adding sample testcase to reproduce bug (AT Declaration Truck)

VectoCore/VectoCoreTest/Integration/XMLReportTest.cs

@@ -78,7 +78,7 @@ namespace TUGraz.VectoCore.Tests.Integration
 
 			var manufacturerReport = xmlReport.FullReport;
 
-			Assert.AreEqual(5, manufacturerReport.XPathSelectElement("//*[local-name()='VehicleGroup']").Value.ToInt());
+			Assert.AreEqual(5, manufacturerReport.XPathSelectElement("//*[local-name()='VehicleGroup']")?.Value.ToInt());
 
 			var reportWheels = manufacturerReport.XPathSelectElements("//*[local-name()='TyreCertificationNumber']").ToList();
 			var i = 0;

VectoCore/VectoCoreTest/VectoCoreTest.csproj

@@ -2721,6 +2721,9 @@
     </Content>
     <Content Include="TestData\XML\XMLReaderDeclaration\vecto_engine-sample.xml" />
     <Content Include="TestData\XML\XMLReaderDeclaration\vecto_gearbox-sample.xml" />
+    <Content Include="TestData\XML\XMLReaderDeclaration\vecto_vehicle-sample_AT.xml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="TestData\XML\XMLReaderDeclaration\vecto_vehicle-sample_noAirdrag.xml">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>

VectoCore/VectoCoreTest/XML/XMLReportTest.cs

@@ -46,14 +46,17 @@ namespace TUGraz.VectoCore.Tests.XML
 	public class XMLReportTest
 	{
 		const string SampleVehicleDecl = "TestData/XML/XMLReaderDeclaration/vecto_vehicle-sample.xml";
-		
+
+		const string SampleVehicleDeclAT = "TestData/XML/XMLReaderDeclaration/vecto_vehicle-sample_AT.xml";
+
 		[OneTimeSetUp]
 		public void RunBeforeAnyTests()
 		{
 			Directory.SetCurrentDirectory(TestContext.CurrentContext.TestDirectory);
 		}
 
-		[TestCase(SampleVehicleDecl)]
+		[TestCase(SampleVehicleDecl),
+		TestCase(SampleVehicleDeclAT)]
 		public void RunDeclarationJob(string filename)
 		{
 			var fileWriter = new FileOutputWriter(filename);