Selenium fails to detect JavaScript errors

Currently, I am utilizing Sinatra and my testing environment is structured in the following manner.

Gemfile:

gem 'rspec'
gem 'capybara'
gem 'pry'
gem 'selenium-webdriver'

spec_helper.rb

require 'view_helpers'
require 'capybara/rspec'
require 'rspec'
require 'selenium-webdriver'

Capybara.javascript_driver = :selenium

staticpages_integration_test.rb

require 'capybara/rspec'
require './app'

Capybara.app = Sinatra::Application 
set :show_exceptions, false 

...


describe 'ensuring the home page does not contain javascript errors', {:type => :feature } do

# Activating Selenium for JavaScript assessment 
before :all do
    Capybara.current_driver = :selenium
    visit '/'
end

it 'the home page should run scripts without error', :js => true do 
    expect(page).not_to have_errors
end 

# Disabling Selenium for regular testing 
after :all do
    Capybara.use_default_driver
end

end 

The remaining tests are loading properly and Selenium is executing while opening the Firefox browser. However, an error message is displayed as follows:

Failure/Error: expect(page).not_to have_errors
   expected #<Capybara::Session:0x007f8146be1e90> to respond to     `has_errors?`

I am seeking assistance in resolving this issue. I have attempted using error_message as a method as well, but it appears that Selenium is either not operating or lacks access to these methods. Could there be a missing dependency causing this problem? Your help is appreciated.

Alternatively, if there is a more efficient way to test for JavaScript errors, I would greatly appreciate any suggestions.

Answer №1

One of the limitations of Capybara is that it doesn't come with a have_errors matcher built-in. If you want to utilize this matcher, you'll have to opt for the capybara-webkit gem/driver over selenium.

Answer №2

Utilizing PhantomJS or Poltergeist in conjunction with Capybara for test automation can result in test failures due to errors, including JavaScript errors. Additionally, warnings related to JavaScript may be displayed, providing insight into potential issues within the website.

If identifying and addressing JS errors is critical for your testing requirements, I recommend incorporating teaspoon into your testing strategy.

When it comes to Selenium WD, actively monitoring JS errors on web pages may not be within its primary functionality, as there are other tools specifically designed for this purpose.

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