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- 1. TDD FlowTDD Flow @dionatanmoura TheMantra in ActionThe Mantra in Action
- 2. TDD Flow The Mantrain Action ● eXtreme Programming ● Test-Driven Development (TDD) ● Mantra ● TDD Patterns – Red patterns – Green patterns – Refactoring patterns ● Hands-on
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- 5. http://commons.wikimedia.org/wiki/File:Creador_de_la_metodologia_xp.jpg “Test-Driven Development (TDD)is a style of development that drives development with tests” Kent Beck
- 7. TDD is theshortest cycleTDD is the shortest cycle in agile developmentin agile development
- 8. TDD Rules 1. Writenew code only if you first have a failing automated test 2. Eliminate duplication
- 9. Write a smallautomated test that fails Red Code just enough to make the test pass GreenRemove duplication and refactor to clean code Refactor The Mantra in Action!
- 10. TDD = TFD+ Refactoring;
- 11. TFD Test First Development TDD = TFD+ Refactoring;
- 12. Refactoring To restructure software byapplying a series of refactorings without changing its observable behavior. Martin Fowler http://martinfowler.com TDD = TFD + Refactoring;
- 13. Refactoring for TDD ObservableBehavior == Tests
- 14. “The goal ofTDD is clean code that works.” Ron Jeffries https://twitter.com/RonJeffries
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- 20. TDD Patterns Test n. Testfor TDD is a noum (n.) which means a procedure to acceptance (or not) that runs automatically
- 21. TDD Patterns Test List Whatshould I test? Write a list of all known tests that will be needed to be implemented.
- 22. TDD Patterns Test First Whenshould I write a test? Before I code.
- 23. TDD Patterns Assert First Whenshould I write the assert? First.
- 24. TDD Patterns Test Data Howdo I represent the intent of the data? With a meaningful relationship between the expect and the actual result.
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- 26. Red Bar Patterns OneStep Test Which test should I pick from the list? Learning X Confidence
- 27. Red Bar Patterns StarterTest Which test should I start? By a variation of the operation that doesn’t do anything, returning a constant. Outside-in (skeleton)
- 28. Red Bar Patterns ExplanationTest How to spread test automation? Ask for and give explanations in terms of tests.
- 29. Red Bar Patterns LearningTest How to learn from externally produced software? Write a test before use that software.
- 30. Red Bar Patterns AnotherTest How to discuss something off topic? Add a test to the list, and go back to the current test.
- 31. Red Bar Patterns RegressionTest What to do with a reported bug? Write a small test that fails that bug.
- 32. Red Bar Patterns Break Whatto do when I feel tired or stuck? Take a break.
- 33. Red Bar Patterns Doover What to do when I feel lost? Throw away the code and start over.
- 34. Red Bar Patterns Cheapdesk, Nice chair What is the physical setup for TDD? A really nice chair mostly.
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- 36. Testing Patterns Child Test Howto get a too big test case running? Write the smallest test case that represents the broken part of the bigger test case, and make it run. Go back to the big test case.
- 37. Testing Patterns Mock Object Howto test something that relies on an expensive or complicated resource? Create a fake version of the resource.
- 38. Testing Patterns Crash TestDummy How to test error codes difficult to be invoked? Create a fake object for that.
- 39. Testing Patterns Broken Test Howto leave a programming session (alone)? Leave the last test broken.
- 40. Testing Patterns Clean Check-in Howto leave a programming session (in pair or in a team)? Leave all the tests running.
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- 42. Green Bar Patterns FakeIt (‘til you make it) What is the first implementation to make a test pass? Return a constant.
- 43. Green Bar Patterns Triangulate Howto drive abstraction? Abstract when you have two or more examples.
- 44. Green Bar Patterns ObviousImplementation How should I implement simple operations? Just implement them.
- 45. Green Bar Patterns Oneto Many How to implement with collections? Implement first without collections. Then make it work with collections.
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- 48. xUnit Patterns Assertion Boolean expressionswith assert(); Fixture Common objects for the tests with setUp(); External Fixture Release external resources with tearDown(); Test Method Represents a test case Exception Test Fail(); if the exception is not thrown AllTests Suite of all suites
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- 51. JUnit Test Infected: ProgrammersLove Writing Tests http://junit.sourceforge.net/doc/testinfected/testing.htm
- 52. Is TDD onlyabout Unit Testing?
- 53. Is TDD a testingtechnique?
- 54. “The focus ofTDD is design. Test is a (nice) side effect.” Marco Trincardi
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- 57. “To me theessence of the question I think about that, thinking about software design, I don't care about TDD or not TDD.” Kent Beck, Is TDD dead? Part II.
- 58. Does TDD leadyou to a good design?
- 59. "TDD isn't takingyou anywhere. You're making the decisions." Kent Beck, Is TDD dead? Part II.
- 60. How to learn(more) TDD?
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- 64. Kata: DSL, Java andANTLR
- 65. Kata: Testing JavaKata:Testing Java Web ApplicationsWeb Applications outside the containeroutside the container
- 66. Kata: In-ContainerKata: In-Container TestingJava withTesting Java with ArquillianArquillian
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- 68. “Worried that TDDwill slow down your programmers? Don't. They probably need slowing down.” J. B. Rainsberger
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- 72. TDD FlowTDD Flow @dionatanmoura TheMantra in ActionThe Mantra in Action