Test-Driven Sitecore

@DanSolovaySitecore Practice Lead at VelirMVP x 3

dansolovay.comvelir.com/blog

What’s the plan?1. Unit Testing and Test-Driven Development2. Isolating dependencies3. Isolating Sitecore4. Testing Sitecore itself5. How to get started

1. Unit Testing and Test-Driven Development

What is a Unit Test?

• Can be automated• In memory

(no DB or File access)• Consistent & Fast• Single Logical Concept

Unit Testing is a Waste of Time

…unless you plan to make changes to your code.

Unit Tests Let You…• Change code with confidence• Refactor• Keep code simple• Work well with others

Test-Driven Development

• RED: Make a failing test.• GREEN: Make it pass.• REFACTOR: Make it clean.

This is stupid!"It's going to slow me down, it's a waste of time and effort, it will just break my flow." 

However…Imagine if you walked into a room full of people working this way. A minute ago, all of their code worked.

Robert Martin, The Three Rules of TDDbit.ly/tdd3rules

Calculator KataA classic exercise to learn TDD bit.ly/tdd-kata

Recap• Code is always working• RED: Add functionality• GREEN: Add design• Practice, practice, practice

2. Isolating Dependencies

IsolationHow do I keep out the real world?• Talk to interfaces• Wire with AutoFac• Fake with NSubstitute

AutoFac• Constructor injection• Interfaces Classes• Code to abstractions

NSubstitute• Create fakes from interfaces• Script output• Verify input

Recap• MVC + AutoFac:

Interfaces Production Objects• NSubstitute:

Interfaces Fakes

3. Isolating Sitecore

Sitecore and TestabilitySitecore items are FAT objects

• Knowledge of database• Hard to “new up”• God-like Static methods

Glass Mapper• Injects items into light objects• Plays well with AutoFac & MVC• Code Gen option

Documentation: http://glass.lu

Sitecore.FakeDB• Creates fake Items• Can fake:

• Hierarchies• Templates• Security

• Still in Development

Github: bit.ly/FakeDB

Recap• Glass for isolating Sitecore• Sitecore.FakeDB for legacy code

4. Testing Sitecore Itself

Codeflood Test Runner• Available at

CodeFlood.net• Useful for testing

Sitecore behavior

Recap• Integration tests talk to real things• Use for testing Sitecore tools• Use unit tests to build logic

5. How to Get Started

Some Practical Tips• Start small. One hour a week.• Pair up.• Keep tests clean.• Keep tests passing. • Do a Kata workshop. • Do TDD Ping Pong.

NSubstituteReSharperNCrunchXUnit?

To Learn More• My talk videos: bit.ly/tdd-videos• String Calculator: bit.ly/tdd-kata• Alistair Deneys’ blog: bit.ly/sitecore-testing

Photo CreditsClock:

© littlenelly, FlickrTraffic Light:

© Niels Sienaert, FlickrLighthouse:

© Dennis Jarvis, FlickrScrewdriver:

© Gal, FlickrDan:

© Chris Brady, Velir

Thanks…

@DanSolovay@Velir