require 'hound/tools/rubocop_yml'

require_relative 'template_spec'

RSpec.describe Hound::Tools::RubocopYml do
  filename = '.rubocop.yml'
  it_behaves_like 'a template', filename

  describe '#generate' do
    before do
      allow(IO).to receive(:read).
        with(/lib\/hound\/tools\/templates\/_#{filename}$/).and_call_original
      allow($stderr).to receive(:puts)
      allow($stdout).to receive(:puts)
    end

    context "with no #{filename}" do
      before do
        allow(IO).to receive(:read).with("#{filename}").and_raise(Errno::ENOENT)
        allow(IO).to receive(:write).with("#{filename}", anything)
        allow(FileUtils).to receive(:mkpath).with(File.dirname('.'))
      end

      it "creates a valid #{filename} file" do
        expect(IO).to receive(:write).with("#{filename}", anything) do |_file, data|
          expect(data).to be
          config = YAML::load(data)

          expected = %w(.hound/defaults.yml .hound/overrides.yml .rubocop_todo.yml)
          expect(config['inherit_from']).to match_array(expected)
          expect(config['AllCops']).to include('RunRailsCops' => true)
        end

        subject.generate
      end
    end

    context "with existing invalid #{filename}" do
      before do
        allow(IO).to receive(:read).with("#{filename}").and_return(data)
      end

      context "with no 'inherit_from' section" do
        let(:data) { 'foo: :bar' }

        it 'says the file is invalid' do
          msg = "Error: #{filename} is invalid! (No 'inherit_from' section)"
          expect($stderr).to receive(:puts).with(msg)
          subject.generate
        end

        it 'returns false' do
          expect(subject.generate).to be_falsey
        end
      end

      context "when inherit_from lacks '.hound/defaults.yml'" do
        let(:data) { "inherit_from:\n\  bar: baz" }

        it 'says the file is invalid' do
          msg = "Error: #{filename} is invalid! ('.hound/defaults.yml' not inherited)"
          expect($stderr).to receive(:puts).with(msg)
          subject.generate
        end
      end
    end
  end
end