Andreas Müller
5f3f934b89
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1181 lines
32 KiB
C#
1181 lines
32 KiB
C#
using System.Reflection;
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using AMWD.Protocols.Modbus.Common.Protocols;
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namespace AMWD.Protocols.Modbus.Tests.Common.Protocols
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{
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[TestClass]
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public class RtuOverTcpProtocolTest
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{
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private const byte UNIT_ID = 0x2A; // 42
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#region Read Coils
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[TestMethod]
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public void ShouldSerializeReadCoils()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act
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var bytes = protocol.SerializeReadCoils(UNIT_ID, 19, 19);
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// Assert
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Assert.IsNotNull(bytes);
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Assert.HasCount(14, bytes);
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// Transaction id
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Assert.AreEqual(0x00, bytes[0]);
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Assert.AreEqual(0x01, bytes[1]);
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// Protocol identifier
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Assert.AreEqual(0x00, bytes[2]);
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Assert.AreEqual(0x00, bytes[3]);
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// Following bytes
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Assert.AreEqual(0x00, bytes[4]);
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Assert.AreEqual(0x08, bytes[5]);
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// Unit id
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Assert.AreEqual(UNIT_ID, bytes[6]);
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// Function code
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Assert.AreEqual(0x01, bytes[7]);
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// Starting address
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Assert.AreEqual(0x00, bytes[8]);
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Assert.AreEqual(0x13, bytes[9]);
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// Quantity
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Assert.AreEqual(0x00, bytes[10]);
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Assert.AreEqual(0x13, bytes[11]);
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// CRC check will be ignored
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}
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[TestMethod]
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[DataRow(0)]
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[DataRow(2001)]
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public void ShouldThrowOutOfRangeForCountOnSerializeReadCoils(int count)
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadCoils(UNIT_ID, 19, (ushort)count));
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}
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[TestMethod]
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public void ShouldThrowOutOfRangeForStartingAddressOnSerializeReadCoils()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadCoils(UNIT_ID, ushort.MaxValue, 2));
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}
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[TestMethod]
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public void ShouldDeserializeReadCoils()
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{
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// Arrange
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int[] setValues = [0, 2, 3, 6, 7, 8, 9, 11, 13, 14, 16, 18];
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var protocol = new RtuOverTcpProtocol();
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// Act
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var coils = protocol.DeserializeReadCoils([0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x03, 0xCD, 0x6B, 0x05, 0x00, 0x00]);
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// Assert
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Assert.IsNotNull(coils);
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Assert.HasCount(24, coils);
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for (int i = 0; i < 24; i++)
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{
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Assert.AreEqual(i, coils[i].Address);
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if (setValues.Contains(i))
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Assert.IsTrue(coils[i].Value);
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else
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Assert.IsFalse(coils[i].Value);
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}
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}
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[TestMethod]
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public void ShouldThrowExceptionOnDeserializeReadCoils()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ModbusException>(() => protocol.DeserializeReadCoils([0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x02, 0xCD, 0x6B, 0x05, 0x00, 0x00]));
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}
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#endregion Read Coils
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#region Read Discrete Inputs
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[TestMethod]
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public void ShouldSerializeReadDiscreteInputs()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act
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var bytes = protocol.SerializeReadDiscreteInputs(UNIT_ID, 19, 19);
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// Assert
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Assert.IsNotNull(bytes);
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Assert.HasCount(14, bytes);
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// Transaction id
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Assert.AreEqual(0x00, bytes[0]);
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Assert.AreEqual(0x01, bytes[1]);
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// Protocol identifier
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Assert.AreEqual(0x00, bytes[2]);
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Assert.AreEqual(0x00, bytes[3]);
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// Following bytes
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Assert.AreEqual(0x00, bytes[4]);
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Assert.AreEqual(0x08, bytes[5]);
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// Unit id
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Assert.AreEqual(UNIT_ID, bytes[6]);
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// Function code
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Assert.AreEqual(0x02, bytes[7]);
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// Starting address
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Assert.AreEqual(0x00, bytes[8]);
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Assert.AreEqual(0x13, bytes[9]);
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// Quantity
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Assert.AreEqual(0x00, bytes[10]);
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Assert.AreEqual(0x13, bytes[11]);
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// CRC check will be ignored
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}
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[TestMethod]
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[DataRow(0)]
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[DataRow(2001)]
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public void ShouldThrowOutOfRangeForCountOnSerializeReadDiscreteInputs(int count)
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadDiscreteInputs(UNIT_ID, 19, (ushort)count));
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}
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[TestMethod]
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public void ShouldThrowOutOfRangeForStartingAddressOnSerializeReadDiscreteInputs()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadDiscreteInputs(UNIT_ID, ushort.MaxValue, 2));
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}
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[TestMethod]
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public void ShouldDeserializeReadDiscreteInputs()
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{
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// Arrange
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int[] setValues = [0, 2, 3, 6, 7, 8, 9, 11, 13, 14, 16, 18];
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var protocol = new RtuOverTcpProtocol();
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// Act
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var discreteInputs = protocol.DeserializeReadDiscreteInputs([0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x02, 0x03, 0xCD, 0x6B, 0x05, 0x00, 0x00]);
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// Assert
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Assert.IsNotNull(discreteInputs);
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Assert.HasCount(24, discreteInputs);
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for (int i = 0; i < 24; i++)
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{
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Assert.AreEqual(i, discreteInputs[i].Address);
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if (setValues.Contains(i))
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Assert.IsTrue(discreteInputs[i].Value);
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else
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Assert.IsFalse(discreteInputs[i].Value);
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}
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}
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[TestMethod]
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public void ShouldThrowExceptionOnDeserializeReadDiscreteInputs()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ModbusException>(() => protocol.DeserializeReadDiscreteInputs([0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x02, 0x02, 0xCD, 0x6B, 0x05, 0x00, 0x00]));
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}
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#endregion Read Discrete Inputs
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#region Read Holding Registers
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[TestMethod]
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public void ShouldSerializeReadHoldingRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act
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var bytes = protocol.SerializeReadHoldingRegisters(UNIT_ID, 107, 2);
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// Assert
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Assert.IsNotNull(bytes);
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Assert.HasCount(14, bytes);
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// Transaction id
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Assert.AreEqual(0x00, bytes[0]);
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Assert.AreEqual(0x01, bytes[1]);
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// Protocol identifier
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Assert.AreEqual(0x00, bytes[2]);
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Assert.AreEqual(0x00, bytes[3]);
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// Following bytes
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Assert.AreEqual(0x00, bytes[4]);
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Assert.AreEqual(0x08, bytes[5]);
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// Unit id
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Assert.AreEqual(UNIT_ID, bytes[6]);
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// Function code
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Assert.AreEqual(0x03, bytes[7]);
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// Starting address
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Assert.AreEqual(0x00, bytes[8]);
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Assert.AreEqual(0x6B, bytes[9]);
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// Quantity
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Assert.AreEqual(0x00, bytes[10]);
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Assert.AreEqual(0x02, bytes[11]);
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// CRC check will be ignored
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}
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[TestMethod]
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[DataRow(0)]
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[DataRow(126)]
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public void ShouldThrowOutOfRangeForCountOnSerializeReadHoldingRegisters(int count)
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadHoldingRegisters(UNIT_ID, 19, (ushort)count));
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}
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[TestMethod]
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public void ShouldThrowOutOfRangeForStartingAddressOnSerializeReadHoldingRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadHoldingRegisters(UNIT_ID, ushort.MaxValue, 2));
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}
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[TestMethod]
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public void ShouldDeserializeReadHoldingRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act
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var registers = protocol.DeserializeReadHoldingRegisters([0x00, 0x01, 0x00, 0x00, 0x00, 0x09, UNIT_ID, 0x03, 0x04, 0x02, 0x2B, 0x00, 0x64, 0x00, 0x00]);
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// Assert
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Assert.IsNotNull(registers);
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Assert.HasCount(2, registers);
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Assert.AreEqual(0, registers[0].Address);
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Assert.AreEqual(555, registers[0].Value);
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Assert.AreEqual(1, registers[1].Address);
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Assert.AreEqual(100, registers[1].Value);
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}
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[TestMethod]
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public void ShouldThrowExceptionOnDeserializeReadHoldingRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ModbusException>(() => protocol.DeserializeReadHoldingRegisters([0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x03, 0x04, 0x02, 0x2B, 0x00, 0x00]));
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}
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#endregion Read Holding Registers
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#region Read Input Registers
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[TestMethod]
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public void ShouldSerializeReadInputRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act
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var bytes = protocol.SerializeReadInputRegisters(UNIT_ID, 107, 2);
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// Assert
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Assert.IsNotNull(bytes);
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Assert.HasCount(14, bytes);
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// Transaction id
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Assert.AreEqual(0x00, bytes[0]);
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Assert.AreEqual(0x01, bytes[1]);
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// Protocol identifier
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Assert.AreEqual(0x00, bytes[2]);
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Assert.AreEqual(0x00, bytes[3]);
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// Following bytes
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Assert.AreEqual(0x00, bytes[4]);
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Assert.AreEqual(0x08, bytes[5]);
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// Unit id
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Assert.AreEqual(UNIT_ID, bytes[6]);
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// Function code
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Assert.AreEqual(0x04, bytes[7]);
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// Starting address
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Assert.AreEqual(0x00, bytes[8]);
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Assert.AreEqual(0x6B, bytes[9]);
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// Quantity
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Assert.AreEqual(0x00, bytes[10]);
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Assert.AreEqual(0x02, bytes[11]);
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// CRC check will be ignored
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}
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[TestMethod]
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[DataRow(0)]
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[DataRow(126)]
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public void ShouldThrowOutOfRangeForCountOnSerializeReadInputRegisters(int count)
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadInputRegisters(UNIT_ID, 19, (ushort)count));
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}
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[TestMethod]
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public void ShouldThrowOutOfRangeForStartingAddressOnSerializeReadInputRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadInputRegisters(UNIT_ID, ushort.MaxValue, 2));
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}
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[TestMethod]
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public void ShouldDeserializeReadInputRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act
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var registers = protocol.DeserializeReadInputRegisters([0x00, 0x01, 0x00, 0x00, 0x00, 0x09, UNIT_ID, 0x04, 0x04, 0x02, 0x2B, 0x00, 0x64, 0x00, 0x00]);
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// Assert
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Assert.IsNotNull(registers);
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Assert.HasCount(2, registers);
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Assert.AreEqual(0, registers[0].Address);
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Assert.AreEqual(555, registers[0].Value);
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Assert.AreEqual(1, registers[1].Address);
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Assert.AreEqual(100, registers[1].Value);
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}
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[TestMethod]
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public void ShouldThrowExceptionOnDeserializeReadInputRegisters()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ModbusException>(() => protocol.DeserializeReadInputRegisters([0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x04, 0x04, 0x02, 0x2B, 0x00, 0x00]));
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}
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#endregion Read Input Registers
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#region Read Device Identification
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[TestMethod]
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[DataRow(ModbusDeviceIdentificationCategory.Basic)]
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[DataRow(ModbusDeviceIdentificationCategory.Regular)]
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[DataRow(ModbusDeviceIdentificationCategory.Extended)]
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[DataRow(ModbusDeviceIdentificationCategory.Individual)]
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public void ShouldSerializeReadDeviceIdentification(ModbusDeviceIdentificationCategory category)
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act
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var bytes = protocol.SerializeReadDeviceIdentification(UNIT_ID, category, ModbusDeviceIdentificationObject.ProductCode);
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// Assert
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Assert.IsNotNull(bytes);
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Assert.HasCount(13, bytes);
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// Transaction id
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Assert.AreEqual(0x00, bytes[0]);
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Assert.AreEqual(0x01, bytes[1]);
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// Protocol identifier
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Assert.AreEqual(0x00, bytes[2]);
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Assert.AreEqual(0x00, bytes[3]);
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// Following bytes
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Assert.AreEqual(0x00, bytes[4]);
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Assert.AreEqual(0x07, bytes[5]);
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// Unit id
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Assert.AreEqual(UNIT_ID, bytes[6]);
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// Function code
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Assert.AreEqual(0x2B, bytes[7]);
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// MEI Type
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Assert.AreEqual(0x0E, bytes[8]);
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// Category
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Assert.AreEqual((byte)category, bytes[9]);
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// Object Id
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Assert.AreEqual((byte)ModbusDeviceIdentificationObject.ProductCode, bytes[10]);
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// CRC check will be ignored
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}
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[TestMethod]
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public void ShouldThrowOutOfRangeExceptionForCategoryOnSerializeReadDeviceIdentification()
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{
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// Arrange
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeReadDeviceIdentification(UNIT_ID, (ModbusDeviceIdentificationCategory)10, ModbusDeviceIdentificationObject.ProductCode));
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}
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[TestMethod]
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[DataRow(false)]
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[DataRow(true)]
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public void ShouldDeserializeReadDeviceIdentification(bool moreAndIndividual)
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{
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// Arrange
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byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x0E, UNIT_ID, 0x2B, 0x0E, 0x02, (byte)(moreAndIndividual ? 0x82 : 0x02), (byte)(moreAndIndividual ? 0xFF : 0x00), (byte)(moreAndIndividual ? 0x05 : 0x00), 0x01, 0x04, 0x02, 0x41, 0x4D, 0x00, 0x00];
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var protocol = new RtuOverTcpProtocol();
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// Act
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var result = protocol.DeserializeReadDeviceIdentification(response);
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// Assert
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Assert.IsNotNull(result);
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Assert.AreEqual(moreAndIndividual, result.AllowsIndividualAccess);
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Assert.AreEqual(moreAndIndividual, result.MoreRequestsNeeded);
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Assert.AreEqual(moreAndIndividual ? 0x05 : 0x00, result.NextObjectIdToRequest);
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Assert.HasCount(1, result.Objects);
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Assert.AreEqual(4, result.Objects.First().Key);
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CollectionAssert.AreEqual("AM"u8.ToArray(), result.Objects.First().Value);
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}
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[TestMethod]
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public void ShouldThrowExceptionOnDeserializeReadDeviceIdentificationForMeiType()
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{
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// Arrange
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byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x05, UNIT_ID, 0x2B, 0x0D, 0x00, 0x00];
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ModbusException>(() => protocol.DeserializeReadDeviceIdentification(response));
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}
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[TestMethod]
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public void ShouldThrowExceptionOnDeserializeReadDeviceIdentificationForCategory()
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{
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// Arrange
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byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, UNIT_ID, 0x2B, 0x0E, 0x08, 0x00, 0x00];
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var protocol = new RtuOverTcpProtocol();
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// Act + Assert
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Assert.ThrowsExactly<ModbusException>(() => protocol.DeserializeReadDeviceIdentification(response));
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}
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#endregion Read Device Identification
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#region Write Single Coil
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[TestMethod]
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public void ShouldSerializeWriteSingleCoil()
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{
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// Arrange
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var coil = new Coil { Address = 109, Value = true };
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var protocol = new RtuOverTcpProtocol();
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// Act
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var result = protocol.SerializeWriteSingleCoil(UNIT_ID, coil);
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// Assert
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Assert.IsNotNull(result);
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Assert.HasCount(14, result);
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// Transaction id
|
|
Assert.AreEqual(0x00, result[0]);
|
|
Assert.AreEqual(0x01, result[1]);
|
|
|
|
// Protocol identifier
|
|
Assert.AreEqual(0x00, result[2]);
|
|
Assert.AreEqual(0x00, result[3]);
|
|
|
|
// Following bytes
|
|
Assert.AreEqual(0x00, result[4]);
|
|
Assert.AreEqual(0x08, result[5]);
|
|
|
|
// Unit id
|
|
Assert.AreEqual(UNIT_ID, result[6]);
|
|
|
|
// Function code
|
|
Assert.AreEqual(0x05, result[7]);
|
|
|
|
// Starting address
|
|
Assert.AreEqual(0x00, result[8]);
|
|
Assert.AreEqual(0x6D, result[9]);
|
|
|
|
// Value
|
|
Assert.AreEqual(0xFF, result[10]);
|
|
Assert.AreEqual(0x00, result[11]);
|
|
|
|
// CRC check will be ignored
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentNullOnSerializeWriteSingleCoil()
|
|
{
|
|
// Arrange
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentNullException>(() => protocol.SerializeWriteSingleCoil(UNIT_ID, null));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldDeserializeWriteSingleCoil()
|
|
{
|
|
// Arrange
|
|
byte[] bytes = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x05, 0x01, 0x0A, 0xFF, 0x00, 0x00, 0x00];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
var coil = protocol.DeserializeWriteSingleCoil(bytes);
|
|
|
|
// Assert
|
|
Assert.IsNotNull(coil);
|
|
Assert.AreEqual(266, coil.Address);
|
|
Assert.IsTrue(coil.Value);
|
|
}
|
|
|
|
#endregion Write Single Coil
|
|
|
|
#region Write Single Register
|
|
|
|
[TestMethod]
|
|
public void ShouldSerializeWriteSingleHoldingRegister()
|
|
{
|
|
// Arrange
|
|
var register = new HoldingRegister { Address = 109, Value = 123 };
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
var result = protocol.SerializeWriteSingleHoldingRegister(UNIT_ID, register);
|
|
|
|
// Assert
|
|
Assert.IsNotNull(result);
|
|
Assert.HasCount(14, result);
|
|
|
|
// Transaction id
|
|
Assert.AreEqual(0x00, result[0]);
|
|
Assert.AreEqual(0x01, result[1]);
|
|
|
|
// Protocol identifier
|
|
Assert.AreEqual(0x00, result[2]);
|
|
Assert.AreEqual(0x00, result[3]);
|
|
|
|
// Following bytes
|
|
Assert.AreEqual(0x00, result[4]);
|
|
Assert.AreEqual(0x08, result[5]);
|
|
|
|
// Unit id
|
|
Assert.AreEqual(UNIT_ID, result[6]);
|
|
|
|
// Function code
|
|
Assert.AreEqual(0x06, result[7]);
|
|
|
|
// Starting address
|
|
Assert.AreEqual(0x00, result[8]);
|
|
Assert.AreEqual(0x6D, result[9]);
|
|
|
|
// Value
|
|
Assert.AreEqual(0x00, result[10]);
|
|
Assert.AreEqual(0x7B, result[11]);
|
|
|
|
// CRC check will be ignored
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentNullOnSerializeWriteSingleHoldingRegister()
|
|
{
|
|
// Arrange
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentNullException>(() => protocol.SerializeWriteSingleHoldingRegister(UNIT_ID, null));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldDeserializeWriteSingleHoldingRegister()
|
|
{
|
|
// Arrange
|
|
byte[] bytes = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, 0x2A, 0x06, 0x02, 0x02, 0x01, 0x23, 0x00, 0x00];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
var register = protocol.DeserializeWriteSingleHoldingRegister(bytes);
|
|
|
|
// Assert
|
|
Assert.IsNotNull(register);
|
|
Assert.AreEqual(514, register.Address);
|
|
Assert.AreEqual(291, register.Value);
|
|
}
|
|
|
|
#endregion Write Single Register
|
|
|
|
#region Write Multiple Coils
|
|
|
|
[TestMethod]
|
|
public void ShouldSerializeWriteMultipleCoils()
|
|
{
|
|
// Arrange
|
|
var coils = new Coil[]
|
|
{
|
|
new() { Address = 10, Value = true },
|
|
new() { Address = 11, Value = false },
|
|
new() { Address = 12, Value = true },
|
|
new() { Address = 13, Value = false },
|
|
new() { Address = 14, Value = true },
|
|
};
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
var result = protocol.SerializeWriteMultipleCoils(UNIT_ID, coils);
|
|
|
|
// Assert
|
|
Assert.IsNotNull(result);
|
|
Assert.HasCount(16, result);
|
|
|
|
// Transaction id
|
|
Assert.AreEqual(0x00, result[0]);
|
|
Assert.AreEqual(0x01, result[1]);
|
|
|
|
// Protocol identifier
|
|
Assert.AreEqual(0x00, result[2]);
|
|
Assert.AreEqual(0x00, result[3]);
|
|
|
|
// Following bytes
|
|
Assert.AreEqual(0x00, result[4]);
|
|
Assert.AreEqual(0x0A, result[5]);
|
|
|
|
// Unit id
|
|
Assert.AreEqual(UNIT_ID, result[6]);
|
|
|
|
// Function code
|
|
Assert.AreEqual(0x0F, result[7]);
|
|
|
|
// Starting address
|
|
Assert.AreEqual(0x00, result[8]);
|
|
Assert.AreEqual(0x0A, result[9]);
|
|
|
|
// Quantity
|
|
Assert.AreEqual(0x00, result[10]);
|
|
Assert.AreEqual(0x05, result[11]);
|
|
|
|
// Byte count
|
|
Assert.AreEqual(0x01, result[12]);
|
|
|
|
// Values
|
|
Assert.AreEqual(0x15, result[13]);
|
|
|
|
// CRC check will be ignored
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentNullOnSerializeWriteMultipleCoils()
|
|
{
|
|
// Arrange
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentNullException>(() => protocol.SerializeWriteMultipleCoils(UNIT_ID, null));
|
|
}
|
|
|
|
[TestMethod]
|
|
[DataRow(0)]
|
|
[DataRow(1969)]
|
|
public void ShouldThrowOutOfRangeForCountOnSerializeWriteMultipleCoils(int count)
|
|
{
|
|
// Arrange
|
|
var coils = new List<Coil>();
|
|
for (int i = 0; i < count; i++)
|
|
coils.Add(new() { Address = (ushort)i });
|
|
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeWriteMultipleCoils(UNIT_ID, coils));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentExceptionForDuplicateEntryOnSerializeMultipleCoils()
|
|
{
|
|
// Arrange
|
|
var coils = new Coil[]
|
|
{
|
|
new() { Address = 10, Value = true },
|
|
new() { Address = 10, Value = false },
|
|
};
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentException>(() => protocol.SerializeWriteMultipleCoils(UNIT_ID, coils));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentExceptionForGapInAddressOnSerializeMultipleCoils()
|
|
{
|
|
// Arrange
|
|
var coils = new Coil[]
|
|
{
|
|
new() { Address = 10, Value = true },
|
|
new() { Address = 12, Value = false },
|
|
};
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentException>(() => protocol.SerializeWriteMultipleCoils(UNIT_ID, coils));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldDeserializeWriteMultipleCoils()
|
|
{
|
|
// Arrange
|
|
byte[] bytes = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, 0x2A, 0x0F, 0x01, 0x0A, 0x00, 0x0B, 0x00, 0x00];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
var (firstAddress, numberOfCoils) = protocol.DeserializeWriteMultipleCoils(bytes);
|
|
|
|
// Assert
|
|
Assert.AreEqual(266, firstAddress);
|
|
Assert.AreEqual(11, numberOfCoils);
|
|
}
|
|
|
|
#endregion Write Multiple Coils
|
|
|
|
#region Write Multiple Holding Registers
|
|
|
|
[TestMethod]
|
|
public void ShouldSerializeWriteMultipleHoldingRegisters()
|
|
{
|
|
// Arrange
|
|
var registers = new HoldingRegister[]
|
|
{
|
|
new() { Address = 10, Value = 10 },
|
|
new() { Address = 11, Value = 11 }
|
|
};
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
var result = protocol.SerializeWriteMultipleHoldingRegisters(UNIT_ID, registers);
|
|
|
|
// Assert
|
|
Assert.IsNotNull(result);
|
|
Assert.HasCount(19, result);
|
|
|
|
// Transaction id
|
|
Assert.AreEqual(0x00, result[0]);
|
|
Assert.AreEqual(0x01, result[1]);
|
|
|
|
// Protocol identifier
|
|
Assert.AreEqual(0x00, result[2]);
|
|
Assert.AreEqual(0x00, result[3]);
|
|
|
|
// Following bytes
|
|
Assert.AreEqual(0x00, result[4]);
|
|
Assert.AreEqual(0x0D, result[5]);
|
|
|
|
// Unit id
|
|
Assert.AreEqual(UNIT_ID, result[6]);
|
|
|
|
// Function code
|
|
Assert.AreEqual(0x10, result[7]);
|
|
|
|
// Starting address
|
|
Assert.AreEqual(0x00, result[8]);
|
|
Assert.AreEqual(0x0A, result[9]);
|
|
|
|
// Quantity
|
|
Assert.AreEqual(0x00, result[10]);
|
|
Assert.AreEqual(0x02, result[11]);
|
|
|
|
// Byte count
|
|
Assert.AreEqual(0x04, result[12]);
|
|
|
|
// Values
|
|
Assert.AreEqual(0x00, result[13]);
|
|
Assert.AreEqual(0x0A, result[14]);
|
|
Assert.AreEqual(0x00, result[15]);
|
|
Assert.AreEqual(0x0B, result[16]);
|
|
|
|
// CRC check will be ignored
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentNullOnSerializeWriteMultipleHoldingRegisters()
|
|
{
|
|
// Arrange
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentNullException>(() => protocol.SerializeWriteMultipleHoldingRegisters(UNIT_ID, null));
|
|
}
|
|
|
|
[TestMethod]
|
|
[DataRow(0)]
|
|
[DataRow(124)]
|
|
public void ShouldThrowOutOfRangeForCountOnSerializeWriteMultipleHoldingRegisters(int count)
|
|
{
|
|
// Arrange
|
|
var registers = new List<HoldingRegister>();
|
|
for (int i = 0; i < count; i++)
|
|
registers.Add(new() { Address = (ushort)i });
|
|
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentOutOfRangeException>(() => protocol.SerializeWriteMultipleHoldingRegisters(UNIT_ID, registers));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentExceptionForDuplicateEntryOnSerializeMultipleHoldingRegisters()
|
|
{
|
|
// Arrange
|
|
var registers = new HoldingRegister[]
|
|
{
|
|
new() { Address = 10 },
|
|
new() { Address = 10 },
|
|
};
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentException>(() => protocol.SerializeWriteMultipleHoldingRegisters(UNIT_ID, registers));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowArgumentExceptionForGapInAddressOnSerializeMultipleHoldingRegisters()
|
|
{
|
|
// Arrange
|
|
var registers = new HoldingRegister[]
|
|
{
|
|
new() { Address = 10 },
|
|
new() { Address = 12 },
|
|
};
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ArgumentException>(() => protocol.SerializeWriteMultipleHoldingRegisters(UNIT_ID, registers));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldDeserializeWriteMultipleHoldingRegisters()
|
|
{
|
|
// Arrange
|
|
byte[] bytes = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x10, 0x02, 0x0A, 0x00, 0x0A, 0x00, 0x00];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
var (firstAddress, numberOfCoils) = protocol.DeserializeWriteMultipleHoldingRegisters(bytes);
|
|
|
|
// Assert
|
|
Assert.AreEqual(522, firstAddress);
|
|
Assert.AreEqual(10, numberOfCoils);
|
|
}
|
|
|
|
#endregion Write Multiple Holding Registers
|
|
|
|
#region Validation
|
|
|
|
[TestMethod]
|
|
public void ShouldReturnFalseForMinLengthOnCheckResponseComplete()
|
|
{
|
|
// Arrange
|
|
byte[] bytes = [0x00, 0x01, 0x00];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
bool complete = protocol.CheckResponseComplete(bytes);
|
|
|
|
// Assert
|
|
Assert.IsFalse(complete);
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldReturnFalseForFollowingBytesOnCheckResponseComplete()
|
|
{
|
|
// Arrange
|
|
byte[] bytes = [0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x81];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
bool complete = protocol.CheckResponseComplete(bytes);
|
|
|
|
// Assert
|
|
Assert.IsFalse(complete);
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldReturnTrueOnCheckResponseComplete()
|
|
{
|
|
// Arrange
|
|
byte[] bytes = [0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x81, 0x01];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
bool complete = protocol.CheckResponseComplete(bytes);
|
|
|
|
// Assert
|
|
Assert.IsTrue(complete);
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldValidateResponse()
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, UNIT_ID, 0x01, 0x01, 0x00, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
protocol.ValidateResponse(request, response);
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldValidateResponseIgnoringTransactionId()
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x00, 0x00, 0x00, 0x00, 0x06, UNIT_ID, 0x01, 0x01, 0x00, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol { DisableTransactionId = true };
|
|
|
|
// Act
|
|
protocol.ValidateResponse(request, response);
|
|
}
|
|
|
|
[TestMethod]
|
|
[DataRow(0x00, 0x00)]
|
|
[DataRow(0x01, 0x01)]
|
|
public void ShouldThrowForTransactionIdOnValidateResponse(int hi, int lo)
|
|
{
|
|
// Arrange
|
|
byte[] request = [(byte)hi, (byte)lo, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, UNIT_ID, 0x01, 0x01, 0x00, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ModbusException>(() => protocol.ValidateResponse(request, response));
|
|
}
|
|
|
|
[TestMethod]
|
|
[DataRow(0x00, 0x01)]
|
|
[DataRow(0x01, 0x00)]
|
|
public void ShouldThrowForProtocolIdOnValidateResponse(int hi, int lo)
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, (byte)hi, (byte)lo, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, UNIT_ID, 0x01, 0x01, 0x00, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ModbusException>(() => protocol.ValidateResponse(request, response));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowForFollowingBytesOnValidateResponse()
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x07, UNIT_ID, 0x01, 0x01, 0x00, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ModbusException>(() => protocol.ValidateResponse(request, response));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowForUnitIdOnValidateResponse()
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, UNIT_ID + 1, 0x01, 0x01, 0x00, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ModbusException>(() => protocol.ValidateResponse(request, response));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowForFunctionCodeOnValidateResponse()
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, UNIT_ID, 0x02, 0x01, 0x00, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ModbusException>(() => protocol.ValidateResponse(request, response));
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldThrowForModbusErrorOnValidateResponse()
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x05, UNIT_ID, 0x81, 0x01, 0x00, 0x00];
|
|
SetCrc(response);
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ModbusException>(() => protocol.ValidateResponse(request, response));
|
|
}
|
|
|
|
[TestMethod]
|
|
[DataRow(0x59, 0x6C)]
|
|
[DataRow(0x58, 0x6B)]
|
|
public void ShouldThrowForCrcOnValidateResponse(int hi, int lo)
|
|
{
|
|
// Arrange
|
|
byte[] request = [0x00, 0x01, 0x00, 0x00, 0x00, 0x08, UNIT_ID, 0x01, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00];
|
|
byte[] response = [0x00, 0x01, 0x00, 0x00, 0x00, 0x06, UNIT_ID, 0x01, 0x01, 0x00, (byte)hi, (byte)lo];
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act + Assert
|
|
Assert.ThrowsExactly<ModbusException>(() => protocol.ValidateResponse(request, response));
|
|
}
|
|
|
|
#endregion Validation
|
|
|
|
#region Helper
|
|
|
|
[TestMethod]
|
|
public void ShouldIncreaseTransactionId()
|
|
{
|
|
// Arrange
|
|
var list = new List<byte[]>();
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
list.Add([.. protocol.SerializeReadCoils(UNIT_ID, 10, 10)]);
|
|
list.Add([.. protocol.SerializeReadCoils(UNIT_ID, 10, 10)]);
|
|
list.Add([.. protocol.SerializeReadCoils(UNIT_ID, 10, 10)]);
|
|
|
|
// Assert
|
|
for (int i = 0; i < list.Count; i++)
|
|
{
|
|
Assert.AreEqual(0x00, list[i][0]);
|
|
Assert.AreEqual((byte)(i + 1), list[i][1]);
|
|
|
|
// Other asserts already done
|
|
}
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldNotIncreaseTransactionId()
|
|
{
|
|
// Arrange
|
|
var list = new List<byte[]>();
|
|
var protocol = new RtuOverTcpProtocol { DisableTransactionId = true };
|
|
|
|
// Act
|
|
list.Add([.. protocol.SerializeReadCoils(UNIT_ID, 10, 10)]);
|
|
list.Add([.. protocol.SerializeReadCoils(UNIT_ID, 10, 10)]);
|
|
list.Add([.. protocol.SerializeReadCoils(UNIT_ID, 10, 10)]);
|
|
|
|
// Assert
|
|
for (int i = 0; i < list.Count; i++)
|
|
{
|
|
Assert.AreEqual(0x00, list[i][0]);
|
|
Assert.AreEqual(0x00, list[i][1]);
|
|
|
|
// Other asserts already done
|
|
}
|
|
}
|
|
|
|
[TestMethod]
|
|
public void ShouldResetTransactionIdOnMaxValue()
|
|
{
|
|
// Arrange
|
|
var protocol = new RtuOverTcpProtocol();
|
|
protocol.GetType()
|
|
.GetField("_transactionId", BindingFlags.NonPublic | BindingFlags.Instance)
|
|
.SetValue(protocol, (ushort)(ushort.MaxValue - 1));
|
|
|
|
// Act
|
|
var result1 = protocol.SerializeReadCoils(UNIT_ID, 10, 10);
|
|
var result2 = protocol.SerializeReadCoils(UNIT_ID, 10, 10);
|
|
|
|
// Assert
|
|
Assert.AreEqual(0xFF, result1[0]);
|
|
Assert.AreEqual(0xFF, result1[1]);
|
|
|
|
Assert.AreEqual(0x00, result2[0]);
|
|
Assert.AreEqual(0x00, result2[1]);
|
|
}
|
|
|
|
#endregion Helper
|
|
|
|
[TestMethod]
|
|
public void ShouldNameRtuOverTcp()
|
|
{
|
|
// Arrange
|
|
var protocol = new RtuOverTcpProtocol();
|
|
|
|
// Act
|
|
string result = protocol.Name;
|
|
|
|
// Assert
|
|
Assert.AreEqual("RTU over TCP", result);
|
|
}
|
|
|
|
private static void SetCrc(byte[] bytes)
|
|
{
|
|
byte[] crc = RtuProtocol.CRC16(bytes, 6, bytes.Length - 8);
|
|
bytes[^2] = crc[0];
|
|
bytes[^1] = crc[1];
|
|
}
|
|
}
|
|
}
|