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Everybody knows that automated testing is a good thing.
Not everybody knows exacly what to test.
My question is if native validations like validate_presence_of, validate_uniqueness_of and so on should be tested in the application.
In my office we are three, one thinks it should be tested, one thinks it shouldn´t and I am up in the air.
Yes.
Testing that a model attribute is present or not is only testing the validates_presence_of code as a by-product of the real test which is that the validates_presence_of exists within your model.
If someone commented out a bunch of validation code and then forgot to uncomment it then this would go undetected and could cause all sorts of problems.
I test them, not because I think they don’t work but to ensure that they are present in my model when required.