acrogenesis-lab / tdd101

#TDD101

Table of contents

1. Introduction
2. String Calculator Kata

#Introduction to TDD

What is TDD?

TDD stands for Test-Driven Development. It's a technique for building software that guides software development by writing tests. It was created by Kent Beck as part of Extreme Programming.

It is a rapid cycle of testing, coding, and refactoring, also known as "Red/Green/Refactor". The developer first writes an automated test case which defines a desired function (Failing/Red Test), then produces the minimum code to pass the test (), and finally refactors the code to an acceptable standard

In TDD, the tests are written from the perspective of a class's public interface. They focus on the class' behavior, not its implementation.

RSpec Basics

RSpec is a tool for writing human readable specifications (tests).

Getting Started

Run gem install rspec.

rspec --init will init rspec in your current directory

Describing the class 'Example'

	
	require 'spec_helper'
	require 'example'

	describe Example do
		describe "#my_instance_method" do
			it "returns a string" do
				expect(example.my_instance_method).to eql "I am an instance method"
			end
		end
	end

Sources:

• http://www.jamesshore.com/Agile-Book/test_driven_development.html
• http://martinfowler.com/bliki/TestDrivenDevelopment.html
• http://betterspecs.org/
• http://www.extremeprogramming.org/rules/testfirst.html
• https://github.com/hackerschoolmty/TDD101/blob/master/class01/README.md