Restructure and extens tests for converter

Sharp7.Rx.Tests/S7ValueConverterTests/ReadFromBuffer.cs

@@ -0,0 +1,51 @@
+using NUnit.Framework;
+using Shouldly;
+
+namespace Sharp7.Rx.Tests.S7ValueConverterTests;
+
+[TestFixture]
+internal class ReadFromBuffer : ConverterTestBase
+{
+    [TestCaseSource(nameof(GetValidTestCases))]
+    [TestCaseSource(nameof(GetAdditinalReadTestCases))]
+    public void Read(ConverterTestCase tc)
+    {
+        //Arrange
+        var convert = CreateReadMethod(tc);
+
+        //Act
+        var result = convert.Invoke(null, [tc.Data, tc.VariableAddress]);
+
+        //Assert
+        result.ShouldBe(tc.Value);
+    }
+
+    public static IEnumerable<ConverterTestCase> GetAdditinalReadTestCases()
+    {
+        yield return new ConverterTestCase(true, "DB0.DBx0.4", [0x1F]);
+        yield return new ConverterTestCase(false, "DB0.DBx0.4", [0xEF]);
+        yield return new ConverterTestCase("ABCD", "DB0.string0.10", [0x04, 0x04, 0x41, 0x42, 0x43, 0x44]); // Length in address exceeds PLC string length
+    }
+
+    [TestCase((char) 18, "DB0.DBB0", new byte[] {0x12})]
+    [TestCase((ushort) 3532, "DB0.INT0", new byte[] {0xF2, 0x34})]
+    [TestCase(0.25, "DB0.D0", new byte[] {0x3E, 0x80, 0x00, 0x00})]
+    public void Invalid<T>(T template, string address, byte[] data)
+    {
+        //Arrange
+        var variableAddress = Parser.Parse(address);
+
+        //Act
+        Should.Throw<InvalidOperationException>(() => S7ValueConverter.ReadFromBuffer<T>(data, variableAddress));
+    }
+
+    [TestCase(3532, "DB0.DINT0", new byte[] {0xF2, 0x34})]
+    public void Argument<T>(T template, string address, byte[] data)
+    {
+        //Arrange
+        var variableAddress = Parser.Parse(address);
+
+        //Act
+        Should.Throw<ArgumentException>(() => S7ValueConverter.ReadFromBuffer<T>(data, variableAddress));
+    }
+}