How do I write a TDD test for removing a field from a Java class?

Question

I have a Java class with three fields. I realized I only need two of them due to changes in requirements.

Ideally I'd write a failing test case before modifying code.

Is there a standard way, or should I just ignore TDD for this task?

Answer 1

That's refactoring, so you don't need to start with failing tests.

1. Find all the methods using the field.
2. Make sure that they're covered by unit tests.
3. Refactor the methods so they no longer use the field.
4. Remove the field.
5. Ensure that the tests are running.