Explain then how testing the functionality (not the new one; regressions included, this is not a school exercise) is faster than checking the code.
Are you writing black box testing by hand, or manually checking, everything that would normally be a unit test? We have unit tests precisely because of how unworkable the “every test is black box” approach is.
Are you writing black box testing by hand, or manually checking, everything that would normally be a unit test? We have unit tests precisely because of how unworkable the “every test is black box” approach is.