public void SourceReader_WillIgnoreNegativeNumbers()
        {
            /*
             *
             *  A            B            C            D
             * 1                Henrik       Alice        Simpson
             * 2   222222       100          50
             * 3   333333       0            100          200
             * 4   444444       150          -10          300
             *
             */
            var parameters = new InputParameters();

            parameters.ElementIdSpan = "A2A4";
            parameters.BuyersSpan    = "B1D1";

            // Reusing columns to simplify test
            parameters.BrickLinkDescriptionSpan = "A2A4";
            parameters.BrickLinkIdSpan          = "A2A4";
            parameters.BrickLinkColorSpan       = "A2A4";
            parameters.TlgColorSpan             = "A2A4";

            var sheet = new Mock <IXLWorksheet>();

            ExcelMocker.AddMockRange(sheet, "A2A4");
            ExcelMocker.AddMockRange(sheet, "B1D1");

            ExcelMocker.CreateMockCell("Henrik", 1, 2, sheet);
            ExcelMocker.CreateMockCell("Alice", 1, 3, sheet);
            ExcelMocker.CreateMockCell("Simpson", 1, 4, sheet);

            ExcelMocker.CreateMockCell("222222", 2, 1, sheet);
            ExcelMocker.CreateMockCell("333333", 3, 1, sheet);
            ExcelMocker.CreateMockCell("444444", 4, 1, sheet);

            ExcelMocker.CreateMockCell("100", 2, 2, sheet);
            ExcelMocker.CreateMockCell("0", 3, 2, sheet);
            ExcelMocker.CreateMockCell("150", 4, 2, sheet);

            ExcelMocker.CreateMockCell("50", 2, 3, sheet);
            ExcelMocker.CreateMockCell("100", 3, 3, sheet);
            ExcelMocker.CreateMockCell("-10", 4, 3, sheet);

            ExcelMocker.CreateMockCell("", 2, 4, sheet);
            ExcelMocker.CreateMockCell("200", 3, 4, sheet);
            ExcelMocker.CreateMockCell("300", 4, 4, sheet);

            var reader = new SourceReader(sheet.Object, parameters);

            var result = reader.GetReservations();

            Assert.That(result.Count, Is.EqualTo(6));
            Assert.True(result.Any(x => x.Element.ElementID == "222222" && x.Buyer.Name == "Henrik" && x.Amount == 100));
            Assert.True(result.Any(x => x.Element.ElementID == "444444" && x.Buyer.Name == "Henrik" && x.Amount == 150));
            Assert.True(result.Any(x => x.Element.ElementID == "222222" && x.Buyer.Name == "Alice" && x.Amount == 50));
            Assert.True(result.Any(x => x.Element.ElementID == "333333" && x.Buyer.Name == "Alice" && x.Amount == 100));
            Assert.True(result.Any(x => x.Element.ElementID == "333333" && x.Buyer.Name == "Simpson" && x.Amount == 200));
            Assert.True(result.Any(x => x.Element.ElementID == "444444" && x.Buyer.Name == "Simpson" && x.Amount == 300));
        }