HowTo: test private methods in Ruby [ruby, test]

test_private_method.rb

# HowTo: test private methods in Ruby
# 
# @author Nelo Onyiah

require "rubygems"
require "shoulda"

module Baz
  private
    def quux
      "Hello, World!"
    end
end

class Foo
  private
    def bar
      42
    end
end

class TestFoo < Test::Unit::TestCase
  include Baz
  public  :quux
  context "A new Foo" do
    setup do
      @foo = Foo.new
    end
    should "have bar == 42" do
      assert_equal 42, @foo.send( :bar )
    end
    should "have quux == 'Hello, World!'" do
      assert_equal "Hello, World!", quux
    end
  end
end

See this thread on stackoverflow for details