Add headless browser system test for events calendar JS rendering

Agent-Logs-Url: https://github.com/ElixirTeSS/TeSS/sessions/2a3b05a5-ac64-45dd-90f2-21a62813e5bb

Co-authored-by: fbacall <503373+fbacall@users.noreply.github.com>

Author: Copilot

Gemfile

@@ -91,10 +91,12 @@ group :development do
 end
 
 group :test do
+  gem 'capybara'
   gem 'committee'
   gem 'minitest'
   gem 'minitest-reporters'
   gem 'rails-controller-testing'
+  gem 'selenium-webdriver'
   gem 'vcr'
   gem 'webmock'
 end

Gemfile.lock

@@ -135,6 +135,15 @@ GEM
       railties (>= 3.1)
     builder (3.3.0)
     byebug (11.1.3)
+    capybara (3.40.0)
+      addressable
+      matrix
+      mini_mime (>= 0.1.3)
+      nokogiri (~> 1.11)
+      rack (>= 1.6.0)
+      rack-test (>= 0.6.3)
+      regexp_parser (>= 1.5, < 3.0)
+      xpath (~> 3.2)
     case_transform (0.2)
       activesupport
     cgi (0.5.1)
@@ -640,6 +649,7 @@ GEM
       faraday (>= 1)
       faraday-multipart (>= 1)
     ruby-progressbar (1.13.0)
+    rubyzip (2.4.1)
     safely_block (0.4.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -658,6 +668,10 @@ GEM
       tilt
     scanf (1.0.0)
     securerandom (0.4.1)
+    selenium-webdriver (4.16.0)
+      rexml (~> 3.2, >= 3.2.5)
+      rubyzip (>= 1.2.2, < 3.0)
+      websocket (~> 1.0)
     sentry-rails (5.11.0)
       railties (>= 5.0)
       sentry-ruby (~> 5.11.0)
@@ -800,13 +814,16 @@ GEM
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
     webrick (1.9.1)
+    websocket (1.2.11)
     websocket-driver (0.8.0)
       base64
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     whenever (1.0.0)
       chronic (>= 0.6.3)
     will_paginate (4.0.0)
+    xpath (3.2.0)
+      nokogiri (~> 1.8)
     yaml-ld (0.0.3)
       json-ld (~> 3.3)
       psych (>= 3.3)
@@ -830,6 +847,7 @@ DEPENDENCIES
   bootstrap-sass
   bootstrap-tab-history-rails
   byebug
+  capybara
   committee
   country_select
   devise
@@ -880,6 +898,7 @@ DEPENDENCIES
   ruby-openai
   sass-rails
   sassc-rails
+  selenium-webdriver
   sentry-rails
   sentry-ruby
   sentry-sidekiq

test/application_system_test_case.rb

@@ -0,0 +1,8 @@
+require 'test_helper'
+
+class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
+  driven_by :selenium, using: :headless_chrome, screen_size: [1400, 1400] do |options|
+    options.add_argument('--no-sandbox')
+    options.add_argument('--disable-dev-shm-usage')
+  end
+end

…tion/events_calendar_integration_test.rb …st/system/events_calendar_system_test.rbtest/integration/events_calendar_integration_test.rb renamed to test/system/events_calendar_system_test.rb test/integration/events_calendar_integration_test.rb renamed to test/system/events_calendar_system_test.rb

@@ -1,7 +1,7 @@
-require 'test_helper'
+require 'application_system_test_case'
 
-class EventsCalendarIntegrationTest < ActionDispatch::IntegrationTest
-  test 'calendar page loads and renders event calendar' do
+class EventsCalendarSystemTest < ApplicationSystemTestCase
+  test 'calendar tab loads and renders events with javascript' do
     freeze_time(Time.utc(2026, 5, 20, 12, 0, 0)) do
       Event.create!(
         title: 'System calendar event',
@@ -15,12 +15,12 @@ class EventsCalendarIntegrationTest < ActionDispatch::IntegrationTest
         country: 'United Kingdom'
       )
 
-      get calendar_events_path
+      visit events_path
 
-      assert_response :success
-      assert_select '#events-calendar #calendar.simple-calendar'
-      assert_select '#events-calendar table.table.table-striped'
-      assert_select '#events-calendar a.clear-both', text: 'System calendar event'
+      within('.index-display-options') { click_link 'Calendar' }
+
+      assert_selector('#events_calendar #calendar.simple-calendar')
+      assert_selector('#events_calendar a.clear-both', text: 'System calendar event')
     end
   end
 end