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<!--[if gt IE 8]<!--><html class="no-js" lang="en"><!--<![endif]--><head><meta charset="UTF-8" /><meta content="width=device-width, initial-scale=1" name="viewport" /><meta content="RSpec: Behaviour Driven Development for Ruby" property="og:title" /><meta content="https://rspec.info/" property="og:url" /><meta content="https://rspec.info/images/logo_ogp.png" property="og:image" /><meta content="summary" name="twitter:card" /><meta content="@rspec" name="twitter:site" /><title>RSpec: Behaviour Driven Development for Ruby</title><link href="/stylesheets/pages/index.css" rel="stylesheet" type="text/css" /><link href="https://fonts.googleapis.com/css?family=Montserrat:400,700" rel="stylesheet" type="text/css" /><link href="https://fonts.googleapis.com/css?family=Source+Sans+Pro" rel="stylesheet" type="text/css" /><link href="https://fonts.googleapis.com/css?family=Inconsolata" rel="stylesheet" type="text/css" /><link href="/blog/feed.xml" rel="alternate" type="application/atom+xml" /></head><body class="index"><header><nav><h1><img alt="Logo" src="/images/logo.png" /><a href="/">RSpec</a></h1><input class="hamburger-toggle" type="checkbox" /><div class="hamburger-icon"><div class="bar"></div><div class="bar"></div><div class="bar"></div></div><ul class="menu"><li><a href="/about">About</a></li><li><a href="/documentation">Documentation</a></li><li><a href="/blog">Blog</a></li><li><a href="/upgrading-from-rspec-2">Upgrade</a></li><li><a href="/help">Get Help</a></li><li><a href="/contributing">Contributing</a></li></ul></nav></header><section class="hero"><article class="hero-text"><img alt="RSpec Logo" src="/images/logo.png" /><div>Behaviour Driven<br />Development for Ruby.</div><div>Making TDD Productive and Fun.</div></article></section><section class="get-started"><article class="steps"><h2>Let's get started!</h2><p>To kick things off, install RSpec and run <code>rspec --init</code> to
set up your project to use RSpec.</p><div class="asciinema-video">
  <asciinema-player src="/casts/14095.cast" speed="3" data-size="small" id="asciicast-14095" poster="data:application/json;base64,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
"/>
</div>
<p>Start with a very simple example that expresses some basic desired
behaviour.</p><div class="asciinema-video">
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<p>Run the example and watch it fail.</p><div class="asciinema-video">
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</div>
<p>Implement that basic behaviour...</p><div class="asciinema-video">
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<p>Run the example and bask in the joy that is green.</p><div class="asciinema-video">
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<h3>Take very small steps</h3><p>Don’t rush ahead with more code. Instead, add another example and let
it guide you to what you have to do next. And don’t forget to take time
to refactor your code before it gets messy. You should keep your code
clean at every step of the way.</p></article><article class="docs"><a class="btn" href="/documentation">View Documentation</a></article><article class="book"><img alt="Effective Testing with RSpec 3" class="needs-border" src="/images/rspec3_book.jpg" /><div><h2>The Book</h2><h3>Effective Testing with RSpec 3: Build Ruby Apps with Confidence</h3><p>This definitive guide from RSpec’s lead developer shows you how to use RSpec to drive more maintainable designs, specify and document expected behavior, and prevent regressions during refactoring. Build a project using RSpec to design, describe, and test the behavior of your code-whether you’re new to testing tools or an experienced developer.</p><a target="_blank" href="https://pragprog.com/book/rspec3/effective-testing-with-rspec-3">New book now available!</a></div></article><p></p><article class="screencast"><img alt="Testing Ruby Application with RSpec Screencast" src="/images/rspec_screencast.png" /><div><h2>The Screencast</h2><p>The Testing Ruby Applications with RSpec screencast introduces the core RSpec libraries through the development of a small CLI card game. In addition to covering the technical aspects of using RSpec, it also covers best practices for using them so you get the most out of your test suite: different types of tests, what kinds of things to test, when different styles are appropriate.</p><a target="_blank" href="https://www.pluralsight.com/courses/rspec-ruby-application-testing">Check out the screencast</a></div></article></section><footer><div>Created with the assistance of Ninefold<img alt="Brutus" src="/images/brutus-half.png" /></div><br /><a href="https://dnsimple.link/resolving-rspec" target="_blank">Resolving with<br /><img alt="DNSimple" style="width:100px;" src="https://cdn.dnsimple.com/assets/resolving-with-us/logo-dark.png" /></a></footer><script>
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