Knowing how to compile PHP will open one of the few doors necessary for contributing to the PHP language. Once you get familiar with this it will be much easier for you to contribute in many ways such as running tests and uploading reports, writing new tests by yourself and bug reporting/fixing.
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5 Ways to Extract Value from Overmocked Tests
Tomas shares his approach to get the most out of mocks, drop dead code, and make tests more valuable. Read more