TDD for the Masses

Jorge D. Ortiz-Fuentes @jdortiz

#TDD4Masses

A Canonical Examples production

#TDD4Masses

Legal disclaimer

– YOU

“I know how to write unit tests”

– YOU

“My name is ____ and I don't always write tests for my code”

Tests are for the modelNo

#TDD4Masses

Agenda

TDD

Unit testing a Table View Controller from scratch

Get it to run

Win or Fail!

MVP intro

MVP

ViewPresenterModel

display orders

events

fetch/changedata

3min TDD Crash Course

Do you test FIRST?

#TDD4Masses

FIRST

Fast

Isolated

Repeatable

Self-verifiable

Timely

Do you test FIRST?

#TDD4Masses

TDD Dance

Red

Green

Refactor

Write test ❌

Write simplest code to pass test ✅

Improve code 👷

Choose next functionality 🤔

Loop until done 🔄

#TDD4Masses

Simplest Code

Hard coded

Closer to the beginning of scope

Less indented

ShorterCredit Ray Osherove

Demo

#TDD4Masses

RecapRed, Green, and Refactor

Add min amount of code to pass

TDD is not only possible, but useful&cool!

Great coverage

Views can be tested

Good architecture helps

http://bit.ly/TDD-CmdU

Thank you!

@jdortiz #TDD4Masses