_spec.rb

context 'create npm resources' do
    let(:facts) do
      facts
    end
    let('nodejs::npm') do
      {
        'myapp' => {
          'ensure' => "present",
          'target' => "/var/www/apps/myapp",
          'use_package_json' => true
        }
      }
    end
    
    it { is_expected.to contain_nodejs__npm('myapp')}
  end