using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace HengshanTerminalWrapper_Test
{
    [TestClass]
    public class StateMachineMessageCutterUnitTest
    {
        [TestMethod]
        public void NoneStarter_Should_Never_Succeed_TestMethod0()
        {
            var msgCutTimes = 0;
            var invalidMsgCutTimes = 0;
            var input = new byte[] { 0x00, 0x02, 0xA0, 0xA0 };
            Dfs.WayneChina.HengshanTerminalWrapper.StateMachineMessageCutter cutter
                = new Dfs.WayneChina.HengshanTerminalWrapper.StateMachineMessageCutter();
            cutter.OnMessageCut += (c, cc) =>
            {
                msgCutTimes++;
            };
            cutter.OnInvalidMessageRead += (i, ii) => { invalidMsgCutTimes++; };
            cutter.Feed(input);
            Assert.AreEqual(0, msgCutTimes, "msg cut times is: " + msgCutTimes);
            Assert.AreEqual(4, invalidMsgCutTimes, "invalid msg cut times is: " + invalidMsgCutTimes);
        }

        [TestMethod]
        public void NoneStarter_Should_Never_Succeed_TestMethod1()
        {
            var msgCutTimes = 0;
            var invalidMsgCutTimes = 0;
            var input = new byte[] { 0x00, 0x02, 0xA0, 0xA0, 0xFF };
            Dfs.WayneChina.HengshanTerminalWrapper.StateMachineMessageCutter cutter
                = new Dfs.WayneChina.HengshanTerminalWrapper.StateMachineMessageCutter();
            cutter.OnMessageCut += (c, cc) =>
            {
                msgCutTimes++;
            };
            cutter.OnInvalidMessageRead += (i, ii) => { invalidMsgCutTimes++; };
            cutter.Feed(input);
            Assert.AreEqual(0, msgCutTimes, "msg cut times is: " + msgCutTimes);
            Assert.AreEqual(4, invalidMsgCutTimes, "invalid msg cut times is: " + invalidMsgCutTimes);
        }

        [TestMethod]
        public void NoneStarter_Should_Never_Succeed_TestMethod2()
        {
            var msgCutTimes = 0;
            var invalidMsgCutTimes = 0;
            var input = new byte[] { 0x00, 0x02, 0xA0, 0xA0, 0xFF, 0x02, 0x00, 0x01 };
            Dfs.WayneChina.HengshanTerminalWrapper.StateMachineMessageCutter cutter
                = new Dfs.WayneChina.HengshanTerminalWrapper.StateMachineMessageCutter();
            cutter.OnMessageCut += (c, cc) =>
            {
                msgCutTimes++;
            };
            cutter.OnInvalidMessageRead += (i, ii) => { invalidMsgCutTimes++; };
            cutter.Feed(input);
            Assert.AreEqual(1, msgCutTimes, "msg cut times is: " + msgCutTimes);
            Assert.AreEqual(4, invalidMsgCutTimes, "invalid msg cut times is: " + invalidMsgCutTimes);
        }
    }
}