Simple Event Throttling Requirement Expressed as a Test

EventThrottlingTest.cs

 [TestFixture]
    public class TestEventThrottling
    {
        [Test]
        public void EventsAreThrottled()
        {
            var fq = new Frequent();
            int counter = 0;
            fq.PropertyChanged += (s, e) => { counter++; };
            foreach (var prop in Enumerable.Range(0, 200))
                fq.Property = prop.ToString();
            Thread.Sleep(1000);
            Assert.AreEqual(1, counter, "Since throttled at 1/sec");
        }
}