new_contents: import pytest
  
  
  def test_layer1(api):
      """Test layer1
      """
      config = api.config()
      config.layer1.layer1()
      assert(len(config.layer1) == 1)
  
  
  if __name__ == '__main__':
      pytest.main(['-vv', '-s', __file__])
  
subject: test to close #15