public void GetDownloadsReadyForUpload_WhenNoFilesReadyForUpload_ReturnsEmptyList()
        {
            dbDataReaderMock.ClearSubstitute();
            dbDataReaderMock.Read().Returns(false);

            List <int> actual = systemUnderTest.GetDownloadsReadyForUpload().ToList();

            Assert.That(actual.Count, Is.EqualTo(0));
        }