Assert.AreEqual C# (CSharp) Method

		public static int AreEqual (string a, string b, string comment)
		{
			if (a != b) {
				Console.WriteLine ("[{3}]{0}Expected: {0}{1}{0}Actual: {0}{2}",
					Environment.NewLine, a, b, comment);
				throw new Exception ();
			}
			return 0;
		}

        public void Tuple2Test()
        {
            bool isExecuted1 = false;

            (string, int)tuple = ("a", 0);
            Func <int, int> addOne = x => { isExecuted1 = true; return(x + 1); };

            (string, int)query1 = from x in tuple select addOne(x); // Execution.

            Assert.IsTrue(isExecuted1);                             // Immediate execution.

            Assert.AreEqual("a", query1.Item1);
            Assert.AreEqual(0 + 1, query1.Item2);
            Assert.IsTrue(isExecuted1);

            // Functor law 1: F.Select(Id) == Id(F)
            Assert.AreEqual(tuple.Select(Functions.Id).Item1, Functions.Id(tuple).Item1);
            // Functor law 2: F.Select(f2.o(f1)) == F.Select(f1).Select(f2)
            Func <int, string> addTwo = x => (x + 2).ToString(CultureInfo.InvariantCulture);

            (string, string)query2 = tuple.Select(addTwo.o(addOne));
            (string, string)query3 = tuple.Select(addOne).Select(addTwo);
            Assert.AreEqual(query2.Item1, query3.Item1);
        }