have a class

基本解释

If you have a class that already knows about the domain objects, it is fine to use these objects in your tests.
如果您有一个已知这些域对象的类，则在测试中完全可以使用这些对象。
For example, suppose that you have a class that stores user information and service information in two separate hash tables, as shown in Listing 3.
例如，假设您有一个类，它用两个单独的散列表来存储用户信息和服务信息，如清单 3 所示。
Unless you have a class, component, or piece of code already coded...and has been tested thoroughly...and is in production from an existing project, don't think it will be easy.
除非你有一个类、组件、或者一段已经写好的代码，并且在现有的项目已经测试通过。不要认为这将是很容易的。

And many have. Yet now comes a study showing an increase in the number of injuries in "phys ed" class.
And we do have a class I hope there'll be lively and Interesting discussion about some of these issues.
希望我们在讨论课上会有,生动有趣的讨论。
麻省理工公开课 - 媒体、教育、市场课程节选
Sorry I stopped you for this interview. Do you have a class right now?
不好意思打扰了，麻烦你接受这次采访。你现在有课吗？
去学校聚会的路上 - SpeakingMax英语口语达人

This will allow us to have a class course in India, for example, and broadcast it to Brussels and Nairobi at the same time.
UNESCO: Indigenous Peoples