spec.rb

class User; end
class Company; end
class Package 
  def initialize(owner:)
  end
  def cost(distance)
  end 
end 

RSpec.shared_examples 'cheap package' do 
  it { is_expected.to be < 100 }
  it { is_expected.to be > 50 }
end 

RSpec.shared_examples 'expensive package' do 
  it { is_expected.to be >= 500 }
  it { is_expected.to be < 1000 }
end 

RSpec.describe Package do
  let(:package) { described_class.new(owner: owner) }

  describe '#cost' do
    subject { package.cost(distance) }
    
    context 'when owned by company' do 
      let(:owner) { Company.new }
      
      context 'long range' do 
        let(:distance) { 10000 }
      
        it_behaves_like 'expensive package'
      end 
    
      context 'mid range' do 
        let(:distance) { 5000 }
      
        it_behaves_like 'expensive package'
      end 
    
      context 'short range' do 
        let(:distance) { 1000 }
      
        it_behaves_like 'cheap package'
      end 
    end 
    
    # .. different pricing for User ...
  end
end