we don't properly encode/decode matchers values to utf-8

[Chris Gagnon]

Description:
we don't properly encode values in autopilot/matchers

we should check the type of new_value or expected_value in autopilot/introspection/dbus.py's wait_for function and encode/decode to utf8 based on type (ie you can't encode string "阿布从" for example)

example of failing test from https://bazaar.launchpad.net/~brandontschaefer/unity/lp.1203106-fix/view/head:/tests/autopilot/unity/tests/test_ibus.py:

======================================================================
ERROR: unity.tests.test_ibus.IBusTestsPinyin.test_pinyin(hud,basic)
----------------------------------------------------------------------
_StringException: traceback-1: {{{
Traceback (most recent call last):
  File "/home/marco/Dev/unity/trunk/tests/autopilot/unity/tests/test_ibus.py", line 240, in test_pinyin
    self.do_ibus_test()
  File "/home/marco/Dev/unity/trunk/tests/autopilot/unity/tests/test_ibus.py", line 215, in do_ibus_test
    self.assertThat(widget.search_string, Eventually(Equals(result)))
  File "/usr/lib/python2.7/dist-packages/testtools/testcase.py", line 406, in assertThat
    mismatch = matcher.match(matchee)
  File "/usr/lib/python2.7/dist-packages/autopilot/matchers/__init__.py", line 111, in match
    return Mismatch(str(e))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 77-79: ordinal not in range(128)
}}}

[PS Jenkins bot (ps-jenkins)]

Fix committed into lp:autopilot at revision 305, scheduled for release in autopilot, milestone 1.3.2

[Launchpad Janitor (janitor)]

This bug was fixed in the package autopilot - 1.3.1+13.10.20130808-0ubuntu1

---------------
autopilot (1.3.1+13.10.20130808-0ubuntu1) saucy; urgency=low

  [ chris.gagnon ]
  * convert strings in dbus introspection waitfor function to unicode,
    use unicode(e) when returning a mismatch instead of str(e). (LP:
    #1207116)

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 305
 -- Ubuntu daily release <email address hidden> Thu, 08 Aug 2013 00:01:11 +0000