NUnit: Debugging Test Code

Debugging Unit Tests Using TestDriven.NET

• Download and install TestDriven.NET Visual Studio add-in. This can be downloaded from TestDriven.NET website.
• Open the solution in Visual Studio.
• Right click on the test class and select the "Test with Debugger" option.

Debugging Unit Tests Using the Visual Studio Debugger

• Set the testing project as the startup project in the Visual Studio solution. Right click on the project and select "Set as StartUp Project" option.
• Open the project properties of the project, and select Debug option.
• Set the "Start Action" to "Start external program" and select the nunit.exe.
• Place a breakpoint anywhere in the test code that will be tested.
• Run the application in debug mode (Press F5 Key)
• The NUnit application should open.
• Run the tests you want to debug and let the debugger stop at the relevant breakpoint.