How to quickly debug a NUnit test in Visual Studio

//-------------------------------------------------------------------------------------
// <copyright file='CodeFileTests.cs' company='Jonno'>
//     Copyright (c) Paul Johnson 2009 (email:paulmichael.johnson@gmail.com)
//     Code is released under The Code Project Open License (CPOL).
// </copyright>
//-------------------------------------------------------------------------------------

namespace Jonno.AddIns.Entities.UnitTests
{
    using Jonno.AddIns.Entities;
    using NUnit.Framework;

    [TestFixture]
    public class CodeFileTests
    {        
        /// <summary>
        /// The system under test;
        /// </summary>
        private CodeFile sut;

        [Test]
        public void IfFileIsAssemblyInfoShouldSetFlag()
        {
            this.sut = new MockCodeFile(@"c:\swsws\sws\AssemblyInfo.cs");
            Assert.That(this.sut.IsAssemblyInfo, Is.EqualTo(true), "true");

            this.sut = new MockCodeFile(@"c:\swsws\sws\Someclass.cs");
            Assert.That(this.sut.IsAssemblyInfo, Is.EqualTo(false), "false");
        }

        [Test]
        public void IfFileIsCSharpShouldSetFlag()
        {
            this.sut = new MockCodeFile(@"c:\swsws\sws\AssemblyInfo.cs");
            Assert.That(this.sut.IsCSharpFile, Is.EqualTo(true), "true");

            this.sut = new MockCodeFile(@"c:\swsws\sws\Someclass.vb");
            Assert.That(this.sut.IsCSharpFile, Is.EqualTo(false), "false");
        }

        [Test]
        public void IfFileIsVBShouldSetFlag()
        {
            this.sut = new MockCodeFile(@"c:\swsws\sws\AssemblyInfo.vb");
            Assert.That(this.sut.IsVBFile, Is.EqualTo(true), "true");

            this.sut = new MockCodeFile(@"c:\swsws\sws\Someclass.cs");
            Assert.That(this.sut.IsVBFile, Is.EqualTo(false), "false");
        }

        [Test]
        public void ShouldSetExtension()
        {
            this.sut = new MockCodeFile(@"c:\swsws\sws\AssemblyInfo.vb");
            Assert.That(this.sut.Extension, Is.EqualTo(".vb"));

            this.sut = new MockCodeFile(@"c:\swsws\sws\AssemblyInfo.cs");
            Assert.That(this.sut.Extension, Is.EqualTo(".cs"));

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeXML.xml");
            Assert.That(this.sut.Extension, Is.EqualTo(".xml"));
        }

        [Test]
        public void ShouldSetFilenameWithoutExtension()
        {
            this.sut = new MockCodeFile(@"c:\swsws\sws\AssemblyInfo.vb");
            Assert.That(this.sut.FileNameWithoutExtension, Is.EqualTo("AssemblyInfo"));

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeClass.cs");
            Assert.That(this.sut.FileNameWithoutExtension, Is.EqualTo("SomeClass"));

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeXML.xml");
            Assert.That(this.sut.FileNameWithoutExtension, Is.EqualTo("SomeXML"));
        }

        [Test]
        public void ShouldSetShortname()
        {
            this.sut = new MockCodeFile(@"c:\swsws\sws\AssemblyInfo.vb");
            Assert.That(this.sut.ShortName, Is.EqualTo("AssemblyInfo.vb"));

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeClass.cs");
            Assert.That(this.sut.ShortName, Is.EqualTo("SomeClass.cs"));

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeXML.xml");
            Assert.That(this.sut.ShortName, Is.EqualTo("SomeXML.xml"));
        }
        
        [Test]
        public void IfVborCSharpFileShouldGetText()
        {
            var expected = "Public class Paul { public void jjj() {  } }";

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeClass.cs", expected);
            Assert.That(this.sut.Text, Is.EqualTo(expected));

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeClass.vb", expected);
            Assert.That(this.sut.Text, Is.EqualTo(expected));

            this.sut = new MockCodeFile(@"c:\swsws\sws\SomeXMl.xml", expected);
            Assert.That(this.sut.Text, Is.EqualTo(string.Empty));
        }
    }
}