THAT WORKED BEFOREJUnit Testing and TDD in XPages

Christan Güdemann

WebGate Consulting AG / OpenNTF

www.webgate.biz / www.openntf.org

christian.guedemann@webgate.biz

@guedeWebGate

FRIDAY, 15.07

Only this short change and the customer is happy!

ON MONDAY…. 11:22

Outch! Nothing works!

PLEASE TEST!

Users View

Is the UI functional

Are all data validated

If I click a will happen b

Developers View

Is my code doing what I

excpect?

Are errors handled correct

Is all my code tested

TEST FIRST?

The TDD Mantra

Write a test

Make the test compile

The test must fail

Fix the code as fast as possible

Remove duplications

(http://de.wikipedia.org/wiki/Testgetriebene_Entwicklung)

TDD – WRITE A TEST

A Test document what I expect from a piece of code

int amountCHF = bank.changeEuro2CHF( 100 );

assertEquals( 120, amountCHF)

PS: This test is done by the Swiss Federal bank each day

I CAN DO THIS WITH XPAGES?

• YES – thanks to OpenNTF;)

• Download org.openntf.junit.xsp and install it on server and designer

http://openntf.org/main.nsf/project.xsp?r=project/org.openntf.junit.xsp

DEMO

GOT YOUR POINT BUT HOW TO CONVINCE MY TEAM?

• Writing tests is waste of time we do not have

• That we have never done before

• And there is another website that documents TDD bullshit.

TIME FOR AN EXPERIMENT

• WebGate Consulting hat the project “goodmeeting.biz” driven according the TDD rules

• In the middle of the first iteration we had to refactor a major part– DONE in 60 Minuten – No errors!

WHY I LOVE TDD

• I’m definitely relaxed because the code does what I expect that the code should do

AND TDD HELP YOU ALSO IN THIS TOPICS!

• Explore how a new API works? – Write some tests

• Each new version can be tested against your tests

• Understand what your co workers want to do? – Read the tests

LITERATUR

• Test Driven Development by Example (Kent Beck)

http://www.amazon.de/Driven-Development-Example-Addison-Wesley-Signature/dp/0321146530/ref=sr_1_1?ie=UTF8&qid=1415217300&sr=8-1&keywords=tdd+by+example