Create a Test Project

• Open Visual Stuio > Click ‘Create a New Project’
• Search "xunit
  • Note: the general principles of unit testing can be applied to nunit project or even a regular Microsoft test project.
• Select xUnit Test Project
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  • Click Create

 

 

This will create a Default Class ‘UnitTest1’ and a default method as below

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• [Fact] Annotation
  • This is what tells the IDE, the program everything that here is just a unit test. Don't factor this into the entire runtime of the application.
• Steps in Unit Test
  • A unit test usually has three steps to it.
    • Arrange.
      • A stage at which 
        • All data is prepared,
        • Test artefacts are prepared. 
        • Create objects or representations of whatever data we would expect to be testing against.
    • Act
      • Here we're going to actually simulate a call to the method that we hope should be called when we enact such an action.
    • Assert
      • Here we have to assert that this is the outcome with this input to this method. 
      • Is this happen Or Not?
        • If we said this should happen and it did not happen, that test will basically fail, show red. 
        • Then we'll have to either write the code to make it green

 

 

 

Test Explorer

•  Visual Studio makes it very easy to navigate through tests because they give us a test explorer.
• View > Test Explorer
• What is the user of Test Explorer
  • An interface that 
    • shows us all of the unit tests that are pending, 
    • shows us all of the test projects, one, all of the unit tests in said projects.
    • Allow us to run these tests.