# spec/models/user_spec.rb
describe User do
  context 'basic user' do
    # instantiate FactoryGirl :user fixture
    with :user
    it { user.should be_inactive }
    it { user.should_not be_happy }
  end
end

# spec/models/user_spec.rb
describe User do
  context 'when user.first_name == nil' do
    # instantiate FactoryGirl :user fixture with custom options
    with :user, :first_name => nil
    it { user.should be_inactive }
    it { user.should_not be_happy }
  end

  context 'when user is inactive' do
    # instantiate FactoryGirl :user fixture with custom traits
    with :user, :when_inactive
    it { user_when_inactive.should be_inactive }
  end
end

# Bundler Gemfile
gem 'factory_girl_rspec'