Beyond TDD: Enabling Your Team to Continuously Deliver Software

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Beyond TDD
Enabling Your Team to Continuously Deliver Software

Me
• Fightin’ Texas Aggie

• .Net and PHP Developer

• UNIX and Windows Sysadmin

• Senior Consultant at

Impr...

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• @neraath

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• @neraath

• #adn12

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• #adn12

• #tdd

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• @neraath

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• #thisguyisawesome

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• #thisguyisawesome

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• @neraath

• #adn12

• #tdd

• #thisguyisawesome

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• #terrbilepresenter

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• @neraath

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is hiring!

Overview
• No code or demonstrations
• TDD in your current environment
• Continuous Integration
• Continuous Deliv...

Agile

in g
B e Agile

“Working software is
the primary measure of
progress”

Tests

Unit

Load

UI?

Performance

Unit

Unit
Testing

Unit
Testing

Unit leads to
Testing

Unit leads to
TDD
Testing

Unit leads to
TDD
Testing

Challenges Getting Past
TDD

Who/What Broke My
Build?

Integration

Integration
You Don’t See the Forest thru the Trees

Code Quality

Coding Standards

using System;

namespace BeyondTDD
{
public class StringUtils
{
/// <summary>
/// Strips double quotes f...

using System;

namespace BeyondTDD
{
public class StringUtils
{

/// <summary>
/// Strips double ...

using System;

namespace BeyondTDD {
public class StringUtils
{

/*** I had to change this method cause I'm a n00b.
pub...

I will hunt you down and shoot you like a duck dog.

Security

srsly?
what hacker
wears a tie?

Creating and Deploying
a Releasable Package

The Feedback Loop is
Wide Open

How to Improve?

Continuous Integration

CI is a Practice

CI is a Practice

• Integrate now, and frequently, rather than
at the end of development
• Smaller surface area fo...

Martin Fowler

Practical CI
involves Tools

What do you need?
Build Server Accessible by
Source Control
...

What do you need?
• Automate your build
• Manual steps increases risk of failure
• Make your build self-testing
...

What does it do?

What does it do?

Runs Tests

What does it do?

Runs Tests

What does it do?
Generates
Runs Tests
Documentation

What does it do?
Generates
Runs Tests
Documentation

What does it do?
Generates
Runs Tests Quality Analysis
Documentation

What does it do?
Generates
Runs Tests Quality Analysis
Documentation

What does it do?

What does it do?

What does it do?
Integrates
projects

What does it do?
Integrates
projects

Project Status
is Visible
...

What does it do?
Integrates
projects

Project Status
is Visible
...

“Fail Fast”

“Fail Fast”
This Closes our Feedback Loop

“Fail Fast”
• Every commit (to the trunk) should be
built
• Keep the build fast
• Notify (and make visible to) t...

Word to the Wise: Don’t Break the Build!

Other CI
Considerations
• Repeatable & reliable
• Should be able to run the same build
process locally
• ...

If it’s difﬁcult or painful,

do it more often.

Continuous Delivery

Continuous Delivery is
developing in such a way that
software is always ready for
release.

More on Being Agile

More on Being Agile

More on Being Agile

“Our highest priority is to satisfy the customer through
early and continuous delivery of valuable ...

More on Being Agile

“Our highest priority is to satisfy the customer through
early and continuous delivery of valuable ...

Users Drive Your Value
Much like beauty, value is
in the eyes of the beholder.

Get In Front of Users
Sooner

The “Last Mile” Problem

“The further apart your releases are, the more risk you
introduce that the changes are wr...

Strategies

Minimum Viable Product

Do the minimum
amount of work
necessary

Get in front of users
immediately

Usage Patterns

Measure Conversion /
Behavior Expectations

Why?

• We want constant feedback
• How else do we know what we’re doing
is valuable?
• Constant testing...

What about Large
Features?

Incomplete Features

Incomplete Features

• Sometimes a feature is just too big

Incomplete Features

• Sometimes a feature is just too big
• Incomplete features across releases

Incomplete Features

• Sometimes a feature is just too big
• Incomplete features across releases
• Ship it anywa...

Incomplete Features

• Sometimes a feature is just too big
• Incomplete features across releases
• Ship it anywa...

Incomplete Features

• Sometimes a feature is just too big
• Incomplete features across releases
• Ship it anywa...

Feature Toggles

Feature Toggles

Feature Toggles

Feature Toggles

Feature Toggles

Clear the Delivery Path
• MVP helps to make the team think about going to
production as soon as possible

• Deal w...

Everybody has
responsibility for the
release process

DBAs UX QA

Everybody has
responsibility for the
release process
Operations ...

Everyone’s
Responsibilities

• How do I automate the testing and
validation after deploying?
• How do I mak...

Developer
Responsibilities

• How do I keep my software releasable?
• What does it take to deploy my software?

DBA Responsibilities

• How do I automate schema deployments?
• How do I give the build server autonomy
to deploy?

Ops Responsibilities

• How do I want the software to be
deployed?
• How do I give the build server autonomy
t...

Tester Responsibilities

• Did the automated deployment succeed?
• This is not the same as testing software.

Deploy

Deploy

• Use the same mechanism for every
environment
• Should be simple
• For products, use the same mechanism...

Deployment for SaaS

• FTP/SCP
• PowerShell
• Shell Scripting
• MSBuild
• MSI/Installer Packages

Deployment for
Products

• Windows Installers
• Built-in, InstallShield, Wise,VISE, etc.
• Installer (...

Deployment Quality
• Important to establish trust
• End-to-end functional tests become more
valuable
• Behav...

Deploy

• When you’ve deployed, have automated
smoke tests validate a successful
deployment
• If something’s w...

If it’s difﬁcult or painful,

do it more often.

Is it worth it?
• By removing barriers, rehearsing, and
continuously improving the release
process, the risk of ...

Is it worth it?

• Feedback determines the viability of your
feature
• Increases conﬁdence when it’s right
...

Moving Forward
• Identify a single task
• Something that is particularly time
consuming and/or painful
• ...

Moving Forward
• You need to talk to the business

• Ask these questions:

• Would you like to set the release s...

Moving Forward

• Need help?
• After the talk, or after hours party
• askanagilist@improvingenterprises.com

Questions?

Thanks!

spkr8.com/neraath

References

• http://www.informit.com/articles/article.aspx?p=1829417

• http://www.informit.com/articles/article.aspx...

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