public void GetPriorityTest_CorrectJuniorPriority(ArithmeticSign signLoverPriority, ArithmeticSign signHigherPriority)
        {
            int actualLoverPriority  = signLoverPriority.GetPriority();
            int actualHigherPriority = signHigherPriority.GetPriority();

            Assert.IsTrue(actualLoverPriority < actualHigherPriority, $"Sign priority: {signLoverPriority} < {actualHigherPriority}");
        }
        public void GetPriorityTest_CorrectEqualityPriority(ArithmeticSign signPriority, ArithmeticSign signPriorityOther)
        {
            int actualPriority      = signPriority.GetPriority();
            int actualPriorityOther = signPriorityOther.GetPriority();

            Assert.IsTrue(actualPriority == actualPriorityOther, $"Sign priority: {signPriority} == {signPriorityOther}");
        }