public void TestAllowingEmptyDatasets(bool allowEmptyDatasetExtractions)
{
Pipeline p = SetupPipeline();
TruncateDataTable();
var host = new ExtractionPipelineUseCase(_request.Configuration.Project, _request, p, DataLoadInfo.Empty);
var engine = host.GetEngine(p, new ThrowImmediatelyDataLoadEventListener());
host.Source.AllowEmptyExtractions = allowEmptyDatasetExtractions;
var token = new GracefulCancellationToken();
if (allowEmptyDatasetExtractions)
{
var dt = host.Source.GetChunk(new ThrowImmediatelyDataLoadEventListener(), token);
Assert.IsNull(host.Source.GetChunk(new ThrowImmediatelyDataLoadEventListener(), token));
Assert.AreEqual(0, dt.Rows.Count);
Assert.AreEqual(3, dt.Columns.Count);
}
else
{
var exception = Assert.Throws <Exception>(() => host.Source.GetChunk(new ThrowImmediatelyDataLoadEventListener(), token));
Assert.IsTrue(exception.Message.StartsWith("There is no data to load, query returned no rows, query was"));
}
p.DeleteInDatabase();
}