Ytukyg

I am trying to create a custom data collector for several xUnit tests, but I am running into the following issue:

Data collection: Could not find data collector 'MyDataCollector'

To create the Data Collector in question, I've followed the tutorial in this article.

My Data Collector looks like this:

namespace Test.DataCollectorLibrary

{

    [DataCollectorFriendlyName("MyDataCollector")]

    [DataCollectorTypeUri("my://new/datacollector")]

    public class MyDataCollector : DataCollector

    {

        int i = 0;

        private string tempDirectoryPath = Path.GetTempPath();

        private DataCollectionEnvironmentContext context;

        private DataCollectionSink dataCollectionSink;

        private DataCollectionLogger logger;



        public override void Initialize(XmlElement configurationElement,

            DataCollectionEvents events,

            DataCollectionSink dataSink,

            DataCollectionLogger logger,

            DataCollectionEnvironmentContext environmentContext)

        {

            events.TestHostLaunched += this.TestHostLaunched_Handler;

            events.SessionStart += this.SessionStarted_Handler;

            events.SessionEnd += this.SessionEnded_Handler;

            events.TestCaseStart += this.Events_TestCaseStart;

            events.TestCaseEnd += this.Events_TestCaseEnd;



            this.context = environmentContext ?? throw new ArgumentNullException(nameof(environmentContext));

            this.dataCollectionSink = dataSink ?? throw new ArgumentNullException(nameof(dataSink));

            this.logger = logger ?? throw new ArgumentNullException(nameof(logger));

        }



        private void Events_TestCaseStart(object sender, TestCaseStartEventArgs e)

        {

            this.logger.LogWarning(this.context.SessionDataCollectionContext, "TestCaseStarted " + e.TestCaseName);

            this.logger.LogWarning(this.context.SessionDataCollectionContext, "TestCaseStarted " + e.TestElement.FullyQualifiedName);

            var filename = Path.Combine(this.tempDirectoryPath, "testcasefilename" + i++ + ".txt");

            File.WriteAllText(filename, string.Empty);

            this.dataCollectionSink.SendFileAsync(e.Context, filename, true);

        }

I am trying to run the tests using the "dotnet test" command, from the directory where the unit tests (including the C# project file) live, like so:

[unit tests directory]>dotnet test --collect:"MyDataCollector" --test-adapter-path "../Test.DataCollectorLibrary/bin/Debug/netcoreapp2.0"

The command above is run in PowerShell. Both the unit tests and the MyDataCollector are .NET Core 2.0 projects, in a Visual C# solution. In the "dotnet test" command above, "../Test.DataCollectorLibrary/bin/Debug/netcoreapp2.0" is the path to Test.DataCollectorLibrary.dll.

Here is the output in the PowerShell console:

What's the problem here? Why is my Data Collector not being found?