Unit-Tests

1. Unit-Tests Schnell und einfach selbst gemacht TobiasSchlitt <toby@php.net> PHP World Kongress 2009 2009-11-24 Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 1 / 25

2. About me Tobias Schlitt <toby@php.net> PHP since 2001 Freelancing consultant Qualiﬁed IT Specialist Studying CS at TU Dortmund (ﬁnishing mid 2010) OSS addicted eZ Components PHPUnit Various other projects . . . Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 2 / 25

3. Overview 1 Testing 2 PHPUnit 3 Advanced scenarios (optional) 4 The end Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 3 / 25

4. Outline 1 Testing Methods of testing Unit tests 2 PHPUnit 3 Advanced scenarios (optional) 4 The end Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 4 / 25

5. A little survey . . . Do you test? When? How? Who? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25

9. Ways of testing Automatic vs. manual Developer vs. tester Internal vs. external Back end vs. front end Code vs. appearance Functional vs. non-functional Dynamic vs. static Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 6 / 25

17. Test methods Unit tests Integration tests Regression tests Acceptance tests Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 7 / 25

18. Unit tests Validate functionality Test a single unit of code Avoid regressions Verify interfaces Test bugs dedicatedly Force code modularization Migrate safely Test driven development (TDD) Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 8 / 25

26. Outline 1 Testing 2 PHPUnit Installation PHPUnit basics Code examples 3 Advanced scenarios (optional) 4 The end Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 9 / 25

27. PHPUnit Port of JUnit to PHP Many enhancements Database tests Code coverage Data providers Invented by Sebastian Bergmann Standard for unit testing in PHP http://www.phpunit.de/ Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 10 / 25

28. Installation Via PEAR $ pear channel-discover pear.phpunit.de $ pear install phpunit/PHPUnit Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 11 / 25

29. PHPUnit basics YourClass Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25

30. PHPUnit basics YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25

31. PHPUnit basics YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25

32. PHPUnit basics TestCase YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25

33. PHPUnit basics TestRunner TestCase YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25

34. PHPUnit basics TestRunner TestCase YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25

35. Let’s dig into some code Let’s dig into some code Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 13 / 25

36. Outline 1 Testing 2 PHPUnit 3 Advanced scenarios (optional) Custom test environment Testing a WebDAV server Testing graphic generation Testing parsers 4 The end Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 14 / 25

37. eZ Component test runner Custom test runner Integrated auto loading Component base testing Run all tests Extended test case / suite classes Custom assertions Database testing Utility functions Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 15 / 25

38. eZ Webdav component Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 16 / 25

39. Semi-automatic regression tests Manual client test run Deﬁned test receipe Capture request / response data Replay request in unit tests Detect response regressions Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 17 / 25

40. Binary regressions Binary diﬀerences in generated images Test failures depending on PHP version GD version Operating system Images visually equivalent Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 18 / 25

41. Custom assertions Custom assertion Custom equality constraint Based on ImageMagick Allows deﬁned gap Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 19 / 25

42. Untestable code Parsers are highly dependant De-coupling hardly possible Huge amount of mock objects Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 20 / 25

43. Integration tests Test parser as a whole Small test ﬁles Manually create / validate Large overall tests Manual inspection of generated data Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 21 / 25

44. Outline 1 Testing 2 PHPUnit 3 Advanced scenarios (optional) 4 The end Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 22 / 25

45. Questions / Answers Questions? Feedback? Critics? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 23 / 25

46. The end I hope you enjoyed the session Slides and material http://schlitt.info/opensource http://www.slideshare.net/tobyS Contact: Tobias Schlitt <toby@php.net> Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 24 / 25

47. PHPUnderControl Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 25 / 25

Unit-Tests

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