(DBI || RUnit || Ruby || My_Understanding).bug?

Hi Rubyers

Is it a bug or not?
If it is then whoose?

The script:
---------------------------------------------------------------------
#!/usr/bin/ruby
require 'dbi'
require 'runit/testcase'
module DBI
  class Date
    def ==(other)
      return @year == other.year && @month == other.month &&
        @day == other.day
    end
  end
end

result = DBI.connect('DBI:Pg:test', 'rumah') {|dbh|
    dbh.select_all "select * from date_test where id=45 order by id"
  }
expected = [[45, DBI::Date.new(2002, 7, 25)]]
p result
p expected
puts(result == expected) # => true
puts(result != expected) # => false


class SQLTest < RUNIT::TestCase
  def setup
    @db = DBI.connect('DBI:Pg:test', 'rumah')
  end
  def tear_down
    @db.disconnect
  end
  def op_test(expr, expected)
    actual = @db.select_all \
      "select * from date_test where #{expr} order by id"
    #actual = [[45, DBI::Date.new(2002, 7, 25)]] # This works

    #assert(expected == actual, expr) # Also fail
    assert_equal(expected, actual, expr)
  end
  def test_one
    expected = [[45, DBI::Date.new(2002, 7, 25)]]
    op_test('id = 45', expected)
  end
end
#--- main program ----
if __FILE__ == $0
  require 'runit/cui/testrunner'
  suite = SQLTest.suite
  RUNIT::CUI::TestRunner.run(suite)
end
---------------------------------------------------------------------

The output on LM 8.1
---------------------------------------------------------------------
[zakaria@hamdalah ruby]$ ruby -v
ruby 1.6.4 (2001-06-04) [i586-linux-gnu]
[zakaria@hamdalah ruby]$ ./sql.rb 
[[45, #<DBI::Date:0x4022c1a0  @day=25, @month=7, @year=2002>]]
[[45, #<DBI::Date:0x4023226c  @day=25, @month=7, @year=2002>]]
true
false

SQLTest#test_one F.
Time: 0.130027
FAILURES!!!
Test Results:
 Run: 1/1(1 asserts) Failures: 1 Errors: 0
Failures: 1
../sql.rb:35:in `op_test'(SQLTest): id = 45 expected:<[[45,
#<DBI::Date:0x40210bf4  @day=25, @month=7, @year=2002>]]> but
was:<[[45, #<DBI::Date:0x4020e444  @day=25, @month=7, @year=2002>]]>
(RUNIT::AssertionFailedError)
	from ./sql.rb:39:in `test_one'
	from ./sql.rb:46

---------------------------------------------------------------------

The output on Cygwin
---------------------------------------------------------------------
$ ruby -v
ruby 1.6.5 (2001-09-19) [i686-cygwin]

$ ./sql.rb
[[45, #<DBI::Date:0xa015c8 @day=25, @month=7, @year=2002>]]
[[45, #<DBI::Date:0xa08930 @day=25, @month=7, @year=2002>]]
true
false

SQLTest#test_one F.
Time: 0.5
FAILURES!!!
Test Results:
 Run: 1/1(1 asserts) Failures: 1 Errors: 0
Failures: 1
../sql.rb:35:in `op_test'(SQLTest): id = 45 expected:<[[45,
#<DBI::Date:0xa00098 @day=25, @month=7, @year=2002>]]> but was:<[[45,
#<DBI::Date:0x9fd458 @day=25, @
month=7, @year=2002>]]> (RUNIT::AssertionFailedError)
        from ./sql.rb:39:in `test_one'
        from ./sql.rb:46
---------------------------------------------------------------------