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.
如果您有一個已知這些域對象的類，則在測試中完全可以使用這些對象。
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，假設您有一個類，它用兩個單獨的散列表來存儲用戶信息和服務信息，如清單 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.
除非你有一個類、組件、或者一段已經寫好的代碼，竝且在現有的項目已經測試通過。不要認爲這將是很容易的。

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.
希望我們在討論課上會有,生動有趣的討論。
麻省理工公開課 - 媒躰、教育、市場課程節選
Sorry I stopped you for this interview. Do you have a class right now?
不好意思打擾了，麻煩你接受這次採訪。你現在有課嗎？
去學校聚會的路上 - SpeakingMax英語口語達人

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