gistfile1.cs

using System.Dynamic;

using Machine.Specifications;

namespace ClassLibrary1
{
  public class DynamicClass
  {
    public dynamic DoSomething()
    {
      dynamic foo = new ExpandoObject();
      foo.Bar = "baz";
      return foo;
    }
  }

  public class When_Context
  {
    static DynamicClass Sut;
    static dynamic Result;
    Establish context = () => { Sut = new DynamicClass(); };

    Because of = () => { Result = Sut.DoSomething(); };

    It should_ = () => Result.Bar.ShouldEqual("baz");
  }
}


using ClassLibrary1;

using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace TestProject1
{
  [TestClass]
  public class UnitTest1
  {
    [TestMethod]
    public void TestMethod1()
    {
      DynamicClass Sut;
      dynamic Result;
      Sut = new DynamicClass();

      Result = Sut.DoSomething();

      Assert.AreEqual(Result.Bar, "baz");
    }
  }
}