public void TestSubstractOneMinusTwo()
        {
            var ycw = new YouCanWork();
            var result = ycw.YouCanSubstract(1, 2);

            Assert.AreEqual(-1, result, "Substract 1 minus 2");
        }
        public void TestAddOnePlusOne()
        {
            var ycw = new YouCanWork();
            var result = ycw.YouCanAdd(1, 1);

            Assert.AreEqual(2, result, "Add 1 plus 1");
        }
        public void TestSubstractOneMinusOne()
        {
            var ycw = new YouCanWork();
            var result = ycw.YouCanSubstract(1, 1);

            Assert.AreEqual(0, result, "Substract 1 minus 1");
        }
        public void TestAddOnePlus3()
        {
            var ycw = new YouCanWork();
            var result = ycw.YouCanAdd(1, 3);

            Assert.AreEqual(4, result, "Add 1 plus 3");
        }