require "fileutils"

shared_examples_for "finds definitions" do
  before do
    allow(FactoryBot).to receive(:load)
    FactoryBot.find_definitions
  end

  subject { FactoryBot }
end

RSpec::Matchers.define :load_definitions_from do |file|
  match do |given|
    @has_received = have_received(:load).with(File.expand_path(file))
    @has_received.matches?(given)
  end

  description do
    "load definitions from #{file}"
  end

  failure_message do
    @has_received.failure_message
  end
end

describe "definition loading" do
  def self.in_directory_with_files(*files)
    before do
      @pwd = Dir.pwd
      @tmp_dir = File.join(File.dirname(__FILE__), "tmp")
      FileUtils.mkdir_p @tmp_dir
      Dir.chdir(@tmp_dir)

      files.each do |file|
        FileUtils.mkdir_p File.dirname(file)
        FileUtils.touch file
      end
    end

    after do
      Dir.chdir(@pwd)
      FileUtils.rm_rf(@tmp_dir)
    end
  end

  describe "with factories.rb" do
    in_directory_with_files "factories.rb"
    it_should_behave_like "finds definitions" do
      it { should load_definitions_from("factories.rb") }
    end
  end

  %w[spec test].each do |dir|
    describe "with a factories file under #{dir}" do
      in_directory_with_files File.join(dir, "factories.rb")
      it_should_behave_like "finds definitions" do
        it { should load_definitions_from("#{dir}/factories.rb") }
      end
    end

    describe "with a factories file under #{dir}/factories" do
      in_directory_with_files File.join(dir, "factories", "post_factory.rb")
      it_should_behave_like "finds definitions" do
        it { should load_definitions_from("#{dir}/factories/post_factory.rb") }
      end
    end

    describe "with several factories files under #{dir}/factories" do
      in_directory_with_files File.join(dir, "factories", "post_factory.rb"),
        File.join(dir, "factories", "person_factory.rb")
      it_should_behave_like "finds definitions" do
        it { should load_definitions_from("#{dir}/factories/post_factory.rb") }
        it { should load_definitions_from("#{dir}/factories/person_factory.rb") }
      end
    end

    describe "with several factories files under #{dir}/factories in non-alphabetical order" do
      in_directory_with_files File.join(dir, "factories", "b.rb"),
        File.join(dir, "factories", "a.rb")
      it "loads the files in the right order" do
        allow(FactoryBot).to receive(:load)
        wd = File.dirname(__FILE__)
        file_b = File.join(wd, "tmp", dir, "factories", "b.rb")
        file_a = File.join(wd, "tmp", dir, "factories", "a.rb")

        FactoryBot.find_definitions

        expect(FactoryBot).to have_received(:load).with(file_a).ordered
        expect(FactoryBot).to have_received(:load).with(file_b).ordered
      end
    end

    describe "with nested and unnested factories files under #{dir}" do
      in_directory_with_files File.join(dir, "factories.rb"),
        File.join(dir, "factories", "post_factory.rb"),
        File.join(dir, "factories", "person_factory.rb")
      it_should_behave_like "finds definitions" do
        it { should load_definitions_from("#{dir}/factories.rb") }
        it { should load_definitions_from("#{dir}/factories/post_factory.rb") }
        it { should load_definitions_from("#{dir}/factories/person_factory.rb") }
      end
    end

    describe "with deeply nested factory files under #{dir}" do
      in_directory_with_files File.join(dir, "factories", "subdirectory", "post_factory.rb"),
        File.join(dir, "factories", "subdirectory", "person_factory.rb")
      it_should_behave_like "finds definitions" do
        it { should load_definitions_from("#{dir}/factories/subdirectory/post_factory.rb") }
        it { should load_definitions_from("#{dir}/factories/subdirectory/person_factory.rb") }
      end
    end
  end
end