title: Is there hard evidence of the ROI of unit testing?
body: <p>Unit testing sounds great to me, but I'm not sure I should spend any time really learning it unless I can convince others that is has significant value.  I have to convince the other programmers and, more importantly, the bean-counters in management, that all the extra time spent learning the testing framework, writing tests, keeping them updated, etc.. will pay for itself, and then some.</p>
  
  <p>What proof is there?  Has anyone actually developed the same software with two separate teams, one using unit testing and the other not, and compared the results?  I doubt it.  Am I just supposed to justify it with, "Look it up on the Internet, everybody's talking about it, so it must be the right thing to do"?</p>
  
  <p>Where is the hard evidence that will convince the laymen that unit testing is worth the effort?</p>