Transcript
Agile Continuous Improvement Lunch & Learn
Adventures in SpecFlow
BDD in Data Hub Configuration
(a.k.a. SEC)
© Copyright 2011 ADP, Inc. Proprietary and Confidential Information2
Agenda - 1 hour
• [10 min] - Introduction to BDD & Executable Specifications
• [05 min] - Overview of .NET BDD Tools
• [05 min] - Introducing SpecFlow
• [20 min] - DEMO / Hands on
• [05 min] - Benefits
• [05 min] - Problems & Pro Tips
• [05 min] - BDD vs. Unit Tests
• [05 min] – Conclusion & further study
© Copyright 2011 ADP, Inc. Proprietary and Confidential Information3
Agenda - 1 hour
*NO FREE PIZZA*
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Introduction to BDD & Executable Specifications
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The Question
What does the Customer want?
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Not (only) about testing
1. User Story Acceptance Criteria
2. Shared understanding about outcomes
3. Removes implicit expectations (assumptions)
4. Reduces friction in the team
5. What does our solution do and not do?
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* Driven Development
“Behavior Driven Development” – Dan North
“Specification by Example”
“Executable Specifications”
“Acceptance Test Driven Development” (ATDD)
“Test Driven Development”
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Overview of .NET BDD Tools
(there are a lot)
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.NET BDD Frameworks & Libraries
SpecFlow – Cucumber for .NET
NSpec
MSpec
TestStack.BDDify
NBehave
“Vanila” NUnit/MSTest/xUnit.net
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Explore what’s out there
Have a play and figure out which is best for your team and organisation
SpecFlow is one of many options
A new awesome framework might be released tomorrow
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Introducing SpecFlow
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DEMO
CODE
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Benefits
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Benefits
Human readable (Gherkin - DSL)
Build Context Incrementally
Specification & Documentation
Early discovery of assumptions in acceptance criteria
Early discovery of technical assumptions
Intermediary (Gherkin) between User Story and Code
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Problems & Pro Tips
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Problems & Pro Tips
SpecFlow comes from Cucumber (Ruby)
Sharing state between Steps
Test organisation & structure
Test naming
Mock or end-to-end?
Maintenance
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BDD and Unit Tests
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BDD and Unit Tests
Do SpecFlow Specs replace unit tests?
SpecFlow more suited for larger End-to-end tests
Unit Tests for Devs, BDDS for SCRUM Team & Stackholders
SpecFlow generates NUnit tests automatically
DEMO
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Conclusion
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Conclusion
Sam’s 3 step guide to success!
1. Capture the User Story Acceptance Criteria as Gherkins
2. Implement SpecFlow Specs and iterate with changes to Gherkins [Acceptance Criteria WILL change]
3. You get detailed and correct acceptance criteria and automated regression tests. Everybody wins.
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Conclusion
Was it worth it?
Is anyone going to read our Gherkin Specs?
The effort (money) needed to create and maintain the Specs needs to taken into account
The Team needs to be agile & adopt Gherkin and “Spec first mentality”
Change in thinking & culture
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Further Study
http://stackoverflow.com/questions/307895/what-is-the-most-mature-bdd-framework-for-net
http://www.specflow.org/resources/
Specification by Example [Gojko Adzic, 2011]
The Cucumber Book [Matt Waynne, 2012]
The Art of Unit Testing [Roy Osherove, 2009]
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Questions?
BE AGILE
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Thank you
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