This document discusses SAP ABAP Test Seams, a technique for unit testing code with external dependencies. It introduces Moose2Model, a tool that generates circuit diagrams from code to help developers understand software structure. The document recommends Test Seams as they allow testing to be added more easily and separated from production code with minimal risk. Moose2Model is presented as an automation tool that can create and update diagrams fast, reducing cognitive load during coding.

1. A new Test Tool in SAP
Circuit Diagram for Code
SAP ABAP Test Seams
Moose2Model
Referent: Rainer Winkler
Date: 11 September 2018

2. Unit Tests are fine
If external dependencies
can be managed

3. SAP ABAP Test Seams
For Unit Tests
with external dependencies

4. Coding Testcoding
Syntax Check based on
Coding
Syntax Check based on
Testcoding

5. Test Inser)ons can be done
mul)ple )mes
Typical applica)on:
1. Insert a fail statement in the setup method of the test
2. Insert the test coding in the test

6. Works fine
When a few simple rules are followed in
the insertion
See
h=ps://blogs.sap.com/2018/06/08/abap-test-seam-for-unit-test-with-external-dependencies-personal-guideline/
for complete list
1 – Implement inserted test coding correctly
2 – Monitor whether all Test Seams have a
Test Injec)on

7. No need to implement the Test Seam Pa=ern
manually
Test and produc)ve coding are well separated
Can be added to Legacy Code with minimal risk
Other techniques to handle dependencies can
be be=er
If they are used
If they are worth the addi)onal effort

8. Before Test Seams where available
I wrote Tests only some)mes
With Test Seams, I do it much more
oTen

9. What other computer languages provide
Test Seams as part of the language?
Do we need this in Smalltalk?

10. Search for Test Seam and SAP or
ABAP on the internet for more
informa)ons

11. 2 Circuit diagrams for soTware
Moose2Model

15. Can this help developers?
Yes - with tools
that automa)ze
crea)on and upda)ng

16. Context Menu of Moose Model -> Read Layout from Path
Moose2Model - Display exis)ng diagram

17. I worked on the "Suppress Other Logic" yesterday,
which elements where to be regarded?
The methods and
classes are displayed
together with there
dependencies

18. What is displayed?
Highlighted elements are
always displayed (as long as
they are in the extrac)on)
Other elements only
when they exist
Right click on deskop -> Redraw ... with forma`ng info

19. Customize
Rearange elements - will be stored to file

20. Add comments

21. Highlight neighbours (Helps in big diagrams)

22. Explore
More elements are shown
Redo this

23. Simplify
(Exclude some elements, for instance for logging...)

24. Architecture Diagrams
Show only groupings (class/packages)

25. Diagrams can be made fast
Diagram genera)on is relaxing (automa)za)on)
Keeping diagrams correct is relaxing (automa)zed)
Diagrams are (always) correct
Reduces cogni)ve load during coding

26. www.moose2model.org
MIT License
h=ps://youtu.be/k8RkDwlXKmg
Works currently for SAP and Smalltalk,
could work for all languages where an extractor to Moose exists