Unit Test Serial Port: Find which Serial port is open to test a piece of hardware.

unit-test-serial-port.cs

using System;
using System.IO.Ports;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using CardDispenser;

namespace CardDispenserTests
{
    [TestClass]
    public class CardDispenerTests
    {
        private SerialPort GetSp()
        {
            // try COM1
            string port = "COM1";
            var sp = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);

            // try COM2
            if (!sp.IsOpen)
            {
                port = "COM2";
            }
            sp = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);

            // try COM3
            if (!sp.IsOpen)
            {
                port = "COM3";
            }
            sp = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);

            // try COM4
            if (!sp.IsOpen)
            {
                port = "COM3";
            }
            sp = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);

            return sp;

        }
        
        [TestMethod]
        public void ResetTest()
        {
            //// run test app to determine port. This test is looking for Comport 3
            SerialPort sp = GetSp();

            

            IMD1000A imd1000A = new MD1000ADriver();
            MD1000AHelper.Reset(imd1000A, ResetAction.Capture_Card, sp);

            Assert.AreEqual((Int32)ResetAction.Capture_Card, 49);
        }

    }
}