"As a programmer, I am frequently amazed by the difference between coding with programmer tests and coding without them. I find myself taking extremely small steps when I write code. In fact, I don't have to debug very much when I'm taking small enough steps, because the source of a problem becomes obvious: it's got to be that line of code I just wrote. The phenomenal thing to me is that writing a test first quite often drives me to create the simplest code possible," says Roy Miller in this IBM DeveloperWorks article:
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