How To Fix ABAP_TESTDOUBLE000 - &4 Invalid method call &1 on test double API

SAP Error Message - Details

• Message type: E = Error

• Message class: ABAP_TESTDOUBLE -

• Message number: 000

• Message text: &4 Invalid method call &1 on test double API

What causes this issue?

Possibly because there was no mockable method between two calls of the
cl_abap_testdouble=>configure_call(..) api method OR there was a call
to the non mockable CLASS-METHOD or a method which was set as FINAL in
the class that is being mocked.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ABAP_TESTDOUBLE000 - &4 Invalid method call &1 on test double API ?

  The SAP error message ABAP_TESTDOUBLE000 with the description "Invalid method call &1 on test double API" typically occurs in the context of unit testing in ABAP when using test doubles (mocks, stubs, etc.) to simulate the behavior of objects.
  Cause:
  This error usually arises due to one of the following reasons:
  
  Invalid Method Call: The method you are trying to call on the test double does not exist or is not defined in the interface or class that the test double is supposed to mimic.
  Incorrect Test Double Configuration: The test double may not have been set up correctly, or the method you are trying to call has not been properly configured in the test double.
  API Misuse: The test double API might be used incorrectly, such as calling methods in an unsupported manner or in an incorrect sequence.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  Check Method Name: Ensure that the method name you are calling on the test double is correct and matches the method defined in the original class or interface.
  Review Test Double Setup: Verify that the test double has been correctly instantiated and configured. Make sure that all necessary methods are defined and that you are using the correct syntax for setting up the test double.
  Consult Documentation: Refer to the SAP documentation for the test double API to ensure you are using it correctly. This includes checking the expected parameters and return types for the methods you are calling.
  Debugging: Use debugging tools to step through the code and identify where the invalid method call is occurring. This can help you pinpoint the exact issue.
  Check for Updates: Ensure that your SAP system is up to date, as there may be patches or updates that address issues with the test double API.
  
  Related Information:
  
  Test Doubles in ABAP: Test doubles are used in unit testing to isolate the unit of work from its dependencies. They can be mocks, stubs, or fakes, depending on the testing needs.
  Unit Testing Framework: Familiarize yourself with the ABAP Unit Testing framework, which provides tools and methods for writing and executing unit tests in ABAP.
  SAP Community: If you continue to face issues, consider reaching out to the SAP Community or forums where other developers may have encountered similar problems.
  
  By following these steps, you should be able to identify and resolve the cause of the ABAP_TESTDOUBLE000 error in your unit tests.