public static void Test_Returns_False_After_Sucessful_Authentication_And_Then_Removal()
        {
            //arrange
            Mock <ISigningService> signingService = new Mock <ISigningService>();

            signingService.Setup(x => x.isSigned(It.IsAny <byte[]>(), It.IsAny <byte[]>()))
            .Returns(true);

            ElevationManager      elevationManager = new ElevationManager(Mock.Of <ILog>(), signingService.Object);
            IElevatableSession    session          = Mock.Of <IElevatableSession>();
            AuthenticationMessage message          = new AuthenticationMessage(new byte[0]);

            session.UniqueAuthToken = elevationManager.RequestSingleUseToken(session);

            //act:Preform a authentication
            elevationManager.TryAuthenticate(session, message);

            //now revoke it
            elevationManager.TryRevokeAuthentication(session);

            //assrt
            Assert.False(elevationManager.isElevated(session));
        }