namespace TestExample
{
    public class ClassWithEvents
    {
        internal event EventHandler<EventArgs> InternalEventToTest;
    }

    [TestClass()]
    public class EventTests
    {
        [TestMethod]
        public void ClassWithEvents_InternalEventTest()
        {
            //Arrange
            bool eventRaised = false;
            ClassWithEvents classWithEvents = Mock.Create<ClassWithEvents>();
            classWithEvents.InternalEventToTest += (object sender, EventArgs e) =>
            {
                eventRaised = true;
            };

            // Act
            Mock.Raise(() => classWithEvents.InternalEventToTest += null, new EventArgs());

            // Assert
            Assert.IsTrue(eventRaised);
        }
    }
}