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Unit-Tests

Tobias Schlitt, profile picture
Tobias Schlitt

The document discusses unit testing and PHPUnit. It introduces unit testing concepts and methods like unit, integration, and regression tests. It provides an overview of PHPUnit functionality for writing and running tests. Advanced scenarios covered include custom testing environments, testing a WebDAV server, and challenges of testing parsers. The presentation encourages the use of unit testing to improve code quality.

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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
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
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
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
A little survey . . . Do you test? When? How? Who? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25
A little survey . . . Do you test? When? How? Who? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25
A little survey . . . Do you test? When? How? Who? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25
A little survey . . . Do you test? When? How? Who? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25
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
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
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
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
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
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
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
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
Test methods Unit tests Integration tests Regression tests Acceptance tests Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 7 / 25
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
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
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
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
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
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
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
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
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
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
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
PHPUnit basics YourClass Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25
PHPUnit basics YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25
PHPUnit basics YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25
PHPUnit basics TestCase YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25
PHPUnit basics TestRunner TestCase YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25
PHPUnit basics TestRunner TestCase YourClass YourClassTest Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 12 / 25
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
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
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
eZ Webdav component Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 16 / 25
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
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
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
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
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
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
Questions / Answers Questions? Feedback? Critics? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 23 / 25
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
PHPUnderControl Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 25 / 25

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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
  • 6. A little survey . . . Do you test? When? How? Who? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25
  • 7. A little survey . . . Do you test? When? How? Who? Tobias Schlitt (PHP World Kongress 2009) Unit-Tests 2009-11-24 5 / 25
  • 8. 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
  • 10. 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
  • 11. 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
  • 12. 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
  • 13. 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
  • 14. 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
  • 15. 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
  • 16. 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
  • 19. 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
  • 20. 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
  • 21. 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
  • 22. 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
  • 23. 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
  • 24. 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
  • 25. 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