Migrating / Upgrading NUnit to Team system

Question

We are working on a C# windows application that is being upgraded from .Net 1.1 to 3.5. The application uses NUnit for automated testing and we are in turn changing this to Team System 2008.

• It seems to me that NUnit uses similar attributes and code for assertion?
• What is the best way to upgrade / migrate this code and are their any procedures to avoid?

Answer 1

Here's how attributes map from NUnit to MSTest

[TestFixture] -> [TestClass]
[Test] -> [TestMethod]
[SetUp] -> [TestInitialize]
[TearDown] -> [TestCleanup]
[TestFixtureSetUp] -> [ClassInitialize]
[TestFixtureTearDown] -> [ClassCleanup]

You can consider adding something like

using TestClassAttribute = NUnit.Framework.TestFixtureAttribute;
using TestAttribute = NUnit.Framework.TestMethodAttribute;

to the top of your test classes.

Answer 2

Mainly, converting between test frameworks is a "[Ctrl]+H" (replace all) job. However...

I think the word "upgrade" may be confusing. I've used both, and in many ways NUnit has a lead on MSTest. The biggest advantage of MSTest is (IMO) with the team-coverage integration in the IDE - but you can get this with your existing NUnit tests via TestDriven.NET (Test With -> Team Coverage).

Things to watch out for with MSTest:

• it needs a solution file to hold the testrunconfig etc
• you need to add extra attributes (or entries in the testrunconfig) to deploy files to the test folder (it doesn't just use the output "bin" folder)
• instrumentation needs a special config