ABAP Unit and TDD

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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

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ABAP Unit and TDD
Hendrik Neumann
SAP Inside Track Hamburg 2013
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

Agenda
 Unit Testing & ABAP Unit
 Test Driven Development (TDD)
 Live Coding
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

Unit Testing
Unit Testing is a method by which
individual units of source code are tested
to determine if they are fit to use.
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

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.
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

xUnit Framework
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de
setup( )  test_method( )  teardown( )
assert_*( ) – methods

ABAP Unit
SAP‘s xUnit implemenation
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

ABAP Unit
 Local test classes for global dev. artifacts
 In Reports, Function Modules and Classes
 Not acitve on production systems
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

ABAP Unit
 Tools integration:
 ABAP Workbench
 Code Inspector Integration
 ABAP Unit Browser
 ABAP Test Cockpit (ATC)
 ABAP in Eclipse
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

Test Driven Development
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

Test Driven Development
 Never
 After you wrote your code
 Before you write your code
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de
When do you write your Unit Tests?
Test Driven Development

Test Driven Development
Test 1st
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

Test Driven Development
Test Cycle:
red  green  refactor
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

TDD Cycle
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de
Write a test that expresses how you’ll
use the code and what you need it to do.

TDD Cycle
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de
Write enough code to get the
test to pass, but no more.

TDD Cycle
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de
Clean up the code to remove
redundancy and improve the design.

TDD Cycle
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

Code Kata: Roman Numerals
Copyright © 2013 evivax IT Consulting GmbH
Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de
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.

So Long, and Thanks for All the Fish
Any Qs?
Copyright © 2013 evivax IT Consulting
GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

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2. Agenda  Unit Testing & ABAP Unit  Test Driven Development (TDD)  Live Coding Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

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. Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

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. Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

5. xUnit Framework Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de setup( )  test_method( )  teardown( ) assert_*( ) – methods

6. xUnit Framework Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de setup( )  test_method( )  teardown( ) test_method( ) test_method( ) test_method( ) test_method( ) test_method( ) test_method( )

8. ABAP Unit  Local test classes for global dev. artifacts  In Reports, Function Modules and Classes  Not acitve on production systems Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

9. ABAP Unit  Tools integration:  ABAP Workbench  Code Inspector Integration  ABAP Unit Browser  ABAP Test Cockpit (ATC)  ABAP in Eclipse Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de

11. Test Driven Development  Never  After you wrote your code  Before you write your code Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de When do you write your Unit Tests? Test Driven Development

14. TDD Cycle Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de Write a test that expresses how you’ll use the code and what you need it to do.

18. Code Kata: Roman Numerals Copyright © 2013 evivax IT Consulting GmbH Goebelstraße 21 | 64293 Darmstadt | Fon: 06151 - 506420 | e-mail: mail@evivax.de 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.

ABAP Unit and TDD

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