thoughtbot--factory_bot/spec/acceptance/sequence_context_spec.rb

describe "sequences are evaluated in the correct context" do
  before do
    define_class("User") do
      attr_accessor :id

      def awesome
        "aw yeah"
      end
    end
  end

  it "builds a sequence calling sprintf correctly" do
    FactoryBot.define do
      factory :sequence_with_sprintf, class: User do
        sequence(:id) { |n| sprintf("foo%d", n) }
      end
    end

    expect(FactoryBot.build(:sequence_with_sprintf).id).to eq "foo1"
  end

  it "invokes the correct method on the instance" do
    FactoryBot.define do
      factory :sequence_with_public_method, class: User do
        sequence(:id) { public_method(:awesome).call }
      end
    end

    expect(FactoryBot.build(:sequence_with_public_method).id).to eq "aw yeah"
  end

  it "invokes a method with no arguments on the instance" do
    FactoryBot.define do
      factory :sequence_with_frozen, class: User do
        sequence(:id) { frozen? }
      end
    end

    expect(FactoryBot.build(:sequence_with_frozen).id).to be false
  end

  it "allows direct reference of a method in a sequence" do
    FactoryBot.define do
      factory :sequence_referencing_attribute_directly, class: User do
        sequence(:id) { |n| "#{awesome}#{n}" }
      end
    end
    expect(FactoryBot.build(:sequence_referencing_attribute_directly).id).to eq "aw yeah1"
  end
end