To test whether two arrays have the same elements regardless of order, you can use the =~ matcher in RSpec < 2.11:

actual_array.should =~ expected_array

If either side is an ActiveRecord scope rather than an array, you should call to_a on it first, since =~ does not play nice with scopes:

actual_scope.to_a.should =~ expected_scope.to_a

If you use RSpec >= 2.11 we recommend using the match_array or contain_exactly matchers instead of =~.
Use the eq matcher only if the order of records matters.

RSpec let's you chain a matcher with .or. The expectation will then pass if at least one matcher matches:

expect(color).to eq("red").or eq("green")

Real-world example

A real-world use case would be to test if the current page has a button with the label "Foo". There are many ways to render a button with CSS:

<input type="button" value="Foo">
<input type="submit" value="Foo">
<button>Foo</button>

We cannot express it with a single have_css() matcher, since we need the { text: 'Foo' } optio...

Don't insert table rows in a Rails database migration. This will break tests that expect that database to be empty and cause you all sorts of pain.

If you need a place for default application data, use db/seed.rb or put a script into lib/scripts. It won't run automatically, so add a chore story to Pivotal Tracker as a reminder.

Note: You might also want to check out BoxCryptor which does pretty much the same, and is supported across many more platforms. I just didn't want to use Dropbox...

I use Ubuntu One to automatically sync confidential files between my machines. The encryption is done via encfs, which is a file-based encryption that simply puts encrypted versions of files from one folder into another. This is well-suited for cloud storage, since it allows syncing single files, not whole crypt containers.

Recipe

I'll ass...

If possible your code should detect features, not browsers. But sometimes you just need to sniff the browser. And when you do, you're probably fighting a Microsoft product.

The following function returns a Number like 10, 11, 12, 13 for Internet Explorer or Edge (anything above 11 is Edge). It returns undefined for any other browser.

function ieVersion(uaString) {
  uaString = uaString || navigator.userAgent;
  var match = /\...

In whenever you can schedule Ruby code directly like so:

every 1.day, :at => '4:30 am' do
  runner "MyModel.task_to_run_at_four_thirty_in_the_morning"
end

Combined with the best practice to hide background tasks behind a single static methods you can test, this is probably preferable to defining additional Rake tasks.

Unfortunately when whenever register a runner command, it doesn't use bundle exec in the resulting crontab. This gets you errors like this:

`gem_original_require': no suc...

When you update your ChromeDriver to version 75 or beyond, you might get w3c errors in your tests.

For example, reading the browser console for errors no longer works, and page.driver.browser.manage.logs.get(:browser) will raise an error like "undefined method `log' for #<Selenium::WebDriver::Remote::W3C::Bridge:0x000055903f307aa8>".

Add options.add_option('w3c', false) to your Selenium configuration (e.g. features/support/selenium.rb) and you should be back to normal:

Capybara.register_driver :selenium do |app|
  options ...

Our gem Mail Magnet allows you to override e-mail recipients in ActionMailer so all mails go to a given address.

This is useful for staging environments where you want to test production-like mail delivery without sending e-mails to real users.

Rails 4:

config.action_controller.action_on_unpermitted_parameters enables logging or raising an exception if parameters that are not explicitly permitted are found. Set to :log or :raise to enable. The default value is :log in development and test environments, and false in all other environments.

Rails 3:

If you include the strong_params gem, see the Readme for handling unpermitted keys.