TDD — A New Transformation

In this article, I question whether there is a transformation missing from the Transformation Priority Premise (TPP). In my last article, I implemented a simple function which checked whether the input number was odd or even. The goal of the exercise was to strictly adhere to the TDD cycle while also making sure I had all the tests I wanted at the end. This exercise lead to an impasse problem, where I couldn’t write the next failing test without changing the behaviour.

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To get beyond this impasse, I changed the behaviour in the refactor stage and claimed that it was OK to do so because it enabled the next step in the unfinished process…. Continue

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