rspec_gandalf

Because some objects shall not pass.

Add this line to your application's Gemfile:

gem 'rspec_gandalf'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install rspec_gandalf

1. Create a file named "gandalf_test.rb"
2. Put this:

# coding: utf-8
require 'rspec_gandalf'

class Balrog;end;

class Men;end;

class Hobbit;end;

class TrollRog < Balrog;end;

class PretaGil < Balrog;end;

describe Men do
  it { shall pass }
end

describe Balrog do
  it { shall pass }
end

describe TrollRog do
  it { shall pass }
end

describe PretaGil do
  it { shall_not pass }
end

3. Test it

   $ rspec gandalf_test.rb

4. See the result

   1. Balrog Failure/Error: it { shall pass } ATTENTION: Balrog is a flame of Udun and SHALL NOT PASS.

   2. TrollRog Failure/Error: it { shall pass } RUN YOU FOOL. Your disguise doesn't trick me. ATTENTION: TrollRog is a flame of Udun and SHALL NOT PASS 4 examples, 2 failures Failed examples:

   rspec ./test.rb:19 # Balrog rspec ./test.rb:23 # TrollRog