What is Capybara and how do I use it for testing in Rails?

What is Capybara and how do I use it for testing in Rails?

Capybara is a Ruby library used for integration testing in Rails applications. It simulates how a user would interact with your app.

Can you give me an example of a simple test using Capybara?

Sure! Here's a basic example:

require 'capybara/rspec'

feature 'User login' do
  scenario 'with valid credentials' do
    visit '/login'
    fill_in 'Email', with: '[email protected]'
    fill_in 'Password', with: 'password'
    click_button 'Log in'
    expect(page).to have_content 'Welcome back!'
  end
end

What are some common issues I might face when using Capybara?

Common issues include dealing with asynchronous JavaScript, ensuring elements are visible before interacting, and managing timeouts.

How can I run my Capybara tests in a headless browser?

You can run tests in a headless browser by using the selenium driver with a headless option. For example:

Capybara.register_driver :selenium do |app|
  Capybara::Selenium::Driver.new(app, browser: :chrome, options: Selenium::WebDriver::Chrome::Options.new(args: ['headless']))
end