Capybara::Maleficent

Capybara is a fantastic testing tool. In our experience, we've encountered fragile feature specs when running headless browsers.

At it's core, Capybara::Maleficent exposes a method for wrapping blocks of code within sleep intervals (see Capybara::Maleficent.with_sleep_injection), rescuing handled exceptions and trying again. Yes, this is not ideal, as it slows down potential tests. But it is far worse (again in our experience) to have a of Capybara spec fail erratically.

This gem goes a step further, when you require 'capybara/maleficent/spindle', then the node matchers will automatically make use of the .with_sleep_injection behavior.

The nature of Capybara::Maleficent is such that most of the time the matching will be as fast as they can be (they're slow enough as you are leveraging a browser for this testing). However, when a failure occurs, Capybara::Maleficent assumes that its due to a slowness in the browser (and not an actual failure). From there, it sleeps for a bit, then tries again.

In you Gemfile:

gem 'capybara-maleficent', require 'false'

In your spec/spec_helper.rb

require 'capybara/maleficent/spindle'