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@sebrose h)p://smartbear.com
Seb Rose
Corrosive expertise
@sebrose h)p://smartbear.com
Agenda
Exper&se
Examples:
•Template
•Acronym
•Metaphor
Corrosive exper&se
Q & A
@sebrose h)p://smartbear.com
Exper+se
Why do we need experts?

Which experts do we trust?

How do we want exper&se delivered?
@sebrose h)p://smartbear.com
As a <role>
I want <goal/desire>
So that <benefit>
Template - Connextra
@sebrose h)p://smartbear.com
Discussion
At you table discuss the user stories
and the Connextra template.
• Why do they exist?
• How are they connected?
Please make notes of any key points.
@sebrose h)p://smartbear.com
Placeholder for a conversa+on
@sebrose h)p://smartbear.com
Feature Injec+on
In order to <get some value>
<role> should be able to
<do something>
@sebrose h)p://smartbear.com
“That’s not a real user story …”
Too technical
Not shippable
Wrong format
@sebrose h)p://smartbear.com
ConfeE party
User stories are
NOT
requirementsUser stories areEPHEMERAL
@sebrose h)p://smartbear.com
This template has
let us forget why
user stories were
invented
@sebrose h)p://smartbear.com
I N V E S T
Acronym
@sebrose h)p://smartbear.com
Independent
Nego+able
Valuable
Es+matable
Small
Testable
I
N
V
E
S
T
Discussion
@sebrose h)p://smartbear.com
Interpreta+on
Independent
Valuable
or
At your tables, define either:
@sebrose h)p://smartbear.com
IndependentI
N
V
E
S
T
@sebrose h)p://smartbear.com
Independent
Dependent
@sebrose h)p://smartbear.com
Valuable
I
N
V
E
S
T
@sebrose h)p://smartbear.com
Minimum marketable feature (MMF)?
What is value?
Potentially shippable increment?
Demonstrable functionality?
How might these interact with
“Small”???
@sebrose h)p://smartbear.com
anything that:
Value is …
- increases knowledge

- decreases risk

- generates useful feedback
@sebrose h)p://smartbear.com
This acronym
leaves plenty of
room for
misinterpretation
@sebrose h)p://smartbear.com
Metaphor
Test Automa&on Pyramid
@sebrose h)p://smartbear.com
Name the layers
E2E tests
UI tests
Integration
tests Unit tests
Programmer
tests
Manual testsComponent
tests
Regression
tests
Smoke tests
@sebrose h)p://smartbear.com
“Official” answer
Test
Automa&on
Pyramid
E2E
Integra&on
Unit
@sebrose h)p://smartbear.com
Goodhart’s law
10%
20%
70%
“When a measure
becomes a target,
it ceases to be a
good measure”
@sebrose h)p://smartbear.com
Misunderstanding
UI
Integra&on
Unit
@sebrose h)p://smartbear.com
Righter?
Smoke
Protocols
Code
@sebrose h)p://smartbear.com
Metaphor - pyramid
Removing the lines
Number of tests
How much of the
applica&on the
test exercises
http://claysnow.co.uk/architectural-alignment-and-test-induced-design-damage-fallacy/
@sebrose h)p://smartbear.com
This metaphor
has caused
countless team
dysfunctions
@sebrose h)p://smartbear.com
Corrosive exper+se
Agile doesn’t work here!
@sebrose h)p://smartbear.com
No silver bullet
Not only are there no silver bullets
now in view, the very nature of
software makes it unlikely that there
will be any.
Frederick P. Brooks
"No Silver Bullet: Essence and Accidents of Software Engineering," 
Computer, Vol. 20, No. 4 (April 1987) pp. 10-19
@sebrose h)p://smartbear.com
Examples revisited
@sebrose h)p://smartbear.com
PaTerns can help us filter
•Name
•Problem
•Context
•Forces
•Solution
•Resulting Context
•Known Uses
•Related Patterns
•http://wiki.c2.com/?CanonicalForm
•Context
•Forces
@sebrose h)p://smartbear.com
Takeaways
Concrete advice
is often
ambiguousAlways consider
your context
Bad outcomes
don’t mean the
advice was bad
Seb Rose


Twitter: @sebrose
Blog: http:/cucumber.io/blog
E-mail: seb@smartbear.com http://bddbooks.com

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Corrosive expertise - Agile2019