ABAP Unit Testing in SAP S/4HANA — Part 2: Test Doubles, Dependency Injection, and Mocking Strategies for Real-World Sys

If you’ve already read Part 1 of our ABAP Unit Testing series , you know the foundation: why tests matter, how to structure them, and what makes a test valuable rather than ceremonial. Now it’s time to get into the harder stuff—the part that most ABAP developers avoid because it feels complicated. I’m talking about test doubles, dependency injection, and mocking in ABAP . Here’s the honest truth: writing a unit test that calls real database tables, triggers actual BAPIs, or depends on system con