Agile Continuous Improvement Lunch & Learn

Adventures in SpecFlow

BDD in Data Hub Configuration

(a.k.a. SEC)

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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

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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