Switching Between Using NUnit and MSTest for Unit Testing

Question

How can I configure a .NET solution (C#, .NET 2.0) to to allow other developers to make use of the same unit tests for the solution using either NUnit or MSTest?

Ba

Answer 1

If you don't want to change any test code (i.e. don't want to add the aliasing at the top), this shim works for me:

using System;
using System.Collections;

namespace Microsoft.VisualStudio.TestTools.UnitTesting
{
    public class Placeholder{}
    public class TestClassAttribute : NUnit.Framework.TestFixtureAttribute
    {
    }
    public class TestInitializeAttribute : NUnit.Framework.SetUpAttribute
    {
    }
    public class TestMethodAttribute : NUnit.Framework.TestAttribute
    {
    }
    public class TestCleanupAttribute : NUnit.Framework.TearDownAttribute
    {
    }
    public class IgnoreAttribute : NUnit.Framework.IgnoreAttribute
    {
    }
    public class ExpectedExceptionAttribute : NUnit.Framework.ExpectedExceptionAttribute
    {
        public ExpectedExceptionAttribute(Type exceptionType) : this(exceptionType, null)
        {
        }
        public ExpectedExceptionAttribute(Type exceptionType, string message) : base(exceptionType)
        {
            UserMessage = message;
        }
    }
    public class TestContext : NUnit.Framework.TestContext
    {
        public TestContext(IDictionary dictionary) : base(dictionary)
        {
        }
    }
    public class Assert : NUnit.Framework.Assert
    {
        public static void IsInstanceOfType(object obj, Type type)
        {
            NUnit.Framework.Assert.IsInstanceOfType (type, obj, null);
        }
        public static void IsInstanceOfType(object obj, Type type, string message)
        {
            NUnit.Framework.Assert.IsInstanceOfType (type, obj, message);
        }
    }
    public class CollectionAssert : NUnit.Framework.CollectionAssert
    {
    }
}

This has worked for me to run MSTest via NUnit (at least under mono with Xamarin Studio). Just include the file and get references right (you may need a different project file or conditional references), and you're good.