Short version

• Capybara has a global option (Capybara.ignore_hidden_elements) that determines whether Capybara sees or ignores hidden elements.
• Prefer not to change this global option, and use the :visible option when calling page.find(...). This way the behavior is only changed for this one find and your step doesn't have confusing side effects.
• Every Capybara driver has its own notion of "visibility".

Long version

Capybara has an option (Capybara.ignore_hidden_elements) to configure the default...

json is part of the standard library of Ruby and deals with JSON, obviously. As you know, JSON is the string format that represents simple data structures. Ruby data structures that resemble Javascript objects can be serialized to JSON with #to_json. These can be restored from a JSON string with JSON.parse().

So what could go wrong here?

JSON.parse("a".to_json)

It will raise JSON::ParserError (784: unexpected token at '"a"'). But why?

Generating JSON vs serializing objects

J...

Although it's tempting flirt with detecting mobile/touch devices with CSS media queries or Javascript feature detection alone, this approach will be painful when heavily customizing a feature beyond just tweaking the looks. Eventually you will want want the same detection logic to be available on both server and client side.

This card shows how to get a Ruby method touch_device? for your Rails views and a method TouchDevice.isPresent() for your Javascripts.

Note that we are detecting touch devices by grepping the user agent, and the ke...

Capybara clears cookies before each scenario, but not other client-side data stores. If your app is using localStorage or sessionStorage, contents will bleed into the next scenario.

Use this hook to remove all site data after each scenario:

After do
  if Capybara.current_driver == :selenium && !Capybara.current_url.starts_with?('data:')
    page.execute_script <<-JAVASCRIPT
      localStorage.clear();
      sessionStorage.clear();
    JAVASCRIPT
  end
end

Working with lists in Javascript is painful because the native Array class is so poorly designed.

One way to reduce the pain is to to use Underscore.js's functions like _.each, _.map or _.select, which unfortunately clutters your code with awkward calls to the _ helper.

Fortunately when you use CoffeeScript you don't need any of that. CoffeeScript has a very versatile for keyword that can do anything that each, collect or select can do. Enjoy!

each

f...

geordi, our collection of awesome shell scripts, has been extended by three scripts to help you call RSpec or Cucumber:

cuc

This script runs Cucumber the way you want it:

• Prints some line feeds to easily find your test results when you come back to the console later
• Configures Cucumber to use cucumber_spinner if it is available in your Gemfile
• Runs Cucumber under bundle exec
• Uses an old version of Firefox for Selenium (Javascript) features...

We proudly release our safe_cookies middleware into public beta and just published it on Github.

Features are:

• make all application cookies secure and HttpOnly (keeping them from being sent over HTTP and protecting them from Javascript)
• rewrite all client cookies once, making them secure and HttpOnly
• notification if a request has unregistered cookies (no unsecure cookie will slip by)
• ability to ignore external cookies, like __utma and other tracking cookies
• easy configurat...

This will give the target site full access to your Javascript environment through window.opener, if the target is on the same domain.

Even if the target site is on another domain, it still has some access and can for example manipulate window.location to perform a phishing attack.

You may use a rel="noopener" attribute to avoid this in modern browsers, except IE or Edge.