Test your code like a pro - PHPUnit in practice
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The day you realised that you can’t really tell what your code does is the day you stop being an amateur programmer and you turn into a professional developer. During this workshop you will learn about the most famous unit testing framework – PHPUnit, how it can help you gain confidence in your code and what to do (and what to avoid) to make your code testable. We will discuss unit testing best practices and talk about tools that can help you automate the whole process, so it becomes more of a habit then a necessity.
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Test your code like a pro - PHPUnit in practice
- 1. Test your code like a pro PHPUnit in practice Sebastian Marek, Software Architect
- 2. Me a Pole living in Sheffield over 12 years in development big fan of process automation TDD and CI occasionally contributes to open source software
- 3. You? Who are you? What’s you typical environment you work in? What’s your experience in unit testing? What are your expectations?
- 4. Agenda Preparations / Setup Asserting exceptions Simple test case Asserting PHP Fixing first failure errors PHPUnit CLI options Asserting output Assertions Using data providers phpunit.xml file Generating code coverage report
- 5. Resources WIFI: phpnw12-phpunit hosts file: 192.168.254.55 phpnw12-tutorial http://phpnw12-tutorial
- 6. Rescue plan $ git clone http://phpnw12-tutorial/phpnw12-tutorial.git $ cd phpnw12-tutorial $ git reset --hard $ git pull origin exercise-<number>
- 7. Exercise 1 Simple test case repository structure src & tests naming conventions Tutorial.php and TutorialTest.php extends PHPUnit_Framework_TestCase
- 8. Exercise 1 -Simple test case Test first! namespace PhpNw12TestsWorkshop class TutorialTest method testGreetingsReturnWelcomeMessage() $ phpunit tests/Workshop/TutorialTest.php
- 9. Exercise 1 -Simple test case Code later! namespace PhpNw12Workshop class Tutorial method greetings() - empty for now $ phpunit tests/Workshop/TutorialTest.php
- 10. Exercise 1 -Simple test case Fix the code! method greetings() - implement the functionality $ phpunit tests/Workshop/TutorialTest.php
- 11. Exercise 1 -Simple test case Another test @test annotation method GetAttendeesReturnsListOfNames() assertInternalType() $ phpunit tests/Workshop/TutorialTest.php
- 12. Exercise 1 -Simple test case Implementation method getAttendees() - return empty array $ phpunit tests/Workshop/TutorialTest.php
- 13. Exercise 2 - Fixing the failure Refactoring add $_attendees property method getAttendees() return $_attendees $ phpunit tests/Workshop/TutorialTest.php
- 14. Exercise 2 - Fixing the failure Refactoring continues initialize $_attendees in the constructor $ phpunit tests/Workshop/TutorialTest.php
- 15. Exercise 2 - Fixing the failure Fix broken code assign default value in the constructor $ phpunit tests/Workshop/TutorialTest.php
- 16. Exercise 3 PHPUnit CLI options --colors --testdox --debug --filter
- 17. Exercise 4 - More assertions Testing booleans - part 1 new test testTutorialHasNoPlacesLeftWhenMoreThen3Attendees() assertFalse() new method arePlacesLeft() $ phpunit tests/Workshop/TutorialTest.php
- 18. Exercise 4 - More assertions Testing booleans - part 2 new test testTutorialHasPlacesLeftWhenLessThen3Attendees() assertTrue() $ phpunit tests/Workshop/TutorialTest.php
- 19. Exercise 4 - More assertions Testing numbers new test testTutorialIsNotFullWhenItNotExceedsMaximumCapacity() assertGreaterThan(), assertLessThan(), assertNotNull() $ phpunit tests/Workshop/TutorialTest.php
- 20. Exercise 4 - More assertions Refactor to add functionality new const MAX_CAPACITY new method getNumberOfAttendees() refactor arePlacesLeft() to use the above $ phpunit tests/Workshop/TutorialTest.php
- 21. Exercise 4 - More assertions Testing variable types new test testRoomIsAvailable() assertInstanceOf() new class Room new property $_room initialized in the constructor $ phpunit tests/Workshop/TutorialTest.php
- 22. Exercise 4 - More assertions Testing arrays new test testAttendeeGotAddedToTheList() assertContains() new test testGetAtendeesReturnCorrectNumberOfAttendees() assertCount() $ phpunit tests/Workshop/TutorialTest.php
- 23. Exercise 5 - phpunit.xml phpunit.xml.dist vs phpunit.xml
- 24. Exercise 6 Asserting exceptions new test testAddAttendeeThrowsExceptionWhenAddingNewPersonToFullTutorial() setExpectedException() new method addAttendee() $ phpunit
- 25. Exercise 6 Asserting exceptions Refactor to add functionality refactor arePlacesLeft() refactor method addAttendee() $ phpunit
- 26. Exercise 6 Asserting exceptions Using annotations @expectedException @expectedExceptionMessage @expectedExceptionCode $ phpunit
- 27. Exercise 6 Asserting exceptions Using try...catch catching exceptions using conventional methods fail() $ phpunit
- 28. Exercise 7 Asserting errors Testing PHP errors new test testInitiatingTutorialWithWrongParamThrowsError() PHP errors converted to PHPUnit_Framework_Error $ phpunit
- 29. Exercise 7 Asserting errors Testing PHP warnings/notices new method Room::includeDependencies() new test testIncludeDependenciesThrowsWarningForMissingFiles() PHP warnings converted to PHPUnit_Framework_Error_Warning PHP notices converted to PHPUnit_Framework_Error_Notice $ phpunit
- 30. Exercise 8 Asserting output new test testDisplayShowsGreetingsMessage() new method displaySummary() expectOutputString() $ phpunit
- 31. Exercise 9 Data providers new provider provideListOfAttendeesNotExceedingMaximumTutorialCapacity() modify test testTutorialIsNotFullWhenItExceedsMaximumCapacity() @dataProvider $ phpunit
- 32. Exercise 10 Code coverage --coverage-html forceCoversAnnotation @covers $ phpunit --coverage-html=/tmp/phpnw12-tutorial