Test Driven Test Driven DevelopmentDevelopment

Part 1Gamal Shaaban Gamal Shaaban International CentersOrange Labs CairoMobile Applications & Software Development

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Questions?

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Fact?

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Session-1Session-1

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• Why TDD• Quality In Time and Cost• Cost To Change

• Steps To TDD• Red Green Refactor Cycle• Write Red Test• Write Green Code• Do Refactoring Code

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Why TDD: Quality TriangleWhy TDD: Quality Triangle

• TDD benefits

o Clean Designo Fast Feedbacko Concrete Evidence That

Your Software Workso Write Better Codeo Reduced Gold-Platingo Regression Test Suite

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Cost To Change ChartCost To Change Charthttp://www.agilemodeling.com/essays/costOfChange.htm

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Steps To TDDSteps To TDD

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Red Green Refactor Red Green Refactor CycleCycle

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Write fail tests, make test passes, refactor your code, repeat this action

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How To Do TDDHow To Do TDD

1. Analyze the requirements and write the list of tasks or features

2. Pick a task or feature

3. Brainstorm a list of tests for the task or feature

4. Review the tests list and pick a test

5. Write the test case

6. Run the test case and see it fails to compile

7. Write only enough code that the test case compiles

8. Run the test and see running the code fails

9. Write only enough code to just pass the test

10.Refactor the production code and eliminate duplication

11.Repeat

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Questions?

thanks