'Test IconsMixin that calls static on a non-existent file'

def test_access_icons_property(self):

    class CustomObj(IconsMixin, object, ):
        _icon = u'custom'
    custom_obj = CustomObj()
    try:
        icons = custom_obj.icons
    except Exception as e:
        self.fail(u"'.icons'    access    raised    Exception    {0}    unexpectedly!".format(e))
    self.assertEqual(len(icons), len(filer_settings.FILER_ADMIN_ICON_SIZES))
