In Chapter 7, Testing Web Applications, you learned how to write unit tests in order to test small pieces of code in an isolated way. Even though this is a must, it is not enough alone to make sure your application works as it should. The scope of your test could be so small that even though the algorithm that you test makes sense, it would not be what the business asked you to create.

Acceptance tests were born in order to add this level of security to the business side, complementing the already existing unit tests. In the same way, BDD originated from TDD in order to write code based on these acceptance tests in an attempt to involve business and managers in the development process. As PHP is one of the favorite languages of web developers, it is just natural to find powerful tools to implement BDD in your projects. You will be positively surprised by what you can do with Behat and Mink, the two most popular BDD frameworks at the moment.

In this chapter...