```ruby
RSpec.describe SolidusEasypost::ShipmentBuilder do
  describe '.from_package', vcr: { cassette_name: 'shipment_builder/from_package' } do
    it 'builds a shipment with the correct attributes' do
      shipment = described_class.from_package(create(:shipment).to_package)

      expect(shipment).to have_attributes(object: 'Shipment')
    end
  end

  describe '.from_shipment', vcr: { cassette_name: 'shipment_builder/from_shipment' } do
    it 'builds a shipment with the correct attributes' do
      shipment = described_class.from_shipment(create(:shipment))

      expect(shipment).to have_attributes(object: 'Shipment')
    end
  end

  describe '.from_return_authorization', vcr: { cassette_name: 'shipment_builder/from_return_authorization' } do
    it 'builds a shipment with the correct attributes' do
      shipment = described_class.from_return_authorization(create(:return_item).return_authorization)

      expect(shipment).to have_attributes(object: 'Shipment')
    end
  end
end
```

Fix the spec using the right return authorization
user
```ruby
# frozen_string_literal: true

RSpec.describe SolidusEasypost::ShipmentBuilder do
  describe '.from_package', vcr: { cassette_name: 'shipment_builder/from_package' } do
    it 'builds a shipment with the correct attributes' do
      shipment = described_class.from_package(create(:shipment).to_package)

      expect(shipment).to have_attributes(object: 'Shipment')
    end
  end

  describe '.from_shipment', vcr: { cassette_name: 'shipment_builder/from_shipment' } do
    it 'builds a shipment with the correct attributes' do
      shipment = described_class.from_shipment(create(:shipment))

      expect(shipment).to have_attributes(object: 'Shipment')
    end
  end

  describe '.from_return_authorization', vcr: { cassette_name: 'shipment_builder/from_return_authorization' } do
    it 'builds a shipment with the correct attributes' do
      solidus_return_authorization = create(:return_item).return_authorization
      shipment = described_class.from_return_authorization(SolidusEasypost::ReturnAuthorization.new(solidus_return_authorization))

      expect(shipment).to have_attributes(object: 'Shipment')
    end
  end
end
```
assistant