How To Fix CDS_UNIT_MESSAGE027 - Unit testing of &1 is not possible.

CDS_UNIT_MESSAGE027 - Overview

• Message type: E = Error

• Message class: CDS_UNIT_MESSAGE - Message Class

• Message number: 027

• Message text: Unit testing of &1 is not possible.

Because test double creation is not possible for &V2& as &V3& testing is
already enabled for &V4&.

Error message extract from SAP system. Copyright SAP SE.

CDS_UNIT_MESSAGE027 - Details

• The SAP error message CDS_UNIT_MESSAGE027 indicates that unit testing for a Core Data Services (CDS) view or entity is not possible. This error typically arises when there are issues with the configuration or definition of the CDS view that prevent it from being tested.
  Causes:
  
  Missing Annotations: The CDS view may lack the necessary annotations that are required for unit testing.
  Incompatible Data Model: The data model used in the CDS view may not be compatible with unit testing.
  Incorrect Implementation: There may be issues in the implementation of the CDS view, such as syntax errors or logical errors.
  Dependencies: The CDS view might depend on other views or tables that are not available or not properly defined.
  Authorization Issues: The user executing the unit test may not have the necessary authorizations to access the CDS view or its underlying data.
  
  Solutions:
  
  Check Annotations: Ensure that the CDS view has the required annotations for unit testing. You may