How To Fix CDS_UNIT_MESSAGE035 - Creation of test doubles is not permitted for &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CDS_UNIT_MESSAGE - Message Class

• Message number: 035

• Message text: Creation of test doubles is not permitted for &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CDS_UNIT_MESSAGE035 - Creation of test doubles is not permitted for &1 ?

  The SAP error message CDS_UNIT_MESSAGE035, which states "Creation of test doubles is not permitted for &1," typically occurs in the context of Core Data Services (CDS) and ABAP Unit testing. This error indicates that the system is trying to create a test double (a mock or stub) for a CDS view or entity that does not allow it.
  Cause:
  The primary cause of this error is that the CDS view or entity you are trying to test is not designed to support test doubles. This can happen for several reasons:
  
  Non-Deterministic Behavior: The CDS view may have non-deterministic behavior or dependencies on database state that cannot be easily mocked.
  Complex Logic: The logic within the CDS view may be too complex or involve database operations that are not suitable for unit testing.
  Restrictions in CDS: Certain CDS features or annotations may restrict the ability to create test doubles.
  
  Solution:
  To resolve this error, consider the following approaches:
  
  
  Refactor the Code: If possible, refactor the logic in your CDS view to make it more testable. This might involve breaking down complex views into simpler components that can be tested individually.
  
  
  Use Integration Tests: Instead of unit tests with test doubles, consider using integration tests that run against a real database. This way, you can validate the behavior of the CDS view without needing to create test doubles.
  
  
  Check Annotations: Review the annotations used in your CDS view. Some annotations may prevent the creation of test doubles. Ensure that the view is designed with testability in mind.
  
  
  Mocking Alternatives: If you need to test the logic that depends on the CDS view, consider mocking the service or class that consumes the CDS view instead of the view itself.
  
  
  Consult Documentation: Refer to the SAP documentation for any specific guidelines or limitations regarding unit testing with CDS views.
  
  
  Related Information:
  
  ABAP Unit Testing: Familiarize yourself with the principles of ABAP unit testing and how to structure your tests effectively.
  CDS Views: Understand the capabilities and limitations of CDS views in SAP, including how they interact with the database and their intended use cases.
  SAP Community: Engage with the SAP Community or forums for insights from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to address the CDS_UNIT_MESSAGE035 error and improve the testability of your CDS views.