System.ArgumentNullException in NCrunch Tests window

Hello.

I'm using NCrunch v3.14.0.1

I have a .NET project which Visual Studio is building without a hitch. However, when NCrunch is doing it's own build of the solution, the following error appears in the [h]NCrunch Test[/h] window:

System.ArgumentNullException: Value cannot be null.
Parameter name: source
at System.Linq.Enumerable.Select[TSource,TResult](IEnumerable`1 source, Func`2 selector)
at nCrunch.Module.MSTest.Integration.MSTestStaticDiscoverer.resolveDataRowParameters(ReflectedAttribute dataRowAttribute)
at nCrunch.Module.MSTest.Integration.MSTestDynamicDiscoverer.<>c__DisplayClass7_0.<FindFrameworkTestsInAssembly>b__1()
at nCrunch.Common.PerformanceTracking.PerfTracker.TrackActivity(String name, Action activity)
at nCrunch.Common.PerformanceTracking.PerfTracker.TryTrackActivity(String name, Action activity)
at nCrunch.Module.MSTest.Integration.MSTestDynamicDiscoverer.FindFrameworkTestsInAssembly(ReflectedAssembly assembly, FilePath assemblyFilePath, IList`1 referencedAssemblyFilePaths, ComponentUniqueName testComponentUniqueName, PlatformType platformType, DynamicProxy[] dynamicProxies)
at nCrunch.TestExecution.TestFinder..()
at nCrunch.Common.PerformanceTracking.PerfTracker.TrackActivity(String name, Action activity)
at nCrunch.TestExecution.TestFinder..()
at nCrunch.Common.PerformanceTracking.PerfTracker.TrackActivity(String name, Action activity)
at nCrunch.TestExecution.TestFinder.FindTestsForFrameworks(ReflectedAssembly assembly, FilePath assemblyFilePath, IList`1 referencedAssemblyFilePaths, DescribedTestFrameworkDiscoverer[] describedDiscoverers, ComponentUniqueName testComponentUniqueName, PlatformType platformType, DynamicProxy[] dynamicProxies)
at nCrunch.Compiler.StaticManipulation.BuiltAssembly.DiscoverTests(TestFrameworkDescription[] applicableTestFrameworks, ComponentUniqueName testComponentUniqueName)
at nCrunch.Compiler.RemoteBuildRunner.(ComponentBuildParameters , FilePath , BuildOutput , DirectoryPath[] , FilePath[] )
at nCrunch.Compiler.RemoteBuildRunner..()
at nCrunch.Common.PerformanceTracking.PerfTracker.TrackActivity(String name, Action activity)
at nCrunch.Compiler.RemoteBuildRunner.(ComponentBuildParameters )

I have used previous versions of NCrunch with this same solution, and that worked fine regards test discovery and building. I think the problem started with this specific version, but I'm not 100% sure.

Thanks.
Jason.

Hi, thanks for posting.

This is probably a limitation from the use of static analysis when discovering MSTest DataRow tests. Transferring some types from the static domain into a dynamic one for runtime can sometimes be problematic. I'd suggest changing your 'Framework utilisation type for MSTest' setting to 'DynamicAnalysis' for better compatibility with these framework features.