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thePHP.cc:
PHPUnit 4.5 and Prophecy
February 06, 2015 @ 13:56:21

On thePHP.cc blog today Sebastian Bergmann has posted about the new release of PHPUnit (4.5) and how it now comes with support for the Prophecy mocking tool.

PHPUnit has had built-in support for creating test doubles for many years. This implementation was originally inspired by the first generation of mocking frameworks for Java. Since then mocking frameworks have evolved. Modern mocking frameworks are more intuitive to use, lead to more readable code, and may even allow for a clear separation of a test double's configuration and the actual test double object itself.

Like many users of PHPUnit I am not satisfied with the API of PHPUnit's own mocking framework. This dissatisfaction has lead to the development of alternative mocking frameworks for PHP such as Mockery, Phake, or Prophecy. If I were to create a new mocking framework today it would probably look a lot like Prophecy. Which is why PHPUnit 4.5 introduced out-of-the-box support for it.

He gets into some of the basics of the Prophecy tool and how it handles mocking differently than the current internal mocking PHPUnit provides. Some code examples are included showing dummies, stubs and mocks with an example of the output when some of the "predictions" have failed.

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phpunit version upgrade prophecy mock dummy stub framework

Link: http://thephp.cc/news/2015/02/phpunit-4-5-and-prophecy

Inviqa techPortal:
PHP Test Doubles Patterns with Prophecy
July 23, 2013 @ 12:31:08

The Inviqa techPortal has a new post today from Marcello Duarte about using Prophecy in unit testing to work with mocks and doubles.

Test doubles are a way of replacing all classes in our tests other than the one we are testing. They give us control on direct and indirect outputs that would have been generated by those classes. Understanding the role of the test double helps us to write better tests, and thus better code. [...] When writing unit tests we are focusing on describing one unit of behaviour at a time, and how objects communicate in order to achieve that behaviour. We instantiate the object under test, call a method of the object and observe if the outcome is as expected.

In his examples he uses Prophecy to mock out different kinds of objects - a dummy object, a "fake" (with listeners for other object calls), a stub that mocks other internal method calls and a more familiar mock object. He also talks about two guidelines to follow when thinking about writing tests and code complexity - the Law of Demeter and "Don't Mock What You Don't Own." He gives an example of working around this last one by using the Adapter design pattern.

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prophecy unittest designpattern doubles mock stub dummy fake

Link: http://techportal.inviqa.com/2013/07/23/php-test-doubles-patterns-with-prophecy


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