From: Farrel Lifson <farrel.lifson@...>
Date: 2006-03-17T20:02:24+09:00
Subject: Re: Q: variable "declarations"

I would suggest unit tests using the Test::Unit API which comes
standard with ruby these days.

C:\>more test.rb
require 'test/unit'

def do_something
  result = 1
 # some code...
 reslt = 2   # a typo here!!!
 result
end

class MyTestCase < Test::Unit::TestCase
  def test_do_something
    assert_equal(2,do_something)
  end
end

C:\>ruby test.rb
Loaded suite test
Started
F
Finished in 0.031 seconds.

  1) Failure:
test_do_something(MyTestCase) [test.rb:12]:
<2> expected but was
<1>.

1 tests, 1 assertions, 1 failures, 0 errors

More info at http://www.ruby-doc.org/stdlib/libdoc/test/unit/rdoc/