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Unit Tests

There is one part of development that can be quite tedious - creating unit tests. In this section we shall use GitHub Copilot to help.

Create unit test​

  • Switch to Test project and open UnitTest1.cs.

  • Ask Copilot Chat the following:

 Write a unit test using MSTEST to validate the ColorUtilities.ValidateHexCode function.  
 I need to test all scenerios / edge cases / errors.  
 Test for both 3 and 6 character hexcodes - test for valid and invalid values.  
 Separate the tests.
  • Just copy in the [TestMethods].

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  • Load the Test blade and hit refresh icon.

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  • Run Tests.

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Depending on the code for hexcode validation - the Test for 3 digit Hexcodes may fail . And our validate code never tested for a null value.

  • Use Copilot to fix the validation routine. Select the code and ask:
Fix this code .  Make it resilient.

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  • Re-run unit tests ... make sure they now all pass.

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