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Creating test doubles, or mocks, is a feature of PHPUnit that I recently discovered and am quickly falling in love with. Previously I would find other ways to mock my system, like creating SQLite connections instead of a persistent database, or even duplicating an entire mock class for injection.…
A problem that I've run into during the unending quest for complete test coverage is mocking of internal PHP functions. Unit tests are easy to write as long as a class method returns everything it does, but when a method starts to call out to certain internal PHP functions things get difficult. It's…