Destroy method test doesn't fail, although JavaScript alert window is used - ruby-on-rails

Question

I have a Rails App, testing with RSpec and Capybara
I have following test:
context 'destroy user' do
scenario "should be successful" do
user = User.create(first_name: 'John', last_name: 'Doe', email: 'john.doe#example.com')
visit users_path
click_link 'Destroy'
# expect { click_link 'Destroy' }.to change(User, :count).by(-1)
expect(page).to have_content 'User was successfully destroyed'
end
end
I have following link in the browser:
<%= link_to "Destroy", user_path(user), method: :delete, data: { confirm: "Are you sure?" } %>
I run the test, and the test passes. It shouldn't pass, since I have the alert window before calling the action.
I installed
brew cask install chromedriver
because I wanted to test JS, but unfortunately test is not failing.
rails_helper.rb
# This file is copied to spec/ when you run 'rails generate rspec:install'
require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
# Prevent database truncation if the environment is production
abort("The Rails environment is running in production mode!") if Rails.env.production?
# Add additional requires below this line. Rails is not loaded until this point!
require 'rspec/rails'
require 'capybara/rails'
# Capybara.default_driver = :selenium_chrome ### not working
# require "support/factory_bot"
Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }
begin
ActiveRecord::Migration.maintain_test_schema!
rescue ActiveRecord::PendingMigrationError => e
puts e.to_s.strip
exit 1
end
RSpec.configure do |config|
# Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
config.fixture_path = "#{::Rails.root}/spec/fixtures"
config.use_transactional_fixtures = true
config.infer_spec_type_from_file_location!
# Filter lines from Rails gems in backtraces.
config.filter_rails_from_backtrace!
end
Once the test fails, I would improve the test with:
accept_confirm do
click_link 'Destroy'
end
I think my problem is, I don't know where to put the line:
Capybara.default_driver = :selenium_chrome ### not working
Where do I create the file for the config of Capybara? In the official documentation, they say in the lib/capybara.rb
I tried there, and I get the error:
An error occurred while loading ./spec/models/user_spec.rb.
Failure/Error: require File.expand_path('../../config/environment', __FILE__)
Bundler::GemRequireError:
There was an error while trying to load the gem 'capybara'.
Gem Load Error is: uninitialized constant Capybara
Backtrace for gem load error is:
/Users/albert/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:74:in `block in load_missing_constant'
/Users/albert/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:8:in `without_bootsnap_cache'

Answer 1

You don't show your Capybara config (default_driver/javascript_driver), and you also don't have js metadata on your test which would imply you're possibly using the rack_test driver to run your tests. The rack_test driver doesn't support JS and therefore would completely ignore the JS confirm. If you want to test JS behaviors you need to make sure you're using a driver that actually supports JS - see https://github.com/teamcapybara/capybara#drivers and https://github.com/teamcapybara/capybara#using-capybara-with-rspec