How To Fix ABAP_TESTDOUBLE027 - &4 Is Called Times cannot be negative

SAP Error Message - Details

• Message type: E = Error

• Message class: ABAP_TESTDOUBLE -

• Message number: 027

• Message text: &4 Is Called Times cannot be negative

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ABAP_TESTDOUBLE027 - &4 Is Called Times cannot be negative ?

  The SAP error message ABAP_TESTDOUBLE027 indicates that there is an issue with a test double (a mock or stub used in unit testing) in your ABAP code. Specifically, the message states that the number of times a method is called cannot be negative. This typically occurs in the context of unit tests where you are defining expectations for how many times a method should be invoked.
  Cause:
  The error is caused by an attempt to set the expected number of calls for a method to a negative value. This can happen if:
  
  There is a logical error in the test setup where the expected call count is incorrectly calculated or set.
  A variable that is supposed to hold the expected call count is not initialized properly or is manipulated in a way that results in a negative value.
  
  Solution:
  To resolve this error, you should:
  
  
  Review the Test Code: Check the unit test code where the test double is defined. Look for the part of the code where you specify the expected number of calls to the method.
  
  
  Check Variable Initialization: Ensure that any variables used to set the expected call count are properly initialized and not being set to negative values due to logic errors.
  
  
  Correct the Logic: If the expected call count is derived from some calculations or conditions, ensure that the logic does not lead to negative values. You may need to add checks to prevent negative values from being assigned.
  
  
  Use Assertions: If applicable, use assertions to validate that the expected call count is non-negative before it is used to set expectations on the test double.
  
  
  Debugging: If the issue is not immediately clear, consider adding debugging statements to log the values being used to set the expected call count.
  
  
  Related Information:
  
  Unit Testing in ABAP: Familiarize yourself with the concepts of unit testing in ABAP, especially how to use test doubles effectively.
  ABAP Test Double Framework: Understand the framework provided by SAP for creating test doubles, including how to set expectations and verify calls.
  Documentation: Refer to the official SAP documentation for unit testing in ABAP for more detailed guidelines and examples.
  
  By following these steps, you should be able to identify and fix the cause of the ABAP_TESTDOUBLE027 error in your unit tests.