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S7NetTestsSync.cs
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#region Using
using System;
using System.Collections.Generic;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using S7.Net.UnitTest.Helpers;
using S7.Net.Types;
using S7.UnitTest.Helpers;
using System.Security.Cryptography;
#if NET5_0_OR_GREATER
using System.Buffers;
#endif
#endregion
/**
* About the tests:
* ---------------------------------------------------------------------------
* The tests were written to show how to use this library to read and write
* different types of values, how to box and unbox values and of course to
* address some of the bugs of the library.
* These tests are not meant to cover 100% the code, but to check that once a
* variable is written, it stores the correct value.
* ----------------------------------------------------------------------------
* The plc used for the tests is the S7 "server" provided by Snap7 opensource
* library, that you can get for free here:http://snap7.sourceforge.net/
* The implementation of the server will not be discussed here, but there are
* some issues with the interop that cause the server, and unit test, to fail
* under some circumstances, like "click on Run all tests" too much.
* This doesn't mean that S7.Net has bugs, but that the implementation of the
* server has problems.
*
*/
//This file contains tests for the synchronous methods
#pragma warning disable CS0618
namespace S7.Net.UnitTest
{
[TestClass]
public partial class S7NetTests : IDisposable
{
#region Constants
const int DB2 = 2;
const int DB4 = 4;
const short TestServerPort = 31122;
const string TestServerIp = "127.0.0.1";
#endregion
#region Private fields
Plc plc;
#endregion
#region Constructor
/// <summary>
/// Create a plc that will connect to localhost (Snap 7 server) and connect to it
/// </summary>
public S7NetTests()
{
plc = CreatePlc();
}
private static Plc CreatePlc()
{
return new Plc(CpuType.S7300, TestServerIp, TestServerPort, 0, 2);
}
[TestInitialize]
public void Setup()
{
S7TestServer.Start(TestServerPort);
plc.Open();
}
[TestCleanup]
public void TearDown()
{
plc.Close();
S7TestServer.Stop();
}
#endregion
#region Tests
[TestMethod]
public void T00_TestConnection()
{
if (plc.IsConnected == false)
{
try
{
plc.Open();
}
catch (Exception e)
{
throw new Exception("If you have s7 installed you must close s7oiehsx64 service.", e);
}
}
}
/// <summary>
/// Read/Write a single Int16 or UInt16 with a single request.
/// Test that writing a UInt16 (ushort) and reading it gives the correct value.
/// Test also that writing a Int16 (short) and reading it gives the correct value.
/// </summary>
[TestMethod]
public void T01_WriteAndReadInt16Variable()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
// To write a ushort i don't need any cast, only unboxing must be done
ushort val = 40000;
plc.Write("DB1.DBW0", val);
ushort result = (ushort)plc.Read("DB1.DBW0");
Assert.AreEqual(val, result, "A ushort goes from 0 to 64512");
// To write a short i need to convert it to UShort, then i need to reconvert the readed value to get
// the negative sign back
// Depending if i'm writing on a DWORD or on a DEC, i will see ushort or short value in the plc
short value = -100;
Assert.IsTrue(plc.IsConnected, "After connecting, IsConnected must be set to true");
plc.Write("DB1.DBW0", value.ConvertToUshort());
short result2 = ((ushort)plc.Read("DB1.DBW0")).ConvertToShort();
Assert.AreEqual(value, result2, "A short goes from -32767 to 32766");
}
/// <summary>
/// Read/Write a single Int32 or UInt32 with a single request.
/// Test that writing a UInt32 (uint) and reading it gives the correct value.
/// Test also that writing a Int32 (int) and reading it gives the correct value.
/// </summary>
[TestMethod]
public void T02_WriteAndReadInt32Variable()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
// To write a uint I don't need any cast, only unboxing must be done
uint val = 1000;
plc.Write("DB1.DBD40", val);
uint result = (uint)plc.Read("DB1.DBD40");
Assert.AreEqual(val, result);
// To write a int I need to convert it to uint, then I need to reconvert the readed value to get
// the negative sign back
// Depending if I'm writing on a DBD or on a LONG, I will see uint or int value in the plc
int value = -60000;
plc.Write("DB1.DBD60", value);
int result2 = ((uint)plc.Read("DB1.DBD60")).ConvertToInt();
Assert.AreEqual(value, result2);
}
/// <summary>
/// Read/Write a single REAL with a single request.
/// Test that writing a float and reading it gives the correct value.
/// </summary>
[TestMethod]
public void T03_WriteAndReadRealVariables()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
// Reading and writing a float is quite complicated, because it needs to be converted to DWord before the write,
// then reconvert to float after the read. Float values can contain only 7 digits, so no precision is lost.
float val2 = 1234567;
plc.Write("DB1.DBD40", val2.ConvertToUInt());
float result2 = ((uint)plc.Read("DB1.DBD40")).ConvertToFloat();
Assert.AreEqual(val2, result2);
float val3 = 12.34567f;
plc.Write("DB1.DBD40", val3.ConvertToUInt());
float result3 = ((uint)plc.Read("DB1.DBD40")).ConvertToFloat();
Assert.AreEqual(val3, result3);
}
/// <summary>
/// Read/Write a class that has the same properties of a DB with the same field in the same order
/// </summary>
[TestMethod]
public void T04_ReadAndWriteClass()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClass tc = new TestClass();
tc.BitVariable00 = true;
tc.BitVariable10 = true;
tc.DIntVariable = -100000;
tc.IntVariable = -15000;
tc.LRealVariable = -154.789;
tc.RealVariable = -154.789f;
tc.DWordVariable = 850;
tc.WStringVariable = "ÄÜÉÊéà";
tc.StringVariable = "Hallo";
plc.WriteClass(tc, DB2);
TestClass tc2 = new TestClass();
// Values that are read from a class are stored inside the class itself, that is passed by reference
plc.ReadClass(tc2, DB2);
Assert.AreEqual(tc.BitVariable00, tc2.BitVariable00);
Assert.AreEqual(tc.BitVariable10, tc2.BitVariable10);
Assert.AreEqual(tc.DIntVariable, tc2.DIntVariable);
Assert.AreEqual(tc.IntVariable, tc2.IntVariable);
Assert.AreEqual(tc.LRealVariable, tc2.LRealVariable);
Assert.AreEqual(tc.RealVariable, tc2.RealVariable);
Assert.AreEqual(tc.DWordVariable, tc2.DWordVariable);
Assert.AreEqual(tc.WStringVariable, tc2.WStringVariable);
Assert.AreEqual(tc.StringVariable, tc2.StringVariable);
}
/// <summary>
/// Read/Write a struct that has the same properties of a DB with the same field in the same order
/// </summary>
[TestMethod]
public void T05_ReadAndWriteStruct()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestStruct tc = new TestStruct();
tc.BitVariable00 = true;
tc.BitVariable10 = true;
tc.DIntVariable = -100000;
tc.IntVariable = -15000;
tc.LRealVariable = -154.789;
tc.RealVariable = -154.789f;
tc.DWordVariable = 850;
tc.WStringVariable = "ÄÜÉÊéà";
tc.StringVariable = "Hallo";
plc.WriteStruct(tc, DB2);
// Values that are read from a struct are stored in a new struct, returned by the funcion ReadStruct
TestStruct tc2 = (TestStruct)plc.ReadStruct(typeof(TestStruct), DB2);
Assert.AreEqual(tc.BitVariable00, tc2.BitVariable00);
Assert.AreEqual(tc.BitVariable10, tc2.BitVariable10);
Assert.AreEqual(tc.DIntVariable, tc2.DIntVariable);
Assert.AreEqual(tc.IntVariable, tc2.IntVariable);
Assert.AreEqual(tc.LRealVariable, tc2.LRealVariable);
Assert.AreEqual(tc.RealVariable, tc2.RealVariable);
Assert.AreEqual(tc.DWordVariable, tc2.DWordVariable);
Assert.AreEqual(tc.WStringVariable, tc2.WStringVariable);
Assert.AreEqual(tc.StringVariable, tc2.StringVariable);
}
/// <summary>
/// Read/Write a struct that has the same properties of a DB with the same field in the same order
/// </summary>
[TestMethod]
public void T06_ReadAndWriteLongStruct()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestLongStruct tc = new TestLongStruct();
tc.IntVariable0 = 0;
tc.IntVariable1 = 1;
tc.IntVariable10 = 10;
tc.IntVariable11 = 11;
tc.IntVariable20 = 20;
tc.IntVariable21 = 21;
tc.IntVariable30 = 30;
tc.IntVariable31 = 31;
tc.IntVariable40 = 40;
tc.IntVariable41 = 41;
tc.IntVariable50 = 50;
tc.IntVariable51 = 51;
tc.IntVariable60 = 60;
tc.IntVariable61 = 61;
tc.IntVariable70 = 70;
tc.IntVariable71 = 71;
tc.IntVariable80 = 80;
tc.IntVariable81 = 81;
tc.IntVariable90 = 90;
tc.IntVariable91 = 91;
tc.IntVariable100 = 100;
tc.IntVariable101 = 101;
tc.IntVariable110 = 200;
tc.IntVariable111 = 201;
plc.WriteStruct(tc, DB2);
// Values that are read from a struct are stored in a new struct, returned by the funcion ReadStruct
TestLongStruct tc2 = (TestLongStruct)plc.ReadStruct(typeof(TestLongStruct), DB2);
Assert.AreEqual(tc.IntVariable0, tc2.IntVariable0);
Assert.AreEqual(tc.IntVariable1, tc2.IntVariable1);
Assert.AreEqual(tc.IntVariable10, tc2.IntVariable10);
Assert.AreEqual(tc.IntVariable11, tc2.IntVariable11);
Assert.AreEqual(tc.IntVariable20, tc2.IntVariable20);
Assert.AreEqual(tc.IntVariable21, tc2.IntVariable21);
Assert.AreEqual(tc.IntVariable30, tc2.IntVariable30);
Assert.AreEqual(tc.IntVariable31, tc2.IntVariable31);
Assert.AreEqual(tc.IntVariable40, tc2.IntVariable40);
Assert.AreEqual(tc.IntVariable41, tc2.IntVariable41);
Assert.AreEqual(tc.IntVariable50, tc2.IntVariable50);
Assert.AreEqual(tc.IntVariable51, tc2.IntVariable51);
Assert.AreEqual(tc.IntVariable60, tc2.IntVariable60);
Assert.AreEqual(tc.IntVariable61, tc2.IntVariable61);
Assert.AreEqual(tc.IntVariable70, tc2.IntVariable70);
Assert.AreEqual(tc.IntVariable71, tc2.IntVariable71);
Assert.AreEqual(tc.IntVariable80, tc2.IntVariable80);
Assert.AreEqual(tc.IntVariable81, tc2.IntVariable81);
Assert.AreEqual(tc.IntVariable90, tc2.IntVariable90);
Assert.AreEqual(tc.IntVariable91, tc2.IntVariable91);
Assert.AreEqual(tc.IntVariable100, tc2.IntVariable100);
Assert.AreEqual(tc.IntVariable101, tc2.IntVariable101);
Assert.AreEqual(tc.IntVariable110, tc2.IntVariable110);
Assert.AreEqual(tc.IntVariable111, tc2.IntVariable111);
}
/// <summary>
/// Read/Write a class that has the same properties of a DB with the same field in the same order
/// </summary>
[TestMethod]
public void T07_ReadAndWriteLongClass()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestLongClass tc = new TestLongClass();
tc.IntVariable0 = 0;
tc.IntVariable1 = 1;
tc.IntVariable10 = 10;
tc.IntVariable11 = 11;
tc.IntVariable20 = 20;
tc.IntVariable21 = 21;
tc.IntVariable30 = 30;
tc.IntVariable31 = 31;
tc.IntVariable40 = 40;
tc.IntVariable41 = 41;
tc.IntVariable50 = 50;
tc.IntVariable51 = 51;
tc.IntVariable60 = 60;
tc.IntVariable61 = 61;
tc.IntVariable70 = 70;
tc.IntVariable71 = 71;
tc.IntVariable80 = 80;
tc.IntVariable81 = 81;
tc.IntVariable90 = 90;
tc.IntVariable91 = 91;
tc.IntVariable100 = 100;
tc.IntVariable101 = 101;
tc.IntVariable110 = 200;
tc.IntVariable111 = 201;
plc.WriteClass(tc, DB2);
// Values that are read from a struct are stored in a new struct, returned by the funcion ReadStruct
TestLongClass tc2 = new TestLongClass();
plc.ReadClass(tc2, DB2);
Assert.AreEqual(tc.IntVariable0, tc2.IntVariable0);
Assert.AreEqual(tc.IntVariable1, tc2.IntVariable1);
Assert.AreEqual(tc.IntVariable10, tc2.IntVariable10);
Assert.AreEqual(tc.IntVariable11, tc2.IntVariable11);
Assert.AreEqual(tc.IntVariable20, tc2.IntVariable20);
Assert.AreEqual(tc.IntVariable21, tc2.IntVariable21);
Assert.AreEqual(tc.IntVariable30, tc2.IntVariable30);
Assert.AreEqual(tc.IntVariable31, tc2.IntVariable31);
Assert.AreEqual(tc.IntVariable40, tc2.IntVariable40);
Assert.AreEqual(tc.IntVariable41, tc2.IntVariable41);
Assert.AreEqual(tc.IntVariable50, tc2.IntVariable50);
Assert.AreEqual(tc.IntVariable51, tc2.IntVariable51);
Assert.AreEqual(tc.IntVariable60, tc2.IntVariable60);
Assert.AreEqual(tc.IntVariable61, tc2.IntVariable61);
Assert.AreEqual(tc.IntVariable70, tc2.IntVariable70);
Assert.AreEqual(tc.IntVariable71, tc2.IntVariable71);
Assert.AreEqual(tc.IntVariable80, tc2.IntVariable80);
Assert.AreEqual(tc.IntVariable81, tc2.IntVariable81);
Assert.AreEqual(tc.IntVariable90, tc2.IntVariable90);
Assert.AreEqual(tc.IntVariable91, tc2.IntVariable91);
Assert.AreEqual(tc.IntVariable100, tc2.IntVariable100);
Assert.AreEqual(tc.IntVariable101, tc2.IntVariable101);
Assert.AreEqual(tc.IntVariable110, tc2.IntVariable110);
Assert.AreEqual(tc.IntVariable111, tc2.IntVariable111);
}
/// <summary>
/// Tests that a read and a write on addresses bigger than 8192 are executed correctly
/// </summary>
[TestMethod]
public void T08_WriteAndReadInt16VariableAddress8192()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
// To write a ushort i don't need any cast, only unboxing must be done
ushort val = 8192;
plc.Write("DB2.DBW8192", val);
ushort result = (ushort)plc.Read("DB2.DBW8192");
Assert.AreEqual(val, result, "A ushort goes from 0 to 64512");
// To write a short i need to convert it to UShort, then i need to reconvert the readed value to get
// the negative sign back
// Depending if i'm writing on a DWORD or on a DEC, i will see ushort or short value in the plc
short value = -8192;
Assert.IsTrue(plc.IsConnected, "After connecting, IsConnected must be set to true");
plc.Write("DB2.DBW8192", value.ConvertToUshort());
short result2 = ((ushort)plc.Read("DB2.DBW8192")).ConvertToShort();
Assert.AreEqual(value, result2, "A short goes from -32767 to 32766");
}
/// <summary>
/// Tests that a read and a write on addresses bigger than 8192 are executed correctly
/// </summary>
[TestMethod]
public void T09_WriteAndReadInt16VariableAddress16384()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
// To write a ushort i don't need any cast, only unboxing must be done
ushort val = 16384;
plc.Write("DB2.DBW16384", val);
ushort result = (ushort)plc.Read("DB2.DBW16384");
Assert.AreEqual(val, result, "A ushort goes from 0 to 64512");
// To write a short i need to convert it to UShort, then i need to reconvert the readed value to get
// the negative sign back
// Depending if i'm writing on a DWORD or on a DEC, i will see ushort or short value in the plc
short value = -16384;
Assert.IsTrue(plc.IsConnected, "After connecting, IsConnected must be set to true");
plc.Write("DB2.DBW16384", value.ConvertToUshort());
short result2 = ((ushort)plc.Read("DB2.DBW16384")).ConvertToShort();
Assert.AreEqual(value, result2, "A short goes from -32767 to 32766");
}
[TestMethod]
public void T10_ReadMultipleBytes()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
bool val = true;
plc.Write("DB2.DBX0.5", val);
bool result = (bool)plc.Read("DB2.DBX0.5");
Assert.AreEqual(val, result);
ushort val1 = 16384;
plc.Write("DB2.DBW16384", val1);
ushort result1 = (ushort)plc.Read("DB2.DBW16384");
Assert.AreEqual(val1, result1, "A ushort goes from 0 to 64512");
bool val2 = true;
plc.Write("DB2.DBX8192.7", val2);
bool result2 = (bool)plc.Read("DB2.DBX8192.7");
Assert.AreEqual(val2, result2);
ushort val3 = 129;
plc.Write("DB2.DBW16", val3);
ushort result3 = (ushort)plc.Read("DB2.DBW16");
Assert.AreEqual(val3, result3, "A ushort goes from 0 to 64512");
byte[] val4 = new byte[] { 0x12, 0x34 };
plc.Write("DB2.DBB2048", val4[0]);
plc.Write("DB2.DBB2049", val4[1]);
byte result4b0 = (byte)plc.Read("DB2.DBB2048");
byte result4b1 = (byte)plc.Read("DB2.DBB2049");
Assert.AreEqual(val4[0], result4b0);
Assert.AreEqual(val4[1], result4b1);
bool val6 = true;
plc.Write("DB2.DBX16384.6", val6);
bool result6 = (bool)plc.Read("DB2.DBX16384.6");
Assert.AreEqual(val6, result6);
var dataItems = new List<DataItem>()
{
new DataItem
{
Count = 1,
DataType = DataType.DataBlock,
DB = 2,
StartByteAdr = 0,
BitAdr = 5,
VarType = VarType.Bit
}
,new DataItem
{
Count = 1,
DataType = DataType.DataBlock,
DB = 2,
StartByteAdr = 16384,
VarType = VarType.Word
},
new DataItem
{
Count = 1,
DataType = DataType.DataBlock,
DB = 2,
StartByteAdr = 8192,
BitAdr = 7,
VarType = VarType.Bit
},
new DataItem
{
Count = 1,
DataType = DataType.DataBlock,
DB = 2,
StartByteAdr = 16,
VarType = VarType.Word
},
// single byte
new DataItem
{
Count = 1,
DataType = DataType.DataBlock,
DB = 2,
StartByteAdr = 2048,
VarType = VarType.Byte
},
// multiple bytes
new DataItem
{
Count = 2,
DataType = DataType.DataBlock,
DB = 2,
StartByteAdr = 2048,
VarType = VarType.Byte
},
new DataItem
{
Count = 1,
DataType = DataType.DataBlock,
DB = 2,
StartByteAdr = 16384,
BitAdr = 6,
VarType = VarType.Bit
},
};
plc.ReadMultipleVars(dataItems);
Assert.AreEqual(dataItems[0].Value, val);
Assert.AreEqual(dataItems[1].Value, val1);
Assert.AreEqual(dataItems[2].Value, val2);
Assert.AreEqual(dataItems[3].Value, val3);
Assert.AreEqual(dataItems[4].Value, val4[0]);
Assert.AreEqual(((byte[])dataItems[5].Value)[0], val4[0]); //dataItem[5].Value should be byte[2]
Assert.AreEqual(((byte[])dataItems[5].Value)[1], val4[1]);
Assert.AreEqual(dataItems[6].Value, val6);
}
/// <summary>
/// Tests that a read and a write on addresses bigger than 8192 are executed correctly
/// </summary>
[TestMethod]
public void T11_WriteAndReadBooleanVariable()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
// tests when writing true/false
plc.Write("DB1.DBX0.0", false);
var boolVariable = (bool)plc.Read("DB1.DBX0.0");
Assert.IsFalse(boolVariable);
plc.Write("DB1.DBX0.0", true);
boolVariable = (bool)plc.Read("DB1.DBX0.0");
Assert.IsTrue(boolVariable);
// tests when writing 0/1
plc.Write("DB1.DBX0.0", 0);
boolVariable = (bool)plc.Read("DB1.DBX0.0");
Assert.IsFalse(boolVariable);
plc.Write("DB1.DBX0.0", 1);
boolVariable = (bool)plc.Read("DB1.DBX0.0");
Assert.IsTrue(boolVariable);
plc.Write("DB1.DBX0.7", 1);
boolVariable = (bool)plc.Read("DB1.DBX0.7");
Assert.IsTrue(boolVariable);
plc.Write("DB1.DBX0.7", 0);
boolVariable = (bool)plc.Read("DB1.DBX0.7");
Assert.IsFalse(boolVariable);
plc.Write("DB1.DBX658.0", 1);
boolVariable = (bool)plc.Read("DB1.DBX658.0");
Assert.IsTrue(boolVariable);
plc.Write("DB1.DBX658.7", 1);
boolVariable = (bool)plc.Read("DB1.DBX658.7");
Assert.IsTrue(boolVariable);
plc.Write("DB2.DBX9658.0", 1);
boolVariable = (bool)plc.Read("DB2.DBX9658.0");
Assert.IsTrue(boolVariable);
}
[TestMethod]
public void T12_ReadClassIgnoresNonPublicSetters()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClassWithPrivateSetters tc = new TestClassWithPrivateSetters();
tc.BitVariable00 = true;
tc.BitVariable10 = true;
tc.DIntVariable = -100000;
tc.IntVariable = -15000;
tc.LRealVariable = -154.789;
tc.RealVariable = -154.789f;
tc.DWordVariable = 850;
tc.WStringVariable = "ÄÜÉÊéà";
tc.StringVariable = "Hallo";
plc.WriteClass(tc, DB2);
TestClassWithPrivateSetters tc2 = new TestClassWithPrivateSetters();
// Values that are read from a class are stored inside the class itself, that is passed by reference
plc.ReadClass(tc2, DB2);
Assert.AreEqual(tc.BitVariable00, tc2.BitVariable00);
Assert.AreEqual(tc.BitVariable10, tc2.BitVariable10);
Assert.AreEqual(tc.DIntVariable, tc2.DIntVariable);
Assert.AreEqual(tc.IntVariable, tc2.IntVariable);
Assert.AreEqual(tc.LRealVariable, tc2.LRealVariable);
Assert.AreEqual(tc.RealVariable, tc2.RealVariable);
Assert.AreEqual(tc.DWordVariable, tc2.DWordVariable);
Assert.AreEqual(TestClassWithPrivateSetters.PRIVATE_SETTER_VALUE, tc2.PrivateSetterProperty);
Assert.AreEqual(TestClassWithPrivateSetters.PROTECTED_SETTER_VALUE, tc2.ProtectedSetterProperty);
Assert.AreEqual(TestClassWithPrivateSetters.INTERNAL_SETTER_VALUE, tc2.InternalSetterProperty);
Assert.AreEqual(TestClassWithPrivateSetters.JUST_A_GETTER_VALUE, tc2.JustAGetterProperty);
}
[TestMethod, ExpectedException(typeof(PlcException))]
public void T13_ReadBytesThrowsIfPlcIsNotConnected()
{
using (var notConnectedPlc = new Plc(CpuType.S7300, "255.255.255.255", 0, 0))
{
Assert.IsFalse(notConnectedPlc.IsConnected);
TestClass tc = new TestClass();
int actualReadBytes = notConnectedPlc.ReadClass(tc, DB2);
}
}
[TestMethod]
public void T14_ReadClassWithGenericReturnsSameResultAsReadClassWithoutGeneric()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClass tc = new TestClass();
tc.BitVariable00 = true;
tc.BitVariable10 = true;
tc.DIntVariable = -100000;
tc.IntVariable = -15000;
tc.LRealVariable = -154.789;
tc.RealVariable = -154.789f;
tc.DWordVariable = 850;
tc.WStringVariable = "ÄÜÉÊéà";
tc.StringVariable = "Hallo";
plc.WriteClass(tc, DB2);
// Values that are read from a class are stored inside the class itself, that is passed by reference
TestClass tc2 = new TestClass();
plc.ReadClass(tc2, DB2);
TestClass tc2Generic = plc.ReadClass<TestClass>(DB2);
Assert.AreEqual(tc2.BitVariable00, tc2Generic.BitVariable00);
Assert.AreEqual(tc2.BitVariable10, tc2Generic.BitVariable10);
Assert.AreEqual(tc2.DIntVariable, tc2Generic.DIntVariable);
Assert.AreEqual(tc2.IntVariable, tc2Generic.IntVariable);
Assert.AreEqual(Math.Round(tc2.LRealVariable, 3), Math.Round(tc2Generic.LRealVariable, 3));
Assert.AreEqual(tc2.RealVariable, tc2Generic.RealVariable);
Assert.AreEqual(tc2.DWordVariable, tc2Generic.DWordVariable);
Assert.AreEqual(tc2.WStringVariable, tc2Generic.WStringVariable);
Assert.AreEqual(tc2.StringVariable, tc2Generic.StringVariable);
}
[TestMethod, ExpectedException(typeof(PlcException))]
public void T15_ReadClassWithGenericThrowsIfPlcIsNotConnected()
{
using (var notConnectedPlc = new Plc(CpuType.S7300, "255.255.255.255", 0, 0))
{
Assert.IsFalse(notConnectedPlc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClass tc = notConnectedPlc.ReadClass<TestClass>(DB2);
Assert.IsNull(tc);
}
}
[TestMethod]
public void T16_ReadClassWithGenericAndClassFactoryReturnsSameResultAsReadClassWithoutGeneric()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClass tc = new TestClass();
tc.BitVariable00 = true;
tc.BitVariable10 = true;
tc.DIntVariable = -100000;
tc.IntVariable = -15000;
tc.LRealVariable = -154.789;
tc.RealVariable = -154.789f;
tc.DWordVariable = 850;
tc.WStringVariable = "ÄÜÉÊéà";
tc.StringVariable = "Hallo";
plc.WriteClass(tc, DB2);
// Values that are read from a class are stored inside the class itself, that is passed by reference
TestClass tc2Generic = plc.ReadClass<TestClass>(DB2);
TestClass tc2GenericWithClassFactory = plc.ReadClass(() => new TestClass(), DB2);
Assert.AreEqual(tc2Generic.BitVariable00, tc2GenericWithClassFactory.BitVariable00);
Assert.AreEqual(tc2Generic.BitVariable10, tc2GenericWithClassFactory.BitVariable10);
Assert.AreEqual(tc2Generic.DIntVariable, tc2GenericWithClassFactory.DIntVariable);
Assert.AreEqual(tc2Generic.IntVariable, tc2GenericWithClassFactory.IntVariable);
Assert.AreEqual(Math.Round(tc2Generic.LRealVariable, 3), Math.Round(tc2GenericWithClassFactory.LRealVariable, 3));
Assert.AreEqual(tc2Generic.RealVariable, tc2GenericWithClassFactory.RealVariable);
Assert.AreEqual(tc2Generic.DWordVariable, tc2GenericWithClassFactory.DWordVariable);
Assert.AreEqual(tc2Generic.WStringVariable, tc2GenericWithClassFactory.WStringVariable);
Assert.AreEqual(tc2Generic.StringVariable, tc2GenericWithClassFactory.StringVariable);
}
[TestMethod, ExpectedException(typeof(PlcException))]
public void T17_ReadClassWithGenericAndClassFactoryThrowsIfPlcIsNotConnected()
{
using (var notConnectedPlc = new Plc(CpuType.S7300, "255.255.255.255", 0, 0))
{
Assert.IsFalse(notConnectedPlc.IsConnected);
TestClass tc = notConnectedPlc.ReadClass(() => new TestClass(), DB2);
Assert.IsNull(tc);
}
}
[TestMethod]
public void T31_ReadClassWithNestedClassAfterBit()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
Assert.AreEqual(6, Types.Class.GetClassSize(new TestClassWithNestedClass()));
TestClassWithNestedClass tc = new TestClassWithNestedClass();
tc.BitVariable00 = true;
tc.BitVariable01.BitVariable00 = true;
tc.ByteVariable02.ByteVariable00 = 128;
tc.BitVariable03 = true;
tc.ShortVariable04.ShortVarialbe00 = -15000;
TestClassWithNestedClass tc2 = new TestClassWithNestedClass();
plc.ReadClass(tc2, DB4);
Assert.AreEqual(tc.BitVariable00, tc2.BitVariable00);
Assert.AreEqual(tc.BitVariable01.BitVariable00, tc2.BitVariable01.BitVariable00);
Assert.AreEqual(tc.ByteVariable02.ByteVariable00, tc2.ByteVariable02.ByteVariable00);
Assert.AreEqual(tc.BitVariable03, tc2.BitVariable03);
Assert.AreEqual(tc.ShortVariable04.ShortVarialbe00, tc2.ShortVariable04.ShortVarialbe00);
}
[TestMethod]
public void T32_ReadAndWriteNestedClass()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClassWithNestedClass tc = new TestClassWithNestedClass
{
BitVariable00 = true,
BitVariable01 = new TestClassInnerWithBool { BitVariable00 = true },
ByteVariable02 = new TestClassInnerWithByte { ByteVariable00 = 128 },
BitVariable03 = true,
ShortVariable04 = new TestClassInnerWithShort { ShortVarialbe00 = -15000 }
};
plc.WriteClass(tc, DB4);
TestClassWithNestedClass tc2 = new TestClassWithNestedClass();
// Values that are read from a class are stored inside the class itself, that is passed by reference
plc.ReadClass(tc2, DB4);
Assert.AreEqual(tc.BitVariable00, tc2.BitVariable00);
Assert.AreEqual(tc.BitVariable01.BitVariable00, tc2.BitVariable01.BitVariable00);
Assert.AreEqual(tc.ByteVariable02.ByteVariable00, tc2.ByteVariable02.ByteVariable00);
Assert.AreEqual(tc.BitVariable03, tc2.BitVariable03);
Assert.AreEqual(tc.ShortVariable04.ShortVarialbe00, tc2.ShortVariable04.ShortVarialbe00);
}
/// <summary>
/// Write/Read a large amount of data to test PDU max
/// </summary>
[TestMethod]
public void T33_WriteLargeByteArray()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
var randomEngine = new Random();
var data = new byte[8192];
var db = 2;
randomEngine.NextBytes(data);
plc.WriteBytes(DataType.DataBlock, db, 0, data);
var readData = plc.ReadBytes(DataType.DataBlock, db, 0, data.Length);
CollectionAssert.AreEqual(data, readData);
}
#if NET5_0_OR_GREATER
/// <summary>
/// Write/Read a large amount of data to test PDU max
/// </summary>
[TestMethod]
public void T33_WriteLargeByteArrayWithSpan()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
var randomEngine = new Random();
using var dataOwner = MemoryPool<byte>.Shared.Rent(8192);
var data = dataOwner.Memory.Span.Slice(0, 8192);
var db = 2;
randomEngine.NextBytes(data);
plc.WriteBytes(DataType.DataBlock, db, 0, data);
using var readDataOwner = MemoryPool<byte>.Shared.Rent(data.Length);
var readData = readDataOwner.Memory.Span.Slice(0, data.Length);
plc.ReadBytes(readData, DataType.DataBlock, db, 0);
CollectionAssert.AreEqual(data.ToArray(), readData.ToArray());
}
#endif
[TestMethod, ExpectedException(typeof(PlcException))]
public void T18_ReadStructThrowsIfPlcIsNotConnected()
{
using (var notConnectedPlc = new Plc(CpuType.S7300, "255.255.255.255", 0, 0))
{
Assert.IsFalse(notConnectedPlc.IsConnected);
object tsObj = notConnectedPlc.ReadStruct(typeof(TestStruct), DB2);
Assert.IsNull(tsObj);
}
}
[TestMethod]
public void T19_ReadStructWithGenericReturnsSameResultAsReadStructWithoutGeneric()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestStruct ts = new TestStruct();
ts.BitVariable00 = true;
ts.BitVariable10 = true;
ts.DIntVariable = -100000;
ts.IntVariable = -15000;
ts.LRealVariable = -154.789;
ts.RealVariable = -154.789f;
ts.DWordVariable = 850;
ts.WStringVariable = "ÄÜÉÊéà";
ts.StringVariable = "Hallo";
plc.WriteStruct(ts, DB2);
// Values that are read from a struct are stored in a new struct, returned by the funcion ReadStruct
TestStruct ts2 = (TestStruct)plc.ReadStruct(typeof(TestStruct), DB2);
TestStruct ts2Generic = plc.ReadStruct<TestStruct>(DB2).Value;
Assert.AreEqual(ts2.BitVariable00, ts2Generic.BitVariable00);
Assert.AreEqual(ts2.BitVariable10, ts2Generic.BitVariable10);
Assert.AreEqual(ts2.DIntVariable, ts2Generic.DIntVariable);
Assert.AreEqual(ts2.IntVariable, ts2Generic.IntVariable);
Assert.AreEqual(ts2.LRealVariable, ts2Generic.LRealVariable);
Assert.AreEqual(ts2.RealVariable, ts2Generic.RealVariable);
Assert.AreEqual(ts2.DWordVariable, ts2Generic.DWordVariable);
Assert.AreEqual(ts2.WStringVariable, ts2Generic.WStringVariable);
Assert.AreEqual(ts2.StringVariable, ts2Generic.StringVariable);
}
[TestMethod, ExpectedException(typeof(PlcException))]
public void T20_ReadStructThrowsIfPlcIsNotConnected()
{
using (var notConnectedPlc = new Plc(CpuType.S7300, "255.255.255.255", 0, 0))
{
Assert.IsFalse(notConnectedPlc.IsConnected);
object tsObj = notConnectedPlc.ReadStruct<TestStruct>(DB2);
Assert.IsNull(tsObj);
}
}
/// <summary>
/// Tests that the method ReadClass returns the number of bytes read from the plc
/// </summary>
[TestMethod]
public void T21_ReadClassReturnsNumberOfReadBytesFromThePlc()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClass tc = new TestClass();
tc.BitVariable00 = true;
tc.BitVariable10 = true;
tc.DIntVariable = -100000;
tc.IntVariable = -15000;
tc.LRealVariable = -154.789;
tc.RealVariable = -154.789f;
tc.DWordVariable = 850;
tc.WStringVariable = "ÄÜÉÊéà";
tc.StringVariable = "Hallo";
plc.WriteClass(tc, DB2);
int expectedReadBytes = (int)Types.Class.GetClassSize(tc);
TestClass tc2 = new TestClass();
// Values that are read from a class are stored inside the class itself, that is passed by reference
int actualReadBytes = plc.ReadClass(tc2, DB2);
Assert.AreEqual(expectedReadBytes, actualReadBytes);
}
[TestMethod]
public void T22_ReadClassWithArray()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClassWithArrays tc = new TestClassWithArrays();
tc.Bool = true;
tc.BoolValues[1] = true;
tc.Int = int.MinValue;
tc.Ints[0] = int.MinValue;
tc.Ints[1] = int.MaxValue;
tc.Short = short.MinValue;
tc.Shorts[0] = short.MinValue;
tc.Shorts[1] = short.MaxValue;
tc.Double = float.MinValue;
tc.Doubles[0] = float.MinValue + 1;
tc.Doubles[1] = float.MaxValue;
tc.Single = float.MinValue;
tc.Singles[0] = float.MinValue + 1;
tc.Singles[1] = float.MaxValue;
tc.UShort = ushort.MinValue + 1;
tc.UShorts[0] = ushort.MinValue + 1;
tc.UShorts[1] = ushort.MaxValue;
plc.WriteClass(tc, DB2);
TestClassWithArrays tc2 = plc.ReadClass<TestClassWithArrays>(DB2);
Assert.AreEqual(tc.Bool, tc2.Bool);
Assert.AreEqual(tc.BoolValues[0], tc2.BoolValues[0]);
Assert.AreEqual(tc.BoolValues[1], tc2.BoolValues[1]);
Assert.AreEqual(tc.Int, tc2.Int);
Assert.AreEqual(tc.Ints[0], tc2.Ints[0]);
Assert.AreEqual(tc.Ints[1], tc.Ints[1]);
Assert.AreEqual(tc.Short, tc2.Short);
Assert.AreEqual(tc.Shorts[0], tc2.Shorts[0]);
Assert.AreEqual(tc.Shorts[1], tc2.Shorts[1]);
Assert.AreEqual(tc.Double, tc2.Double);
Assert.AreEqual(tc.Doubles[0], tc2.Doubles[0]);
Assert.AreEqual(tc.Doubles[1], tc2.Doubles[1]);
Assert.AreEqual(tc.Single, tc2.Single);
Assert.AreEqual(tc.Singles[0], tc2.Singles[0]);
Assert.AreEqual(tc.Singles[1], tc2.Singles[1]);
Assert.AreEqual(tc.UShort, tc2.UShort);
Assert.AreEqual(tc.UShorts[0], tc2.UShorts[0]);
Assert.AreEqual(tc.UShorts[1], tc2.UShorts[1]);
}
[TestMethod]
public void T23_ReadClassWithArrayAndCustomType()
{
Assert.IsTrue(plc.IsConnected, "Before executing this test, the plc must be connected. Check constructor.");
TestClassWithCustomType tc = new TestClassWithCustomType();
tc.Int = int.MinValue;
tc.CustomType = new CustomType();
tc.CustomType.Bools[1] = true;
tc.CustomTypes[0] = new CustomType();
tc.CustomTypes[1] = new CustomType();
tc.CustomTypes[0].Bools[0] = true;
tc.CustomTypes[1].Bools[1] = true;
plc.WriteClass(tc, DB2);
TestClassWithCustomType tc2 = plc.ReadClass<TestClassWithCustomType>(DB2);
Assert.AreEqual(tc.Int, tc2.Int);
Assert.AreEqual(tc.CustomType.Bools[0], tc2.CustomType.Bools[0]);
Assert.AreEqual(tc.CustomType.Bools[1], tc2.CustomType.Bools[1]);
Assert.AreEqual(tc.CustomTypes[0].Bools[0], tc2.CustomTypes[0].Bools[0]);
Assert.AreEqual(tc.CustomTypes[0].Bools[1], tc2.CustomTypes[0].Bools[1]);
Assert.AreEqual(tc.CustomTypes[1].Bools[0], tc2.CustomTypes[1].Bools[0]);
Assert.AreEqual(tc.CustomTypes[1].Bools[1], tc2.CustomTypes[1].Bools[1]);
}
[TestMethod]
public void T24_IsAvailableReturnsFalseIfIPAddressIsNotReachable()
{
plc.Close();
S7TestServer.Stop();
var unreachablePlc = new Plc(CpuType.S7300, "255.255.255.255", 0, 2);
try
{
unreachablePlc.Open();
}
catch
{
}
Assert.IsFalse(unreachablePlc.IsConnected);
}
[TestMethod]
public void T25_IsAvailableReturnsTrueIfIPAddressIsReachable()
{
plc.Close();
S7TestServer.Stop();