d-unseductable/rspec-has

it { has.to change(Gem, :count).by(1) }

Rspec::Has

Designed to prettify one-liners when you have block expectations for subject.

Creates an alias RSpec::Core::MemoizedHelpers.has to expect { subject }

Simple to use:

class SimplePrinter
  def initialize
    print 'Printer is ready'
  end
end

This goes to

it { has.to output('Printer is ready').to_stdout }

instead of

specify { expect { subject }.to output('Printer is ready').to_stdout }

For more complicated cases:

describe UserFactory do
  subject { UserFactory.create_user }

  it { has.to change(User, :count).by(1) }
  it { has.to output.to_stdout }

  context 'with database issues' do
    it { has.to output.to_stderr }
    it { has.to raise_error }
  end
end

This change allows to DRY up, prettify and make specs even more readable.

Installation

Add this line to your application's Gemfile:

gem 'rspec-has'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rspec-has

Contributing

1. Fork it ( https://github.com/d-unseductable/rspec-has/fork )
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 a new Pull Request