关于与其他方法组合的存根方法的问题

Question

   def foo
     a & b & c & d
   end

And it is very important for application logic, so I have to write good test for it. Methods a,b,c,d are already tested. Should I prepare full data to make a,b,c,d work and return requested values, or stubbing in this case is enougth?

Answer 1

A unit test should only test the method under test, ie foo. This means, you should stub a, b, c and d.
To make it of any use, you should make sure, that you cover all corner cases that could result from the return values of those methods.

Answer 2

如果您真的想对此进行全面测试，我将编写两种自动测试： 单元测试 ，它将a，b，c和d作为存根接收；以及一个集成测试 ，该测试将确保所有逻辑都可以很好地协同工作。没有集成问题。

Answer 3

I appreciate your desire to test thoroughly, but a unit test of this using stubs would only test that the & operator works properly. That operator is not your code.

If you use mocks instead of stubs, it would at least test that all the methods are called, but that's really only sort of a documentation test.

An integration test using data might however be useful.