p3.3.advanced-testing

possible issues?

• functions/modules are tight coupled

  very high risk to brake code by implicit change

• props drilling

  env:namespaces                                          < --- env config
  env:code
  
  -> lambda_handler(event, context)                       < --- entry point / front controller
      -> build_result(context, key, namespaces, code)     < --- modules
          -> request_status(context, namespace, code)
              -> _sanitize_code(code)
  

• tests are not adequate

  it's hard to mock/stub dependencies of count_items()

  questions:

  • are these tests isolated? NO
  • is source code loosely coupled? NO
  • are these tests maintainable? NO
  • do they really perform unittest? NO

  notes:

  • requires to mock whole hierarchy
  • there are some hidden non-easy testable resources (boto3 seesion/client)