Adds coverage for CSV and XLSX file download

spec/fixtures/reports/sales_tax_by_order/sales_tax_by_order.csv

@@ -0,0 +1,5 @@
+Distributor,Order Cycle,Order number,Tax Category,Tax Rate Name,Tax Rate,Total excl. tax ($),Tax,Total incl. tax ($),First Name,Last Name,Code,Email
+Distributor,oc1,ORDER_NUMBER_1,tax_category,State,0.015,115.0,1.73,116.73,cfname,clname,ABC123,[email protected]
+Distributor,oc1,ORDER_NUMBER_1,tax_category,Country,0.025,115.0,2.88,117.88,cfname,clname,ABC123,[email protected]
+Distributor,oc1,ORDER_NUMBER_2,tax_category,State,0.015,215.0,3.23,218.23,c2fname,c2lname,DEF456,[email protected]
+Distributor,oc1,ORDER_NUMBER_2,tax_category,Country,0.025,215.0,5.38,220.38,c2fname,c2lname,DEF456,[email protected]

spec/system/admin/reports/sales_tax/sales_tax_totals_by_order_spec.rb

@@ -105,7 +105,7 @@
     it "generates the report" do
       login_as admin
       visit admin_reports_path
-      click_on I18n.t("admin.reports.sales_tax_totals_by_order")
+      click_on "Sales Tax Totals By Order"
 
       expect(page).to have_button("Go")
       click_on "Go"
@@ -167,7 +167,7 @@
     it "generates the report" do
       login_as admin
       visit admin_reports_path
-      click_on I18n.t("admin.reports.sales_tax_totals_by_order")
+      click_on "Sales Tax Totals By Order"
 
       expect(page).to have_button("Go")
       click_on "Go"
@@ -335,7 +335,7 @@
 
       login_as admin
       visit admin_reports_path
-      click_on I18n.t("admin.reports.sales_tax_totals_by_order")
+      click_on "Sales Tax Totals By Order"
     end
 
     it "should load all the orders" do
@@ -423,5 +423,58 @@
       expect(page.find("table.report__table tbody").text).to have_content(customer2_summary_row)
       expect(page).to have_selector(table_raw_selector, count: 6)
     end
+
+    describe "downloading" do
+      context "csv files" do
+        let(:report_file_csv) do
+          CSV.read("spec/fixtures/reports/sales_tax_by_order/sales_tax_by_order.csv")
+        end
+
+        it 'downloads the file' do
+          expect(downloaded_filenames.length).to eq(0) # downloads folder should be empty
+          select "CSV", from: "report_format"
+          click_on "Go"
+          wait_for_download
+          expect(downloaded_filenames.length).to eq(1) # downloads folder should contain 1 file
+          expect(downloaded_filename).to match(/.*\.csv/)
+          expect(CSV.read(downloaded_filename)).to eq(report_file_csv)
+        end
+      end
+
+      context "xlsx files" do
+        let(:report_file_xlsx) do
+          File.open("spec/fixtures/reports/sales_tax_by_order/sales_tax_by_order.xlsx")
+        end
+
+        it 'downloads the file' do
+          expect(downloaded_filenames.length).to eq(0) # downloads folder should be empty
+          select "Spreadsheet", from: "report_format"
+          find("#display_summary_row").uncheck
+          click_on "Go"
+          wait_for_download
+          expect(downloaded_filenames.length).to eq(1) # downloads folder should contain 1 file
+          expect(downloaded_filename).to match(/.*\.xlsx/)
+          downloaded_content = extract_xlsx_rows(downloaded_filename, 1..5)
+          fixture_content = extract_xlsx_rows(report_file_xlsx, 1..5)
+          expect(downloaded_content).to eq(fixture_content)
+        end
+
+        def extract_xlsx_rows(file, range)
+          xlsx = Roo::Excelx.new(file)
+          range.map { |i| xlsx.row(i) }
+        end
+      end
+
+      context "pdf files" do
+        it 'downloads the file' do
+          expect(downloaded_filenames.length).to eq(0) # downloads folder should be empty
+          select "PDF", from: "report_format"
+          click_on "Go"
+          wait_for_download
+          expect(downloaded_filenames.length).to eq(1) # downloads folder should contain 1 file
+          expect(downloaded_filename).to match(/.*\.pdf/)
+        end
+      end
+    end
   end
 end