test.cs

[Test]
public static void Class_AllStaticMethodsShouldBeDecoratedWithDebuggerStepThroughAttribute()
{
    var methods = from m in typeof(Mooble.Util.StringExtensions).GetMethods()
                    where !m.IsSpecialName && m.IsStatic &&
                        m.GetCustomAttributes(typeof(DebuggerStepThroughAttribute), true).Count() == 0
                    select m.Name;

    if (methods.Count() > 0)
    {
        var list = methods.Aggregate((first, second) => first + ", " + second);
        Assert.Fail("Some methods (" + list + ") should be decorated with DebuggerStepThroughAttribute");
    }
}