rspec-something

Something expects one message in your example.

Without rspec-something:

mail = double
expect(mail).to receive(:deliver)
expect(UserMailer).to receive(:hello).and_return mail

With rspec-something:

expect(UserMailer).to receive(:hello).and_return something.deliver

Congrats. You saved two lines.

Add this line to your application's Gemfile:

gem 'rspec-something'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rspec-something

Require and include matcher:

require 'rspec/something'

RSpec.configure do |config|
  config.include RSpec::Something
end

See example in "What is this?" section for actual usage.

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request