public void TestDisconnect()
        {
            var session = new MockTaskSession();

            session.VerifyStart();

            session.VerifyCommand(() => session.Disconnect(), "Disconnect()");

            // Force an exception.
            session.ExceptionMode = true;
            session.AllFail       = true;
            Assert.Throws <X3270ifCommandException>(() => session.Disconnect());

            session.Close();
        }