"I have a mind like a steel... uh... thingy." Patrick Logan's weblog.

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Thursday, January 27, 2005

Testing Interfaces

Another blog item on testing.

This one asks whether the tests themselves should alter the interface of what's being tested. i.e. should the test have a back door for peeking into the black box.

My opinion is, emphatically, no. Not for the kinds of tests created while test-first programming.

An impulse to check on the internal state of an object while test-first programming is an indication of one or two things:

  • The test is being perceived too much as "testing" and not enough as "designing".
  • The object itself is probably too complex. Fix the design.

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About Me

Portland, Oregon, United States
I'm usually writing from my favorite location on the planet, the pacific northwest of the u.s. I write for myself only and unless otherwise specified my posts here should not be taken as representing an official position of my employer. Contact me at my gee mail account, username patrickdlogan.