From: Guillaume Marcais <guslist@...>
Date: 2004-05-07T23:30:21+09:00
Subject: test unit & singleton

How do you get a fresh copy of a singleton between 2 unit test? It
somewhat breaks the principle of a singleton object as I would like to
get a second brand new instance of the object.

Example (pseudo-code):

require 'singleton'

class MyObject
  include Singleton

  # ... Bunch of good stuff
end

if $0 == __FILE__
  require 'test/unit'

  class MyObject_Test
    def test_functionality_1
      o = MyObject.instance
      # ... Tests on o, which changes the internal state of o ...
    end

    def test_functionality_2
      o = MyObject.instance # This instance is polluted 
                            # by previous tests
      # ... Tests on o
    end
  end
end

How would I get rid of the instance created and polluted in test 1 to
start anew in test 2? Should I implement a 'reset' method to clear all
states in the singleton object?

Guillaume.