public class Fixture
{
    private CompositionContainer _container;
 
    public Fixture()
    {
        var catalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
        _container = new CompositionContainer(catalog);
    }
 
    [Fact]
    public void Overriding_metadata_replaces_inherited_metadata()
    {
        var export =
            _container.GetExport<Analytics>();
 
        Assert.Equal("TEST", export.Value.TrackableItems.First().Metadata.Category);
    }
}