zentest snippets

How to use RSpec and ZenTest in a standalone Ruby project

Tagged rspec, autotest, zentest, standalone, ruby  Languages ruby

First install the RSpec and ZenTest gem:

$ sudo gem install rspec zentest

Next create the spec folder:

$ cd project_folder
$ mkdir spec

Save the following to spec/helper.rb:

$LOAD_PATH.unshift File.dirname(__FILE__) + '/..'

require 'rubygems'
require 'spec'
#require 'spec/rake/spectask' not needed, because ZenTest supports rspec now

Now create spec/transcoder_spec.rb, and add the following test to it:

require File.dirname(__FILE__) + '/helper'
require File.dirname(__FILE__) + '/../transcoder.rb'

context "Transcoder" do
  setup do
    # Setup your stuff here
  it "should support 3gp format" do
    Transcoder.convert("me_and_you.3gp").should == true

Let's not forget the class we're testing, put this code in lib/transcoder.rb:

class Transcoder
  def initialize
  def self.convert(file)
    return true

Note that autotest automatically looks for your code in the lib folder.

Now run the test with the zentest command:


Change your files and autotest will run the test again.

Tip: Read Getting started with Autotest - Continuous Testing and Setting up autotest to use Growl on OSX for more information on how to increase your productivity.

Test functionality in isolation with Autospec

Tagged autotest, testing, bdd, tdd, autospec, zentest  Languages ruby

This configuration will make autospec run "spec/models/xyz_spec" when a file in "lib/xyz/ is modified". No other tests are run.

Put the following code in ./.autotest:

Autotest.add_hook :initialize do |at|
  %w{.svn .hg .git vendor}.each {|exception| at.add_exception(exception)}

  at.add_mapping(%r%^lib/xyz/.*\.rb$%) {
    at.files_matching %r%^spec/models/xyz_spec\.rb$%
# Uncomment if more tests are needed...
# +   at.files_matching %r%^spec/models/xyz_spec\.rb$%