Introduction into Test Driven Development (TDD) with ABAP Unit. Presented at SAP Inside Track Hamburg (sitHH) 2013: http://wiki.sdn.sap.com/wiki/display/events/SAP+Inside+Track+Hamburg+2013

1. ABAP Unit and TDD
Hendrik Neumann
SAP Inside Track Hamburg 2013
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2. Agenda
 Unit Testing & ABAP Unit
 Test Driven Development (TDD)
 Live Coding
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3. Unit Testing
Unit Testing is a method by which
individual units of source code are tested
to determine if they are fit to use.
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4. xUnit Framework
Provides an automated solution with no
need to write the same tests many times
and no need to remember what should be
the result of each test.
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5. xUnit Framework
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setup( )  test_method( )  teardown( )
assert_*( ) – methods

6. xUnit Framework
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setup( )  test_method( )  teardown( )
test_method( )
test_method( )
test_method( )
test_method( )
test_method( )
test_method( )

7. ABAP Unit
SAP‘s xUnit implemenation
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8. ABAP Unit
 Local test classes for global dev. artifacts
 In Reports, Function Modules and Classes
 Not acitve on production systems
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9. ABAP Unit
 Tools integration:
 ABAP Workbench
 Code Inspector Integration
 ABAP Unit Browser
 ABAP Test Cockpit (ATC)
 ABAP in Eclipse
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10. Test Driven Development
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11. Test Driven Development
 Never
 After you wrote your code
 Before you write your code
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When do you write your Unit Tests?
Test Driven Development

12. Test Driven Development
Test 1st
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13. Test Driven Development
Test Cycle:
red  green  refactor
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14. TDD Cycle
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Write a test that expresses how you’ll
use the code and what you need it to do.

15. TDD Cycle
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Write enough code to get the
test to pass, but no more.

16. TDD Cycle
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Clean up the code to remove
redundancy and improve the design.

17. TDD Cycle
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18. Code Kata: Roman Numerals
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Rules:
• smaller number in front of a larger number  subtraction
• all else  addition
• put only one smaller number in front of a larger number
• ones, tens, hundreds and thousands are separate items
I The numeral one. II is two, III is three.
V The numeral 5. IV is 4, VI is 6, VII is 7, VIII is 8.
X The numeral 10. IX is 9, XI is 11, etc.
L The numeral 50. XL would be 40.
C
The numeral 100. C is short for the Latin word Centum, but Century
is eaysier to remember ;-)
D The numeral 500.
M The numeral 1000.

19. So Long, and Thanks for All the Fish
Any Qs?
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