Testing the Rails application controllers aims to ensure all requests coming from the Web browser are answered as expected, based on the user input, while producing the appropriate state changes.
对 Rails 应用程序控制器进行测试的目的是，确保来自 Web 浏览器的所有请求都根据用户的输入得到了符合预期的响应，并产生适当的状态修改。
Selenium is a robust set of tools that support rapid development of test automation for web-based applications. To add Selenium testing support to your application, execute the commands shown below.
Selenium是一组功能强大的工具，它支持基于web应用程序测试自动化的快速开发。
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