using_types_spec.rb

  context "structs" do
    subject(:schema) do
      Dry::Validation.Schema do
        required(:person).filled(Person)
      end
    end

    class Name < Dry::Struct::Value
      attribute :given_name, 'strict.string'
      attribute :family_name, 'strict.string'
    end

    class Person < Dry::Struct::Value
      attribute :name, Name
    end

    it 'handles nested structs' do
      expect(schema.(person: { name: { given_name: 'Tim', family_name: 'Cooper' } })).to be_success
    end

    it 'fails when input is not valid' do
      expect(schema.(person: {name: {given_name: 'Tim'}}).messages).to eq(
        person: { name: { family_name: ["is missing"] } }
      )
    end
  end