pyruntest returns 0 when test error

[Martin Mrazik]

How to reproduce:

export DISPLAY=
bzr branch lp:autopilot
cd autopilot/autopilot
pyruntest tests
echo $?

It should return 1.

The actual result is:
[...]
Failed to import test module: tests.test_autopilot_functional
Traceback (most recent call last):
  File "/usr/lib/python2.7/unittest/loader.py", line 252, in _find_tests
    module = self._get_module_from_name(name)
  File "/usr/lib/python2.7/unittest/loader.py", line 230, in _get_module_from_name
    __import__(name)
  File "/tmp/autopilot/autopilot/tests/test_autopilot_functional.py", line 26, in <module>
    from autopilot.testcase import AutopilotTestCase
  File "/usr/lib/python2.7/dist-packages/autopilot/testcase.py", line 44, in <module>
    from autopilot.keybindings import KeybindingsHelper
  File "/usr/lib/python2.7/dist-packages/autopilot/keybindings.py", line 228, in <module>
    class KeybindingsHelper(object):
  File "/usr/lib/python2.7/dist-packages/autopilot/keybindings.py", line 230, in KeybindingsHelper
    _keyboard = Keyboard()
  File "/usr/lib/python2.7/dist-packages/autopilot/emulators/X11.py", line 109, in __init__
    self.shifted_keys = [k[1] for k in get_display()._keymap_codes if k]
  File "/usr/lib/python2.7/dist-packages/autopilot/emulators/X11.py", line 45, in get_display
    _DISPLAY = Display()
  File "/usr/lib/pymodules/python2.7/Xlib/display.py", line 83, in __init__
    self.display = _BaseDisplay(display)
  File "/usr/lib/pymodules/python2.7/Xlib/display.py", line 65, in __init__
    apply(protocol.display.Display.__init__, (self, ) + args, keys)
  File "/usr/lib/pymodules/python2.7/Xlib/protocol/display.py", line 44, in __init__
    name, host, displayno, screenno = connect.get_display(display)
  File "/usr/lib/pymodules/python2.7/Xlib/support/connect.py", line 65, in get_display
    return mod.get_display(display)
  File "/usr/lib/pymodules/python2.7/Xlib/support/unix_connect.py", line 59, in get_display
    raise error.DisplayNameError(display)
DisplayNameError: Bad display name ""

Tests running...

Ran 11 tests in 0.003s
OK
mmrazik@fry:/tmp/autopilot/autopilot$ echo $?
0