public void HorizontalSimpleRangeTest()
        {
            string[] GetRowData(IXLWorksheet sheet, int idx, int itemCnt, int offset)
            {
                var clmNumber = (char)('a' + itemCnt * 2);
                var row       = idx * 3 + offset;

                return(sheet.Range($"B{row}:{clmNumber}{row}").Cells().Select(x => x.GetString()).ToArray());
            }

            var testData = TestOrder.GetTestData(4).ToArray();

            XlTemplateTest("Horizontal_SimpleTemplate.xlsx",
                           tpl => tpl.AddVariable("Orders", testData),
                           wb =>
            {
                var sheet = wb.Worksheet(1);
                for (int i = 0; i < testData.Length; i++)
                {
                    var itemCnt = testData[i].ProductsWithQuantities.Count;
                    sheet.Cell("B" + (i * 3 + 1)).Value.Should().Be(testData[i].OrderNumber);
                    var header = GetRowData(sheet, i, itemCnt, 2);
                    header.Length.Should().Be(itemCnt * 2);
                    for (int j = 0; j < itemCnt; j += 2)
                    {
                        header[j].Should().Be("Name");
                        header[j + 1].Should().Be("Quantity");
                    }
                    var data = GetRowData(sheet, i, itemCnt, 3);
                    data.Length.Should().Be(itemCnt * 2);
                    for (int j = 0; j < itemCnt; j++)
                    {
                        data[j * 2].Should().Be(testData[i].ProductsWithQuantities[j].ProductName);
                        data[j * 2 + 1].Should().Be(testData[i].ProductsWithQuantities[j].Quantity.ToString());
                    }
                }
            });
        }