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A short talk about Mockery, how to start using it, what are it's different parts, some gotchas and real-life examples that are bit more complicated than what fits into the official documentation.

Presented at the phpnl15 uncon.


January 24, 2015

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  1. Problems with unit testing • Code that uses 3rd party

    services and APIs • Databases • Parts of our code that are not relevant to the code we are testing
  2. How do we fix it? • Avoid calls to the

    database • Avoid calls to 3rd party services and APIs • Avoid calls to parts of our own code • Mock out the moving bits
  3. What to use? • A mocking framework • PHPUnit's built-in

    mock stuff • FBMock • Phake • ...
  4. What's Mockery? • A framework to mock objects • Easy

    to use with PHPUnit (and maybe other unit testing tools?) • Makes mocking a lot saner than the built-in PHPUnit stuff • Developed by @padraicb and lots of help from @davedevelopment
  5. A simple example • Foo has a dependency on Bar

    • Foo calls a method on Bar that returns something • We don't want to call the real Bar's method, but a mock • This gets more complicated in real life
  6. Expectations for method calls • shouldReceive('methodName'); • once(), twice(), zeroOrMoreTimes(),

    times(n), never() • If no expectation is set on the number of calls, it will surprise you.
  7. Argument validation • with($param1, $param2); • withAnyArgs(); • withNoArgs(); •

    with(m::type('\Foo\Bar')); • with(m::on(closure)); • with($regex);
  8. Mocking hard dependencies • You know all those “new” statements

    in your legacy code? • http://robertbasic.com/blog/mocking-hard- dependencies-with-mockery • https://github.com/robertbasic/mockery- hard-dependency
  9. Crazy bits • Doesn't do a diff on method arguments

    that are arrays • Reflection can go nuts with PHP classes • __magic methods... yea, don't.