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Unit testing and test driven development using vs
 

Unit testing and test driven development using vs

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    Unit testing and test driven development using vs Unit testing and test driven development using vs Presentation Transcript

    • Unit Testing and Test Driven Development Using VS 2010
      Abhimanyu Singhal
      Lead Consultant
      iMentor Knowledge Services
    • Introduce Unit Testing Features
      How to create Team Test unit tests.
      Generating the unit test method stubs for an assembly
      Using a test driven development (TDD)
      Objectives
    • Thinking about tests pushes developer to understand better the gathered requirements
      Reduces the over engineered code (dead code)
      Unit Tests help to check that any new modification wont break the existing features.
      TDD increases software flexibility
      TDD code is more decoupled
      Why is TDD Good
    • A Visual Studio integrated unit-testing framework
      Code generation of test method stubs.
      Running tests within the IDE.
      Incorporation of test data loaded from a database.
      Code coverage analysis once the tests have run.
      Visual Studio Team Test
    • Designates a Method as a Test Method
      Found in Microsoft.VisualStudio.QualityTools.UnitTesting.Framework Namespace
      TestMethod has to be an instance method with no paramters
      Method name is irrelevant because reflection searches for TestMethod Attribute
      TestMethodAttribute Class
    • Class containing the test method is designated TestClass Attribute
      • Found in Microsoft.VisualStudio.QualityTools.UnitTesting.Framework Namespace
      • Team Test Uses Reflection to find Class with TestClass Attribute and Method with TestMethod Attribute and runs it
      TestClassAttribute Class
    • From Visual Studio
      As Part of Build Process
      From Command Line
      Running and Executing Tests
    • Takes a Parameter which is Exception Type to watch for
      If Exception does not occur test fails
      The Second parameter (string) is optional is the error message displayed when exception is not thrown
      ExpectedException Attribute
    • Use Test Properties Window
      Add TestData Attribute
      Source Type
      Connection String
      TableName
      DataAccessMethod
      Loading Test Data From Database
    • Provides associated data through
      DataRow Property
      TestDirectory, TestName
      Mesuring Test Time using
      BeingTimer()
      EndTimer()
      The TestContext
    • Determines how much code is tested
      Shows Percentage of Code Executed
      Highlights code to show which lines are executed
      Code Coverage
    • TestInitialize Attribute
      TestCleanup Attribute
      Code to be run before and after each test method
      Other Attributes for Lifetime Methods
      AssemblyInitializeAttribute/AssemblyCleanupAttribute
      ClassInitializeAttribute/ClassCleanupAttribute.
      Initializing and Cleaning Up Tests
    • The Testing Framework
    • Keep Testing Code in Separate Assemblies
      Check for cleanup during test setup and execute the cleanup prior to the setup as necessary
      Avoid creating dependencies between tests, each test should be autonomous.
      Create one test class corresponding to each class within the production code.
      Avoid creating other machine dependent tests
      Create mock objects to test interfaces
      Guidance – Unit Testing
    • To update the attendance for the session and obtain learning credits log on to https://ch1workspaces/sites/SW23/MS_Course_nominations/default.aspx
      Question and Answers Session
    • Thank You
      abhimanyu@imentor.co.in
      @abhi_singhal
      http://www.imentor.co.in/blog
    • iMentor Knowledge Services