I have recently coded up an implementation of Doctest for Ruby. Kind of ugly, but it works. DocTest Explanation: Or rather, example: Here are some examples copied from http://clintonforbes.blogspot.com/2007/08/doctest-for-ruby-and-rails.html =begin #doctest Check that 1 + 1 = 2 >> 1 + 1 => 2 >> 2 + 3 => 5 =end And it outputs something like this Looking for doctests in 3 files Processing 'script/../app/helpers/application_helper.rb' Testing 'Check strings'...OK Testing 'Check that 1 + 1 = 2'...OK Testing 'Add some arrays'...OK Testing 'Check that 2 + 2 = 4 and 4 + 4 = 7'...FAILED Code: 4 + 4 Expected: 7 But got: 8 Processing 'script/../app/models/member.rb' Testing 'Test creating a Member'...OK Total tests: 5, Succeeded: 4 You can also add explanations between lines =begin #doctest Check that 1 + 1 = 2 >> 1 + 1 => 2 It should also work for other than 1's >> 2 + 3 => 5 =end You'll note that this is just copied and pasted working output from an irb session. You can add these anywhere in your file. Advantages The advantages of using this is that it creates tests that are somewhat behavior oriented [behavior of a method], and the tests serve as a kind of documentation for the code. And it is dirt easy and fast to create these kind of tests. I like it because I don't have to think as much to do the testing. Installation [it's not yet a real rubygem] Download http://ruby-roger-useful-functions.googlecode.com/svn/trunk/packages/doctest/pkg/doctest-0.0.1.gem run [sudo] gem install doctest-0.0.1.gem Here's the page for any feedback: http://code.google.com/p/ruby-roger-useful-functions/wiki/DocTest -- Posted via http://www.ruby-forum.com/.