Creating closest facility analysis layer during regression testing fails to load network layers to the map

[FanisDeligiannis]

Hello! I am trying some unit testing using the guide on regression testing (https://github.com/Esri/arcgis-pro-sdk/wiki/ProGuide-Regression-Testing)

Part of my addin, runs a closest facility algorithm. I'm using SDK to run the geoprocess "MakeClosestFacilityAnalysisLayer".

When I run it normally using the UI, it all works perfectly.

When I'm running it using regression testing, the geoprocess is successful with no errors/warnings, however, the Network Analysis Layer is not loaded to my active map. I have set an active map programmatically, and I have confirmed that the Closest Facility feature dataset is created in my default gdb, however, since it's not loaded to the map, I can't seem to actually load data to it or run it. 

internal static async Task<string> MakeAnalysisLayer(string network, string layer_name, ClosestFacilitySettings settings)
{
    string actual_layer_name = layer_name;
    int i = 1;
    while (MapView.Active.Map.FindLayers(actual_layer_name).Count > 0)
    {
        actual_layer_name = layer_name + "_" + i.ToString();
        i++;
    }


    var env = Geoprocessing.MakeEnvironmentArray(workspace: Project.Current.DefaultGeodatabasePath);

    var MakeClosestFacilityAnalysisLayerParameters = Geoprocessing.MakeValueArray(
        network,
        actual_layer_name,
        settings.travel_mode,
        settings.travel_direction.ToString(),
        settings.cutoff,
        settings.numberOfFacilities
        );

    var mcfalResult = await Geoprocessing.ExecuteToolAsync("MakeClosestFacilityAnalysisLayer", MakeClosestFacilityAnalysisLayerParameters, env, flags: GPExecuteToolFlags.AddOutputsToMap);

    return mcfalResult.ReturnValue;
}

Using the debugger, I'm seeing identical parameters, env values, network etc. The only difference is that the result is not loaded to the map.

I can't seem to fix it or find a workaround to make it work, not even a "hacky" one. Is this intended behavior, and if so, what's the proper way to do what I'm trying to do?