From: Alex Young <alex@...>
Date: 2007-09-05T18:24:18+09:00
Subject: Re: Embedded vs. Non-embedded Tests

Stefan Rusterholz wrote:
> Peter Cooper wrote:
>> And if you get onto, say, Formula 1 cars.. some "repairs" can even take
>> place on the road and the telemetry provides almost as much info to the
>> engineers while the car is running out on the track as they can get in 
>> the
>> garage. I've always wondered if/how to make software as easy to diagnose
>> with real-time telemetry and the ability to make changes to a running
>> program's parameters..
> 
> Take a look at Eiffels Design By Contract. I'm a huge fan of it. Allows 
> you to move most testing code into the contract, the unit tests are then 
> merely running your code with contracts enabled.
> For an idea on how that works, take a look at the movies with "Design by 
> Contract" in the title here: http://eiffel.com/developers/presentations/
> Would be a very nice feature if ruby had that, even though I'd introduce 
> additional syntax and I've no idea how to integrate it nicely.
Allow me to shamelessly copy and paste from an old post of mine:

$ cat testable.rb
module Test; module Unit; class TestCase; end; end; end

module Testable
   def test_case(&block)
     Class.new(Test::Unit::TestCase).module_eval &block
   end
end

$ cat builtin_tests.rb
require 'testable'

class MyWorkingClass
   extend Testable

   def foo(a,b)
     return a+b
   end

   test_case {
     def test_foo_null
       assert_equal 2, MyWorkingClass.new.foo(1,1)
     end
   }
end

if __FILE__ == $0
   puts MyWorkingClass.new.foo(1,1)
end

$ ruby builtin_tests.rb
2
$ testrb builtin_tests.rb
Loaded suite builtin_tests.rb
Started
.
Finished in 0.00095 seconds.

1 tests, 1 assertions, 0 failures, 0 errors
$


Something like that?

-- 
Alex