package_list_spec.rb

# frozen_string_literal: true

require "spec_helper"
require "dagger/package_list"

module Dagger
  RSpec.describe PackageList do
    it { is_expected.to respond_to(:add) }

    describe "#add" do
      it "accepts single entries" do
        list = described_class.new

        list.add(1)
        list.add(2)
        list.add(3)

        expect(list.to_a).to eq [1, 2, 3]
      end

      it "accepts an array of entries" do
        list = described_class.new

        list.add([1, 2, 3])

        expect(list.to_a).to eq [1, 2, 3]
      end

      it "adds entries idempotently" do
        list = described_class.new

        list.add(1)
        list.add(1)

        expect(list.to_a).to eq [1]
      end

      it "maintains insertion order" do
        list = described_class.new

        list.add([5, 1, 2, 3])
        list.add([2, 3, 4])

        expect(list.to_a).to eq [5, 1, 2, 3, 4]
      end
    end
  end
end