build quality in: stop the line - peter antman

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How to build quality in – a tale from the trenches Peter Antman 2013-05-23

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Peter Antman's (@peterantman) presentation from MeetUI 2013, SoapUI's first user conference, in Stockholm, Sweden. Peter is

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Page 1: Build Quality In: Stop the Line - Peter Antman

How to build quality in – a tale from the trenches

Peter Antman 2013-05-23

Page 2: Build Quality In: Stop the Line - Peter Antman

Who am I?

Peter Antman 2

Background… §  Developer since 1995 §  Linux, Open Source and

Enterprise Java §  Leader and manager for

software developer since 2000

§  Head of Product Development, Polopoly Atex 2007 - 2011

§  Media business §  Drive: Help organizations and

people fully realize their potential (doing software development)

Peter Antman 0760 140 150 [email protected] @peterantman www.crisp.se/konsulter/peter.antman blog.crisp.se/peterantman, antman.se

Page 3: Build Quality In: Stop the Line - Peter Antman

Crisp is an employee owned company known for agile courses with internationally renowned teachers and experienced agile

developers and coaches.

h"p://blog.crisp.se  

Persistent improvements

Page 4: Build Quality In: Stop the Line - Peter Antman

§  Polopoly – Enterprise WebCMS

§  International take of 2008

§  Started Agile transformation 2007

§  Existed for 16 year

§  Large code base

§  Large user base

§  Thousands of editors, millions of users, billions of page views

Development Manager @ Polopoly

Peter Antman 4

Page 5: Build Quality In: Stop the Line - Peter Antman

Organized around lean principles

Page 6: Build Quality In: Stop the Line - Peter Antman

Cult of quality

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http://commons.wikimedia.org/wiki/File:1924_Non-Stop_Shuttle_Change_Toyoda_Automatic_Loom,_Type_G_2.jpg

The Type-G Toyoda Automatic Loom, the world's first automatic loom with a non-stop shuttle-change motion, was invented by Sakichi Toyoda in 1924. This loom automatically stopped when

it detected a problem such as thread breakage.

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Time Boxed releases

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No junk on trunk �

9

REL

Team

Demoed

Team test branch (convinience)

Story branch

Allways releaseable!

Test everything!

Page 10: Build Quality In: Stop the Line - Peter Antman

http://www.makefive.com/categories/news-business/business/top-5-items-i-sold-on-ebay

Continous integration

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§  1.5 million lines of code §  10 000 tests §  PEAR §  PAF §  Upgrade, and more configurations §  Five database vendors * multiple versions §  Four browsers * multiple versions §  Three web containers * multiple versions §  Two JDK:s * multiple versions §  Two core OS:es * multiple versions §  Two EJB containers * multiple versions

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Plattform to validate

Linux Windows  

Mysql   Oracle   Msql   Postgres   Derby  

Sun JDK IBM JDK

Tomcat JBossWeb WS Web

JBoss Websphere

Chrome Firefox Safari IE

1.5  million  

10  000  tests  

Multiple configurations

Multiple versions

Page 13: Build Quality In: Stop the Line - Peter Antman

That’s a lot of tests

Page 14: Build Quality In: Stop the Line - Peter Antman

Had to build our own test cloud

§  Started with RedHat kickstart on old machines under our tables –  Fragile, hard to upgrade, electricity out takes

§  Went to static installs on blades –  Lots of sys admin. One machine = one setup

§  Tried VMWare –  Clock issues (went backwards)

§  Started using Amazon –  To slow to upload our builds

§  Static Xen on local blades –  One machine = one setup

§  Eucalytus (kvm) on local blades, elastic cloud –  Very buggy (more than 6 month to stabilize)

History�

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596 570 For example when merging a bugfix to 9.10

Page 16: Build Quality In: Stop the Line - Peter Antman

Number of tests (november 2011)

Page 17: Build Quality In: Stop the Line - Peter Antman
Page 18: Build Quality In: Stop the Line - Peter Antman

Our version of the automatic loom

Page 19: Build Quality In: Stop the Line - Peter Antman

http://geekandpoke.typepad.com/.a/6a00d8341d3df553ef014e8adc7838970d-pi

Page 20: Build Quality In: Stop the Line - Peter Antman

Compile class

Test class

Compile module

Test module

Build product

Test product

Acceptance test product

Test on specific plattform

Test with specific configuration

At what stage is it possible to continue working even if

it’s broken?

Incremental compile

Software development

Page 21: Build Quality In: Stop the Line - Peter Antman

http://fixedgear.se/forum/viewtopic.php?f=1&t=2650&start=20

Urban decay

Page 22: Build Quality In: Stop the Line - Peter Antman

http://www.codinghorror.com/blog/2005/06/the-broken-window-theory.html

Broken Windows

A sociological theory from 1982

Page 23: Build Quality In: Stop the Line - Peter Antman

http://huntington.patch.com/articles/volunteers-clean-up-in-the-station#photo-5852615

The New York Theorem:

Fighting big crime by picking litter

Page 24: Build Quality In: Stop the Line - Peter Antman

http://www.makefive.com/categories/news-business/business/top-5-items-i-sold-on-ebay

Broken builds are broken windows

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The line must be stoped manually

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Tools

Culture

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§  Everything must be tested

§  Examine each failed test, always

§  New bugs are, –  either fixed when standing on them

–  handled as a ”fix next sprint” (first in line)

–  put into drawer

Stop the line and fix it

Page 28: Build Quality In: Stop the Line - Peter Antman

§  Bugs discovered by non automated tests are fixed in next sprint

§  Philosophy: We strive not to produce software with errors

§  Policy: If it had been covered by a test it would have been fixed immediately

§  Practically: Old bugs tends to never get fixed (adapt to capacity)

FixNextSprint – never let a windows be broken

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§  Integrate –  first on ticket branch, –  then team test branch, –  then team branch, –  then branch

§  Hide known bugs (KnownBugs) §  Run only when changed (600 000 -> 100 000) §  Nightly test check responsibility (rotate between teams) §  Daily summary mail on test faults §  Tickets for test faults §  Indexed in Solr §  Annotate in Jenkins

Tools and policies are necesary

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Analyzing Test Faults

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Clean up GoGreen (adapt to capacity)

FixNextSprint (Stop-the-line)

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It’s a never ending work

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Here’s a song to sing

I keep a close watch on these tests of mine

I keep my Jenkins open all the time

I see a defect coming down the line

Becuse you're mine, I stop the line