old_contents: import os
  
  import testinfra.utils.ansible_runner
  
  testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')
  
  def test_service_elasticsearch_running(host):
      assert host.service("elasticsearch").is_running is True
  
  def test_service_mongodb_running(host):
      if host.system_info.distribution == 'ubuntu' and host.system_info.codename == 'focal':
          mongodb_service_name = 'mongodb'
      else:
          mongodb_service_name = 'mongod'
  
      assert host.service(mongodb_service_name).is_running is True
  
  def test_is_graylog_installed(host):
      assert host.package('graylog-server').is_installed
  
  def test_service_graylog_running(host):
      assert host.service("graylog-server").is_running is True
  
new_contents: import os
  
  import testinfra.utils.ansible_runner
  from selenium import webdriver
  from selenium.webdriver.common.keys import Keys
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  import time
  
  testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')
  
  def test_basic_login(host):
      driver = webdriver.Chrome()
      wait = WebDriverWait(driver, 10)
  
      url = 'http://' + host.interface('eth0').addresses[0] + ':9000'
  
      driver.get(url + "/gettingstarted")
  
      element = wait.until(EC.title_is(('Graylog - Sign in')))
  
      #login
      uid_field = driver.find_element_by_name("username")
      uid_field.clear()
      uid_field.send_keys("admin")
      password_field = driver.find_element_by_name("password")
      password_field.clear()
      password_field.send_keys("admin")
      password_field.send_keys(Keys.RETURN)
  
      element = wait.until(EC.title_is(('Graylog - Getting started')))
  
      driver.close()
  
  def test_service_elasticsearch_running(host):
      assert host.service("elasticsearch").is_running is True
  
  def test_service_mongodb_running(host):
      if host.system_info.distribution == 'ubuntu' and host.system_info.codename == 'focal':
          mongodb_service_name = 'mongodb'
      else:
          mongodb_service_name = 'mongod'
  
      assert host.service(mongodb_service_name).is_running is True
  
  def test_is_graylog_installed(host):
      assert host.package('graylog-server').is_installed
  
  def test_service_graylog_running(host):
      assert host.service("graylog-server").is_running is True
  
subject: Add Selenium test for basic logic.