Driving Behaviour
with
Cucumber
Zach Dennis
Mutually Human Software
www.mutuallyhuman.com
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later...
...still joyful
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a framework for writing and
executing high level descriptions
of your software’s behavior
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Cucumber
is not a low level
testing/specification
framework.
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Cucumber is a
BDD tool
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BDD was reframing of TDD
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It has evolved into its own
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Dan North’s
3 Principles of BDD
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1. Enough is enough
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2. Deliver stakeholder value
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3. It’s all behaviour
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how
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I want ...
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ok, why?
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In order to reduce time managing contacts
users should be able to
search for contacts within their account
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In order to reduce time managing contacts
users should be able to
search for contacts within their account
value
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In order to reduce time managing contacts
users should be able to
search for contacts within their account
role
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In order to reduce time managing contacts
users should be able to
search for contacts within their account
behaviour
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In order to reduce time managing contacts
users should be able to
search for contacts within their account
searching contacts
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searching contacts details
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searching contacts details
Searching by name
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searching contacts details
Searching by name
Searching by partial name
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searching contacts details
Searching by name
Searching by partial name
Searching for non-existent person
...
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searching contacts details
Searching by partial name
Given John Smith exists
And I’ve logged in as a user
When I search for Jo
Then I should see John Smith is found
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Organizing
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Project Management
Tools
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Code
Stories Acceptance Criteria
Today
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Code
Stories Acceptance Criteria
Near Distant Future
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Code
Stories Acceptance Criteria Future
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Stories Acceptance Criteria
Code
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identify the behaviour first
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everything else
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Outside-In
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UX/IA/IxD
Views
Controllers
Models
Database
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UX, IA, IxD
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Views
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Controller
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Models
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Database
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An Example
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In order to reduce time managing contacts
users should be able to
search for contacts within their account
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searching contacts details
Searching by partial name
Given John Smith exists
And I’ve logged in as a user
When I search for Jo
Then I should see John Smith is found