NUnit Test Run Order

Question

By default nunit tests run alphabetically. Does anyone know of any way to set the execution order? Does an attribute exist for this?

Answer 1

I really like the previous answer.

I changed it a little to be able to use an attribute to set the order range:

namespace SmiMobile.Web.Selenium.Tests
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Reflection;
    using NUnit.Framework;

    public class OrderedTestAttribute : Attribute
    {
        public int Order { get; set; }


        public OrderedTestAttribute(int order)
        {
            Order = order;
        }
    }

    public class TestStructure
    {
        public Action Test;
    }

    class Int
    {
        public int I;
    }

    [TestFixture]
    public class ControllingTestOrder
    {
        private static readonly Int MyInt = new Int();

        [TestFixtureSetUp]
        public void SetUp()
        {
            MyInt.I = 0;
        }

        [OrderedTest(0)]
        public void Test0()
        {
            Console.WriteLine("This is test zero");
            Assert.That(MyInt.I, Is.EqualTo(0));
        }

        [OrderedTest(2)]
        public void ATest0()
        {
            Console.WriteLine("This is test two");
            MyInt.I++; Assert.That(MyInt.I, Is.EqualTo(2));
        }


        [OrderedTest(1)]
        public void BTest0()
        {
            Console.WriteLine("This is test one");
            MyInt.I++; Assert.That(MyInt.I, Is.EqualTo(1));
        }

        [OrderedTest(3)]
        public void AAA()
        {
            Console.WriteLine("This is test three");
            MyInt.I++; Assert.That(MyInt.I, Is.EqualTo(3));
        }


        [TestCaseSource(sourceName: "TestSource")]
        public void MyTest(TestStructure test)
        {
            test.Test();
        }

        public IEnumerable TestSource
        {
            get
            {
                var assembly =Assembly.GetExecutingAssembly();
                Dictionary> methods = assembly
                    .GetTypes()
                    .SelectMany(x => x.GetMethods())
                    .Where(y => y.GetCustomAttributes().OfType().Any())
                    .GroupBy(z => z.GetCustomAttribute().Order)
                    .ToDictionary(gdc => gdc.Key, gdc => gdc.ToList());

                foreach (var order in methods.Keys.OrderBy(x => x))
                {
                    foreach (var methodInfo in methods[order])
                    {
                        MethodInfo info = methodInfo;
                        yield return new TestCaseData(
                            new TestStructure
                                {
                                    Test = () =>
                                        {
                                            object classInstance = Activator.CreateInstance(info.DeclaringType, null);
                                            info.Invoke(classInstance, null);
                                        }
                                }).SetName(methodInfo.Name);
                    }
                }

            }
        }
    }
}