如何对转换库进行单元测试? [英] How to unit test a conversion library?

问题描述

我刚刚开始使用 C# 进行单元测试.
我已经阅读了很长时间关于单元测试的文章，而且我已经在玩 NUnit，但这是我第一次尝试为真正的代码编写真正的测试.

I'm just starting out with unit testing in C#.
I have been reading about unit testing for a long time now, and I've already been playing around with NUnit, but this is the first time that I actually try to write real tests for real code.

但我的问题是:
我很难想出我可以实际测试的东西.

But my problem is:
I'm having a hard time to come up with things that I can actually test.

我要测试的项目是一个转换库(将 POCO 列表转换为 ADO 记录集).

The project I want to test is a conversion library (to convert lists of POCOs to ADO Recordsets).

到目前为止，我只提出了两个要测试的东西:

So far, I've come up with only two things to test:

• 如果记录集完全存在(非 Null，非空)
• 如果每个字段的内容都一样(--> if RS!Foo == POCO.Foo)

所以，我的问题是:

• 当我的代码只是将 A 转换为 B 时，我还能测试什么?
• 或者这个项目太小/太简单/不是一个很好的例子来编写多个有意义的单元测试?

推荐答案

有很多东西需要测试.我还建议考虑并可能进行验证:

There are quite a few things to test. I would also suggest thinking about and potentially verifying:

• POCO 的私有字段没有正确映射
• 列表中的无效条目正确抛出异常
• 记录集长度正确
• 根据需要处理 POCO 中的继承(即:基类成员按预期映射)

• Private fields of POCO don't map through correctly
• Invalid entries in the list throw exceptions correctly
• Recordset length is correct
• Inheritance in POCO is handled as desired (ie: base class members map through as expected)

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