Add images and documents settings to admin panel

spec/features/admin/settings_spec.rb

@@ -98,6 +98,40 @@ describe "Admin settings" do
 
   end
 
+  describe "Update content types" do
+
+    scenario "stores the correct mime types" do
+      setting = Setting.create(key: "upload.images.content_types", value: "image/png")
+      admin = create(:administrator).user
+      login_as(admin)
+      visit admin_settings_path
+      find("#images-and-documents-tab").click
+
+      within "#edit_setting_#{setting.id}" do
+        expect(find("#png")).to be_checked
+        expect(find("#jpg")).not_to be_checked
+        expect(find("#gif")).not_to be_checked
+
+        check "gif"
+
+        click_button "Update"
+      end
+
+      expect(page).to have_content "Value updated"
+      expect(Setting["upload.images.content_types"]).to include "image/png"
+      expect(Setting["upload.images.content_types"]).to include "image/gif"
+
+      visit admin_settings_path(anchor: "tab-images-and-documents")
+
+      within "#edit_setting_#{setting.id}" do
+        expect(find("#png")).to be_checked
+        expect(find("#gif")).to be_checked
+        expect(find("#jpg")).not_to be_checked
+      end
+    end
+
+  end
+
   describe "Skip verification" do
 
     scenario "deactivate skip verification", :js do