Positive and Negative Assertions

right_user_spec.rb

describe User do
  describe '#visit' do
    it 'increases the visited attractions count after one visit' do
      subject.visit('Rome')
      subject.visited_attractions_count.should == 1
    end 

    it "doesn't increase the visited attractions count after several visits" do
      5.times { subject.visit('Rome') }
      subject.visited_attractions_count.should_not > 1
    end 
  end
end 

user.rb

class User
  def visit(attraction)
    # ...
  end

  def visited_attractions_count
    # ...
  end
end

wrong_user_spec.rb

describe User do
  describe '#visit' do
    it 'increases the visited attractions count after one visit' do
      subject.visit('Rome')
      subject.visited_attractions_count.should == 1
    end 

    it "doesn't increase the visited attractions count after several visits" do
      5.times { subject.visit('Rome') }
      subject.visited_attractions_count.should == 1
    end 
  end
end