TDD in PHP - Memphis PHP 2011-08-25

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The document is a presentation about test-driven development (TDD) in PHP. It introduces TDD and the speaker, defines the TDD process, lists benefits and drawbacks, and demonstrates a live coding example of using TDD to build a calculator and tutor class. The example shows writing tests first, then code to pass the tests, and refactoring with confidence due to the tests. The goals are to provide a practical TDD example and demonstrate how TDD impacts design decisions.

About Me Jeremy Kendall PHP Developer since 2001 Organizer Memphis PHP Author at http://csiphp.com [email_address] @JeremyKendall http://about.me/jeremykendall

TDD in PHP: A Brief Example Test Driven Development, you say?

Why You Should Give A Damn ,[object Object]

” Test Driven Development (TDD) is a software development process that relies on the repetition of a very short development cycle . . .”

TDD Development Process ,[object Object]

Write just enough code to make the test pass

Without management and team buy-in, TDD is DOA

Unit testing and test-driven development are practices that makes it easy and efficient to create well-structured and well-working code. However, many software projects didn't create unit tests from the beginning. In this presentation I will show a test automation strategy that works well for legacy code, and how to implement such a strategy on a project. The strategy focuses on characterization tests and refactoring, and the slides contain a detailed example of how to carry through a major refactoring in many tiny steps

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TDD in PHP - Memphis PHP 2011-08-25

1. TDD in PHP: A Brief Example

2. About Me Jeremy Kendall PHP Developer since 2001 Organizer Memphis PHP Author at http://csiphp.com [email_address] @JeremyKendall http://about.me/jeremykendall

3. TDD in PHP: A Brief Example Test Driven Development, you say?

4. Frankly, my dear . . .

5. Frankly, my dear . . .

8. ” Test Driven Development (TDD) is a software development process that relies on the repetition of a very short development cycle . . .”

10. Run all tests, watch new test fail

11. Write just enough code to make the test pass

12. Run all tests, watch new test pass

13. Lather, rinse, repeat . . .

14. Refactor

15.

16. Confidence

17. Faster time to resolution

18. Documentation

19.

20. False sense of confidence

21. Without management and team buy-in, TDD is DOA

22.

23.

24. Demonstrate refactoring with confidence

25. Demonstrate TDD impact on design decisions

26.

27. Tutor class (consumes calculator)

28.

29.

30. Integer overflow

31.

32. TutoralculatorntegerCalculator

33.

34. Uses calculator class(es) to test responses

35.

36.

37. PHPUnit will be configured with phpunit.xml

38.

39. Tells PHPUnit where to look for our tests

40.

41. Registers simple autoloaders

42. LET'S GET IT ON!

43.

44. PHPUnit - http://www.phpunit.de/

45. Xdebug - http://www.xdebug.org/

46. The code example in this presentation was adapted for PHP from Przemysław Bielicki's TDD video tutorial at Agile Software Development. - http://bit.ly/byDZOA

47. Resources

48. Resources s

49. Resources

50.