public void TestQueryModeSwitches2()
        {
            //Arrange
            arithS AS = new arithS();
            int    modeSwitches;

            //Act
            AS.switchMode();
            AS.switchMode();
            modeSwitches = AS.queryModeSwitches();
            //Assert
            Assert.AreEqual(2, modeSwitches);
        }
        public void TestSwitchModes2()
        {
            //Arrange
            arithS AS = new arithS();
            string mode;

            //Act
            AS.switchMode();
            AS.switchMode();
            mode = AS.getMode();
            //Assert
            Assert.AreEqual("stuck", mode);
        }