Fix for failing Rubocop tests.

config/environments/test.rb

@@ -62,6 +62,9 @@
   # config.action_view.annotate_rendered_view_with_filenames = true
 
   config.i18n.enforce_available_locales = false
+
+  # Add config/routes_test.rb to routes
+  config.paths['config/routes.rb'] << Rails.root.join('config/routes_test.rb')
 end
 
 # Used by Rails' routes url_helpers (typically when including a link in an email)

config/routes_test.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+Rails.application.routes.draw do
+  # Define your test-specific routes here
+
+  # This route will return an empty response with a 200 OK status code
+  # when the browser requests the favicon.ico file.
+  get '/favicon.ico', to: proc { |_env| [200, {}, ['']] }
+end

spec/support/capybara.rb

@@ -6,13 +6,23 @@
 # Use the fast rack_test driver for non-feature tests by default
 Capybara.default_driver = :rack_test
 
+# Create a custom driver based on Capybara's :selenium_chrome_headless driver
+# This resolves a ElementClickInterceptedError when executing `click_button 'Sign in'` with DMP Assistant
+Capybara.register_driver :selenium_chrome_headless_add_window_size do |app|
+  # Get a copy of the default options for Capybara's :selenium_chrome_headless driver
+  options = Capybara.drivers[:selenium_chrome_headless].call.options[:options].dup
+  options.add_argument('--window-size=1920,1080') # default window-size is only (800x600)
+  # Create a new Selenium driver with the customised options
+  Capybara::Selenium::Driver.new(app, browser: :chrome, options: options)
+end
+
 RSpec.configure do |config|
   config.before(:each, type: :feature, js: false) do
     Capybara.use_default_driver
   end
 
   # Use the Selenium headless Chrome driver for feature tests
   config.before(:each, type: :feature, js: true) do
-    Capybara.current_driver = :selenium_chrome_headless
+    Capybara.current_driver = :selenium_chrome_headless_add_window_size
   end
 end