using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;

namespace FluentAssertions
{
    [TestClass]
    public class FluentAssertionTest
    {
        private Exception exception = new ArgumentNullException();

        [TestMethod]
        public void This_should_work_but_it_does_not()
        {
            // TestMethod fails: Expected type to be System.ArgumentNullException, 
            // but found FluentAssertions.Primitives.ObjectAssertions.
            exception.Should().NotBeNull().And.Should().BeOfType<ArgumentNullException>();
        }

        [TestMethod]
        public void This_works()
        {
            exception.Should().NotBeNull();
            exception.Should().BeOfType<ArgumentNullException>();
        }
    }
}