Unit Tests And Automated Testing

Unit Tests And Automated Testing

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  Unit Tests &Automated TestingLee Englestone presents..www.manchesterdeveloper.com
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  AgendaTerminologyWhat, Why, HowAutomatingunit tests & testingAdvanced stuffTest driven development (TDD)Code coverageWhat we wont be coveringContinuous Integration (in any depth)
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  Terminology (for thenext hour)Unit testTests a small bit of code (from code)Integration testTest after addition of codeSystem test / functional testTest for adherence to user requirements Regression testTest that fixing / adding code hasn’t introduced bugsContinuous integrationAutomated checkout, building and testing of code from source controlSource : Lee & Wikipedia
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  Why should weTEST?Why should we test at all?££REMEMBERTesting is just one step in QA£££££
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  Testing different layersBusinessLogicUnit TestsWeb UISelenium
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  Three tier architectureWebUIASPX, ASCX, HTML, Flash,EpiServer Page Templates etcBusiness LogicCode libraries (DLLs)Business Logic (DLL)Database accessData Access Layer
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  Testing business logicCodelibraries (DLLs)Business Logic (DLL)Unit Tests (DLL)Unit Tests (DLLs)Database accessData Access Layer
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  Why have unittests?Why have unit tests?Find bugs early / fast feedbackIncrease QAWhy not to have unit testsIncreases development time?CostOfWritingUnitTests < Sum(BugFixing)
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  Unit Testing isnot a Silver Bullet
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  What is aunit test?“..tests if individual units of source code are fit for use.”Should beSmallSpecific (only test 1 thing)Clear pass / fail criteria
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  What does aunit test look like? Using NUnit.Framework;[TestFixture]public class CarTests{ [Test] public void Test_Car_Paint () { // ArrangeColor paint = Color.Red; Car car = new Car(); // Actcar.paint(Color.Red); // AssertAssert.AreEqual(car.Color, paint); } …}ArrangeActAssert
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  Example unit test: RunningRunning unit tests manually with NUnit
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  An example scenario{Code Example }ObjectsCarPropertiesColorColordouble Valuedouble FuelLeveldouble FuelCapacityFuelTypeEnumFuelTypeMethodsCar.Crush()Car.Paint(Color)Car.AddFuel(FuelTypeEnum, double)Car.VeryImportantMethod()
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  Automating unit testing
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  Testing Web UI(Selenium)What if we want to test the UI? Manual recording and runningCan export to NUnitExamples : Community Fund FormH1 checking**{ Code Example }
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  Test driven development(TDD)Write your tests, even BEFORE your code!Make sure all tests initially failThen implement the code that the tests are testing(Encourages Designing for Testing)
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  Code coverageWhat %of your code base are you testing?
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  Summary Test as earlyas possibleDesign code to testSeparate BL from UIImprove QAMake unit tests part of CI
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  AppendixesWikipedia testing definitions
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  Testing Terminology (Wikipedia)Unittest“..a programmer tests if individual units of source code are fit for use.”Integration test“..individual software modules are combined and tested as a group. It occurs after unit testing and before system testing.”System test / functional test“..testing conducted on a complete, integrated system to evaluate the system's compliance with its specified requirements. Regression test“..seeks to uncover software errors by partially retesting a modified program. The intent of regression testing is to assure that a bug fix has been successfully corrected .. , while providing a general assurance that no other errors were introduced in the process of fixing the original problem.”Continuous integrationAutomated checkout, building and testing of code from source controlSource : Wikipedia