Test drag-and-drop schedule editor

spec/support/jquery_macros.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+module JQueryMacros
+  # Wait for one jQuery Ajax request during the block
+  def wait_for_ajax
+    flag = "window.ajax_#{SecureRandom.alphanumeric(16)}"
+    page.execute_script "#{flag} = false; $(document).one('ajaxComplete', () => #{flag} = true);"
+
+    yield
+
+    Timeout.timeout(Capybara.default_max_wait_time) { loop until page.evaluate_script(flag) }
+    page.execute_script "delete #{flag};"
+  end
+end