利用Rhino Mock实现串口程序的单元测试

原来Mock可以这样子用。

1.   接口ISerialPort

    public interface ISerialPort
    {
        string PortName { get; }
        int BaudRate { get; }
        int DataBits { get; }
        Parity Party { get; }
        StopBits StopBits { get; }
        int BytesToRead { get; }
        bool IsOpen { get; }
        void Open();
        void Close();
        string ReadLine();
        int ReadByte();
        int Read(ref byte[] buffer, int offset, int count);
        string ReadTo(string p);
        void Write(byte[] data, int offset, int count);
    }

2. 用Rhino Mock测试串口

        [TestMethod()]
        public void ReadAlarmTest()
        {
            MockRepository mock = new MockRepository();
            ISerialPort serialPort = mock.StrictMock<ISerialPort>();
            VSerialPort target = new VSerialPort(serialPort);
            string excepted ="1,1,1,";
            string actual = string.Empty;
            StringBuilder sb = new StringBuilder();
            target.OnReceiveData += (alarmNo) =>{ sb.Append(alarmNo);sb.Append(',');};
            using (mock.Record())
            {
                byte[] data = GetAlarmData();
                byte[] outData = new byte[data.Length];
                serialPort.Expect(p => p.ReadByte()).Return(0x21);
                serialPort.Expect(p => p.Write(new byte[] {1,0x64,0x0D}, 0, 3));
                serialPort.Expect(p => p.BytesToRead).Return(data.Length);
                serialPort.Expect(p => p.Read(ref outData, 0, outData.Length)).OutRef(data).Return(data.Length);
                serialPort.Expect(p => p.BytesToRead).Return(0);
            }
            target.ReadAlarm();
            actual = sb.ToString();
            Assert.AreEqual(excepted, actual);
        }
        
        static byte[] GetAlarmData()
        {
            List<byte> data = new List<byte>();
            data.Add(1);
            data.AddRange(Encoding.ASCII.GetBytes("ALARM MON #01=001 \r\n$\r\n"));
            data.Add(1);
            data.AddRange(Encoding.ASCII.GetBytes("ALARM MON #01=001 \r\n$\r\n"));
            data.Add(1);
            data.AddRange(Encoding.ASCII.GetBytes("ALARM MON #01=001 \r\n$\r\n"));
            data.Add(1);
            data.AddRange(Encoding.ASCII.GetBytes("$\r"));
            data.Add(1);
            data.AddRange(Encoding.ASCII.GetBytes("000\r\n"));
            return data.ToArray();
        }