require 'helper'

describe 'Backend' do # rubocop:disable Metrics/BlockLength
  let(:backend) { Inspec::Backend.create(Inspec::Config.mock) }

  describe 'create' do # rubocop:disable Metrics/BlockLength
    it 'accepts an Inspec::Config' do
      backend.is_a?(Inspec::Backend::Base).must_equal true
    end

    it 'raises an error if no transport backend can be found' do
      Train.stub :create, nil do
        err = proc { backend }.must_raise RuntimeError
        err.message.must_equal "Can't find transport backend 'mock'."
      end
    end

    it 'raises an error if no connection can be created' do
      mock_transport = Minitest::Mock.new
      mock_bad_connection = Minitest::Mock.new
      mock_transport.expect :nil?, false
      mock_transport.expect :connection, mock_bad_connection
      mock_bad_connection.expect :nil?, true

      Train.stub :create, mock_transport do
        err = proc { backend }.must_raise RuntimeError
        err.message.must_equal "Can't connect to transport backend 'mock'."
      end
    end

    it 'enables/disables caching based on `config[:backend_cache]`' do
      cache_enabled_config = Inspec::Config.new(backend_cache: true)
      cache_enabled_backend = Inspec::Backend.create(cache_enabled_config)
      cache_enabled_backend.backend.cache_enabled?(:file).must_equal true
      cache_enabled_backend.backend.cache_enabled?(:command).must_equal true

      cache_disabled_config = Inspec::Config.new(backend_cache: false)
      cache_disabled_backend = Inspec::Backend.create(cache_disabled_config)
      cache_disabled_backend.backend.cache_enabled?(:file).must_equal false
      cache_disabled_backend.backend.cache_enabled?(:command).must_equal false
    end

    it 'enables caching when using a mock backend' do
      backend.backend.cache_enabled?(:file).must_equal true
      backend.backend.cache_enabled?(:command).must_equal true
    end

    it 'disables caching when `config[:debug_shell]` is true' do
      debug_shell_config = Inspec::Config.new(debug_shell: true)
      debug_shell_backend = Inspec::Backend.create(debug_shell_config)
      debug_shell_backend.backend.cache_enabled?(:file).must_equal false
      debug_shell_backend.backend.cache_enabled?(:command).must_equal false
    end

    it 'captures Train::ClientError' do
      Train.stub(:create, proc { raise Train::ClientError }) do
        err = proc { backend }.must_raise RuntimeError
        err.message.must_equal "Client error, can't connect to 'mock' backend: "
      end
    end

    it 'captures Train::TransportError' do
      Train.stub(:create, proc { raise Train::TransportError }) do
        err = proc { backend }.must_raise RuntimeError
        err.message.must_equal "Transport error, can't connect to 'mock' backend: "
      end
    end
  end

  describe 'version' do
    it 'returns the current InSpec version' do
      backend.version.must_equal Inspec::VERSION
    end
  end

  describe 'local_transport?' do
    it 'returns false when using a Mock transport' do
      backend.local_transport?.must_equal false
    end

    it 'returns true when using a Local transport' do
      local_backend = Inspec::Backend.create(Inspec::Config.new)
      local_backend.local_transport?.must_equal true
    end
  end

  describe 'to_s' do
    it 'returns the correct string' do
      backend.to_s.must_equal 'Inspec::Backend::Class'
    end
  end

  describe 'inspect' do
    it 'returns the correct string' do
      backend.inspect.must_equal 'Inspec::Backend::Class @transport=Train::Transports::Mock::Connection'
    end
  end
end