Unit Tests Unit Tests in Symfony2 in Symfony2 Marek Kalnik Marek Kalnik 

2 Symfony is one of the few Symfony is one of the few PHP projects (...) promoting PHP projects (...) promoting radical changes to the way radical changes to the way developers work developers work Fabien Potencier Fabien Potencier 

3

Orders

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Orders

”; } } ?> $row['label']$row['value'] PHP began with code like that (me too) PHP began with code like that (me too) 

4

Orders

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Orders

”; } } ?> $row['label']$row['value'] We want to improve our work We want to improve our work DIFFICULT TO REUSE SECURITY RISK NO SEPARATION OF CONCERNS NOT TESTED! 

5 We have to participate in the We have to participate in the changes introduced by Symfony changes introduced by Symfony 

6 We should unit test our We should unit test our applications applications 

Unit tests Unit tests it is not only testing it is not only testing 

8 Impact on development Impact on development According to university study by David S. Janzen[1]: According to university study by David S. Janzen[1]: ● reduces the number of lines of code reduces the number of lines of code ● improves productivity improves productivity ● less effort per line-of-code less effort per line-of-code ● improves code structure improves code structure ● makes developer more confident about their work makes developer more confident about their work [1] http://src.acm.org/subpages/gf_entries_06/DavidJanzen_src_gf06.pdf 

9 TDD – even better TDD – even better Further improves the code stability and quality: Further improves the code stability and quality: ● http://research.microsoft.com/en-us/groups/ese/nagappan_tdd.pdf http://research.microsoft.com/en-us/groups/ese/nagappan_tdd.pdf ● http://research.microsoft.com/en-us/groups/ese/fp17288-bhat.pdf http://research.microsoft.com/en-us/groups/ese/fp17288-bhat.pdf ● and others... and others... Most successful Theodo Most successful Theodo projects were written using projects were written using the TDD technique. the TDD technique. 

Symfony2 Symfony2 Test Culture Test Culture 

11 Symfony2 tests Symfony2 tests • early versions ~5100 tests early versions ~5100 tests • today ~9000 tests today ~9000 tests • Documentation! Documentation! • http://symfony.com/doc/current/book/testing.html http://symfony.com/doc/current/book/testing.html • http://symfony.com/doc/current/cookbook/testing/index.html http://symfony.com/doc/current/cookbook/testing/index.html • http://symfony.com/doc/current/cookbook/form/unit_testing.html http://symfony.com/doc/current/cookbook/form/unit_testing.html 

12 Interesting TestCases Interesting TestCases • FormComponent::FormIntegrationTestCase FormComponent::FormIntegrationTestCase • FormComponent::TypeTestCase FormComponent::TypeTestCase • *PerformanceTestCase *PerformanceTestCase • LocaleComponent::TestCase LocaleComponent::TestCase • FosUserBundle::FosUserExtensionTest FosUserBundle::FosUserExtensionTest • getFullConfig, getEmptyConfig getFullConfig, getEmptyConfig   • TheodoRogerCmsBundle ;-) TheodoRogerCmsBundle ;-) 

13 Read The Read The Docs Docs Tests! Tests! 

So how do you do it? So how do you do it? 

15 Tools Tools PHPUnit running and writing the tests because it's the industry standard Phake (https://github.com/mlively/Phake) mocking because PHPUnit mocks are not flexible enough 

16 Install Install // composer.json require-dev: { “phpunit/phpunit”: “*”, “phake/phake”: “*” } // composer.json require-dev: { “phpunit/phpunit”: “*”, “phake/phake”: “*” } 

17 tests.bootstrap.php tests.bootstrap.php

18 the setUp the setUp securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } } securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } } 

19 the mock the mock securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } public function testChecksIfCmsShouldBeEnabled() { Phake::when($this->securityContext)->isGranted('ROLE_ADMIN', null) ->thenReturn(true); } } securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } public function testChecksIfCmsShouldBeEnabled() { Phake::when($this->securityContext)->isGranted('ROLE_ADMIN', null) ->thenReturn(true); } } 

20 the test the test securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } public function testChecksIfCmsShouldBeEnabled() { Phake::when($this->securityContext)->isGranted('ROLE_ADMIN', null) ->thenReturn(true); $this->assertTrue($this->enabler->isEnabled()); Phake::verify($this->securityContext, Phake::times(1))->isGranted('ROLE_ADMIN', null); } } securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } public function testChecksIfCmsShouldBeEnabled() { Phake::when($this->securityContext)->isGranted('ROLE_ADMIN', null) ->thenReturn(true); $this->assertTrue($this->enabler->isEnabled()); Phake::verify($this->securityContext, Phake::times(1))->isGranted('ROLE_ADMIN', null); } } 

21 and more and more securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } public function testChecksIfCmsShouldBeEnabled() { Phake::when($this->securityContext)->isGranted('ROLE_ADMIN', null) ->thenReturn(true); $this->enabler->setEnv('cms'); $this->assertTrue($this->enabler->isEnabled()); $this->enabler->setEnv('prod'); $this->assertFalse($this->enabler->isEnabled()); Phake::verify($this->securityContext, Phake::times(1))->isGranted('ROLE_ADMIN', null); } } securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } public function testChecksIfCmsShouldBeEnabled() { Phake::when($this->securityContext)->isGranted('ROLE_ADMIN', null) ->thenReturn(true); $this->enabler->setEnv('cms'); $this->assertTrue($this->enabler->isEnabled()); $this->enabler->setEnv('prod'); $this->assertFalse($this->enabler->isEnabled()); Phake::verify($this->securityContext, Phake::times(1))->isGranted('ROLE_ADMIN', null); } } 

22 group group securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } securityContext = Phake::mock('Symfony\Component\Security\Core\SecurityContextInterface'); $this->enabler = new CmsEnablerExtension($this->securityContext); } $ bin/phpunit -c app/ --group unit $ bin/phpunit -c app/ --group unit 

23 other stuff other stuff refactor your tests – it's a code to maintain too! use fixtures (Alice, Phaker) ! be close to production 

Questions ? Questions ?