
 
-## Running basic and advanced template tests
 
-If you've started with advanced template, please refer to ["testing" guide](https://github.com/yiisoft/yii2-app-advanced/blob/master/docs/guide/start-testing.md)
-for more details about running tests.  
 
-If you've started with basic template, check its [README "testing" section](https://github.com/yiisoft/yii2-app-basic/blob/master/README.md#testing).
+功能测试是借助于具有良好文档的 Codeception 框架来实现的：
+
+- [基于YII框架的 Codeception](http://codeception.com/for/yii)
+- [Codeception 的功能测试](http://codeception.com/docs/04-FunctionalTests)
+
+## 运行基本的和高级的模板测试
+
+如果你已经开始使用高级模板， 请参阅["testing" 指南](https://github.com/yiisoft/yii2-app-advanced/blob/master/docs/guide/start-testing.md)
+有关运行测试的更多细节。  
+
+如果你已经开始使用基本模板， 请检查其 [README "testing" 部分](https://github.com/yiisoft/yii2-app-basic/blob/master/README.md#testing).