I read an excellent post by John Lam, about his talk at TechEd 2008 on IronRuby

In the post he has screen shots of some ironRuby code for at simple unit-testing framework.

I tried looking around to find the code, but could not find it anywhere.

Hence I decided to type it in myself (reminds me of the days when you would get a hold of a C64 magazine and type in some example and three hours later see a baloon flying around your screen ...)

Anyway this is not code I made, this is John Lams work:

$examples = 0
$messages = []

class PositiveExpectation
  def initialize(obj)
    @obj = obj
  end
  def ==(other)
    $examples += 1
    if @obj != other
      $messages << "Want #{@obj.inspect} got #{other.inspect}"
      print "E"
    else
      print "OK"
    end
    end
end

class Object
  def should
    PositiveExpectation.new(self)
  end
end

def it(description)
  print "\n it #{description}: "
  yield
end

def describe(description)
  print "#{description}"
  yield
  puts "\nend\n"
end

at_exit do
  puts "#{$messages.length} / #{$examples} failed"
  if $messages.length > 0
    puts "Failures: "
    $messages.each { |m| puts "- #{m}"}
  end
end