Testing in AgileAri Tanninen

Agile Dinner HelsinkiDecember 1st 2009

Wednesday, December 2, 2009

AgendaIntroductionsMotivation

Wednesday, December 2, 2009

Assumptions

• Understanding of software development

• Familiarity of agile

• Basic testing know-how

Wednesday, December 2, 2009

My Biases

• Java developer

• Object-orientation

• Consulting

Wednesday, December 2, 2009

Everything About Testing

Wednesday, December 2, 2009

Functional testing...

• Black box

• White box

• Grey box

• Regression

• Smoke

• User

Wednesday, December 2, 2009

Levels of testing...

• Unit

• Module

• Component

• Integration

• System

• System integration

Wednesday, December 2, 2009

More testing!

• Performance, scalability, stability, stress

• Destructive

• Usability

• Security

• Exploratory

• Monkey

Wednesday, December 2, 2009

Wednesday, December 2, 2009

Back to Basics

Wednesday, December 2, 2009

Purposes of Testing

• Product validation (the right product?)

• Support development (built right?)

• User / Technology

• System / Code

Wednesday, December 2, 2009

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Wednesday, December 2, 2009

Agile Needs from Testing

Wednesday, December 2, 2009

Waterfall

Analysis Design Coding Testing DeployingPlanning Done!

Risk analysisTest planning

Test case design

Wednesday, December 2, 2009

Agile

Analysis Design Coding Testing DeployingPlanning

Analysis Design Coding Testing DeployingPlanning

Analysis Design Coding Testing DeployingPlanning

Analysis Design Coding Testing DeployingPlanning

Done!

Done!

Done!

Done!

Risk analysisTest planning

Test case design

Risk analysisTest planning

Test case design

Risk analysisTest planning

Test case design

Definition of done: tested

Wednesday, December 2, 2009

Potentially shippable functionality at the end

of every iteration?

Wednesday, December 2, 2009

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Wednesday, December 2, 2009

The Problem

1 2 3 4

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Iteration

Wednesday, December 2, 2009

Test Automation

Wednesday, December 2, 2009

Automated test case execution!

Automated testing?

Who designs and automates the test cases?

Wednesday, December 2, 2009

Agile Development

Iterative andincrementaldevelopment

Up-frontdesign

impossible

Featuresadded,

changed,removed

Design mustevolve

Changingcodebase

RefactoringRegression

testingTest

automation

Test-firstdevelopment

Tests, too!

Wednesday, December 2, 2009

The Key to Test Automation

Software development

Testing tools?

http://stopandfix.blogspot.com/2009/03/key-to-test-automation.html

Wednesday, December 2, 2009

Tests are software, too

• Evolution

• Architecture & design

• Iterative & incremental development

• Readability (➙DSL)

Wednesday, December 2, 2009

Why test-first?

• Efficient, least boring way to regression

• Minimalism (“do only what is needed”)

• “Done”

• Design

• Collaboration

Wednesday, December 2, 2009

Unit Test Driven Development

Acceptance Test Driven Development

Wednesday, December 2, 2009

Challenges to Testing

• Changing spec, code, and tests

• “Potentially shippable” after every iteration

• Usability & property testing

• Tester’s role

Wednesday, December 2, 2009

Tester’s Role Redefined

• Acceptance tests, user view of system

• Business value focus, PO liaison

• Exploratory testing & the difficult stuff

• Thinking, contributing team member

• Learn programming, train developers

Wednesday, December 2, 2009

Keys to Agile Testing

• Developer testing

• Evolving testing tools ➙ programming

• Lazy & adaptive mindset

• Collaboration

Wednesday, December 2, 2009

Beer.

Wednesday, December 2, 2009