How to Unit Test Data Annotation Validators

gistfile1.txt

[TestMethod]
public void Description_Should_Be_Required()
{
    Expression<Func<MenuCategoryBusinessObject, object>> expression = 
        o => o.Description;
    var me = expression.Body as MemberExpression;
    var att = (RequiredAttribute[])me.Member
              .GetCustomAttributes(typeof(RequiredAttribute), false);
    att.Length.ShouldEqual(1);
}
ModelBinders.Binders.DefaultBinder = new DataAnnotationsModelBinder();