Include inactive donation sites in csv export when corresponding filter is selected

app/views/donation_sites/index.html.erb

@@ -45,7 +45,7 @@
                 <%= clear_filter_button %>
                 <span class="float-right">
                   <%= modal_button_to("#csvImportModal", {icon: "upload", text: "Import Donation Sites", size: "md"}) if @donation_sites.empty? %>
-                  <%= download_button_to(donation_sites_path(format: :csv, filters: filter_params), {text: "Export Donation Sites", size: "md"}) if @donation_sites.any? %>
+                  <%= download_button_to(donation_sites_path(format: :csv, include_inactive_donation_sites: @include_inactive_donation_sites, filters: filter_params), {text: "Export Donation Sites", size: "md"}) if @donation_sites.any? %>
                   <%= new_button_to new_donation_site_path, {text: "New Donation Site"} %>
                 </span>
               </div>

spec/system/donation_site_system_spec.rb

@@ -20,6 +20,22 @@
       expect(page.find(:xpath, "//table/tbody/tr[1]/td[1]")).to have_content(@first.name)
       expect(page.find(:xpath, "//table/tbody/tr[3]/td[1]")).to have_content(@third.name)
     end
+
+    context "when exporting a csv with include inactive donation sites selected" do
+      it "includes active and inactive donation sites" do
+        create(:donation_site, name: "Active Donation Site")
+        create(:donation_site, name: "Inactive Donation Site", active: false)
+        visit subject
+        check "Also include inactive donation sites"
+        click_on "Filter"
+        click_on "Export Donation Sites"
+        wait_for_download
+        @csv_content = File.read(download)
+
+        expect(@csv_content).to have_content("Active Donation Site")
+        expect(@csv_content).to have_content("Inactive Donation Site")
+      end
+    end
   end
 
   context "When creating a new donation site" do