[content/test/gpu] Run pylint check of gpu tests in unittest instead of PRESUBMIT

third_party/logilab/logilab/common/testlib.py

Index: third_party/logilab/logilab/common/testlib.py
diff --git a/third_party/logilab/logilab/common/testlib.py b/third_party/logilab/logilab/common/testlib.py
new file mode 100644
index 0000000000000000000000000000000000000000..31efe567bcc80cb48dc1e669eb62b101d05da657
--- /dev/null
+++ b/third_party/logilab/logilab/common/testlib.py
@@ -0,0 +1,1392 @@
+# -*- coding: utf-8 -*-
+# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of logilab-common.
+#
+# logilab-common is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option) any
+# later version.
+#
+# logilab-common is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with logilab-common.  If not, see <http://www.gnu.org/licenses/>.
+"""Run tests.
+
+This will find all modules whose name match a given prefix in the test
+directory, and run them. Various command line options provide
+additional facilities.
+
+Command line options:
+
+ -v  verbose -- run tests in verbose mode with output to stdout
+ -q  quiet   -- don't print anything except if a test fails
+ -t  testdir -- directory where the tests will be found
+ -x  exclude -- add a test to exclude
+ -p  profile -- profiled execution
+ -d  dbc     -- enable design-by-contract
+ -m  match   -- only run test matching the tag pattern which follow
+
+If no non-option arguments are present, prefixes used are 'test',
+'regrtest', 'smoketest' and 'unittest'.
+
+"""
+
+from __future__ import print_function
+
+__docformat__ = "restructuredtext en"
+# modified copy of some functions from test/regrtest.py from PyXml
+# disable camel case warning
+# pylint: disable=C0103
+
+import sys
+import os, os.path as osp
+import re
+import traceback
+import inspect
+import difflib
+import tempfile
+import math
+import warnings
+from shutil import rmtree
+from operator import itemgetter
+from itertools import dropwhile
+from inspect import isgeneratorfunction
+
+from six import string_types
+from six.moves import builtins, range, configparser, input
+
+from logilab.common.deprecation import deprecated
+
+import unittest as unittest_legacy
+if not getattr(unittest_legacy, "__package__", None):
+    try:
+        import unittest2 as unittest
+        from unittest2 import SkipTest
+    except ImportError:
+        raise ImportError("You have to install python-unittest2 to use %s" % __name__)
+else:
+    import unittest
+    from unittest import SkipTest
+
+from functools import wraps
+
+from logilab.common.debugger import Debugger, colorize_source
+from logilab.common.decorators import cached, classproperty
+from logilab.common import textutils
+
+
+__all__ = ['main', 'unittest_main', 'find_tests', 'run_test', 'spawn']
+
+DEFAULT_PREFIXES = ('test', 'regrtest', 'smoketest', 'unittest',
+                    'func', 'validation')
+
+is_generator = deprecated('[lgc 0.63] use inspect.isgeneratorfunction')(isgeneratorfunction)
+
+# used by unittest to count the number of relevant levels in the traceback
+__unittest = 1
+
+
+def with_tempdir(callable):
+    """A decorator ensuring no temporary file left when the function return
+    Work only for temporary file create with the tempfile module"""
+    if isgeneratorfunction(callable):
+        def proxy(*args, **kwargs):
+            old_tmpdir = tempfile.gettempdir()
+            new_tmpdir = tempfile.mkdtemp(prefix="temp-lgc-")
+            tempfile.tempdir = new_tmpdir
+            try:
+                for x in callable(*args, **kwargs):
+                    yield x
+            finally:
+                try:
+                    rmtree(new_tmpdir, ignore_errors=True)
+                finally:
+                    tempfile.tempdir = old_tmpdir
+        return proxy
+
+    @wraps(callable)
+    def proxy(*args, **kargs):
+
+        old_tmpdir = tempfile.gettempdir()
+        new_tmpdir = tempfile.mkdtemp(prefix="temp-lgc-")
+        tempfile.tempdir = new_tmpdir
+        try:
+            return callable(*args, **kargs)
+        finally:
+            try:
+                rmtree(new_tmpdir, ignore_errors=True)
+            finally:
+                tempfile.tempdir = old_tmpdir
+    return proxy
+
+def in_tempdir(callable):
+    """A decorator moving the enclosed function inside the tempfile.tempfdir
+    """
+    @wraps(callable)
+    def proxy(*args, **kargs):
+
+        old_cwd = os.getcwd()
+        os.chdir(tempfile.tempdir)
+        try:
+            return callable(*args, **kargs)
+        finally:
+            os.chdir(old_cwd)
+    return proxy
+
+def within_tempdir(callable):
+    """A decorator run the enclosed function inside a tmpdir removed after execution
+    """
+    proxy = with_tempdir(in_tempdir(callable))
+    proxy.__name__ = callable.__name__
+    return proxy
+
+def find_tests(testdir,
+               prefixes=DEFAULT_PREFIXES, suffix=".py",
+               excludes=(),
+               remove_suffix=True):
+    """
+    Return a list of all applicable test modules.
+    """
+    tests = []
+    for name in os.listdir(testdir):
+        if not suffix or name.endswith(suffix):
+            for prefix in prefixes:
+                if name.startswith(prefix):
+                    if remove_suffix and name.endswith(suffix):
+                        name = name[:-len(suffix)]
+                    if name not in excludes:
+                        tests.append(name)
+    tests.sort()
+    return tests
+
+
+## PostMortem Debug facilities #####
+def start_interactive_mode(result):
+    """starts an interactive shell so that the user can inspect errors
+    """
+    debuggers = result.debuggers
+    descrs = result.error_descrs + result.fail_descrs
+    if len(debuggers) == 1:
+        # don't ask for test name if there's only one failure
+        debuggers[0].start()
+    else:
+        while True:
+            testindex = 0
+            print("Choose a test to debug:")
+            # order debuggers in the same way than errors were printed
+            print("\n".join(['\t%s : %s' % (i, descr) for i, (_, descr)
+                  in enumerate(descrs)]))
+            print("Type 'exit' (or ^D) to quit")
+            print()
+            try:
+                todebug = input('Enter a test name: ')
+                if todebug.strip().lower() == 'exit':
+                    print()
+                    break
+                else:
+                    try:
+                        testindex = int(todebug)
+                        debugger = debuggers[descrs[testindex][0]]
+                    except (ValueError, IndexError):
+                        print("ERROR: invalid test number %r" % (todebug, ))
+                    else:
+                        debugger.start()
+            except (EOFError, KeyboardInterrupt):
+                print()
+                break
+
+
+# test utils ##################################################################
+
+class SkipAwareTestResult(unittest._TextTestResult):
+
+    def __init__(self, stream, descriptions, verbosity,
+                 exitfirst=False, pdbmode=False, cvg=None, colorize=False):
+        super(SkipAwareTestResult, self).__init__(stream,
+                                                  descriptions, verbosity)
+        self.skipped = []
+        self.debuggers = []
+        self.fail_descrs = []
+        self.error_descrs = []
+        self.exitfirst = exitfirst
+        self.pdbmode = pdbmode
+        self.cvg = cvg
+        self.colorize = colorize
+        self.pdbclass = Debugger
+        self.verbose = verbosity > 1
+
+    def descrs_for(self, flavour):
+        return getattr(self, '%s_descrs' % flavour.lower())
+
+    def _create_pdb(self, test_descr, flavour):
+        self.descrs_for(flavour).append( (len(self.debuggers), test_descr) )
+        if self.pdbmode:
+            self.debuggers.append(self.pdbclass(sys.exc_info()[2]))
+
+    def _iter_valid_frames(self, frames):
+        """only consider non-testlib frames when formatting  traceback"""
+        lgc_testlib = osp.abspath(__file__)
+        std_testlib = osp.abspath(unittest.__file__)
+        invalid = lambda fi: osp.abspath(fi[1]) in (lgc_testlib, std_testlib)
+        for frameinfo in dropwhile(invalid, frames):
+            yield frameinfo
+
+    def _exc_info_to_string(self, err, test):
+        """Converts a sys.exc_info()-style tuple of values into a string.
+
+        This method is overridden here because we want to colorize
+        lines if --color is passed, and display local variables if
+        --verbose is passed
+        """
+        exctype, exc, tb = err
+        output = ['Traceback (most recent call last)']
+        frames = inspect.getinnerframes(tb)
+        colorize = self.colorize
+        frames = enumerate(self._iter_valid_frames(frames))
+        for index, (frame, filename, lineno, funcname, ctx, ctxindex) in frames:
+            filename = osp.abspath(filename)
+            if ctx is None: # pyc files or C extensions for instance
+                source = '<no source available>'
+            else:
+                source = ''.join(ctx)
+            if colorize:
+                filename = textutils.colorize_ansi(filename, 'magenta')
+                source = colorize_source(source)
+            output.append('  File "%s", line %s, in %s' % (filename, lineno, funcname))
+            output.append('    %s' % source.strip())
+            if self.verbose:
+                output.append('%r == %r' % (dir(frame), test.__module__))
+                output.append('')
+                output.append('    ' + ' local variables '.center(66, '-'))
+                for varname, value in sorted(frame.f_locals.items()):
+                    output.append('    %s: %r' % (varname, value))
+                    if varname == 'self': # special handy processing for self
+                        for varname, value in sorted(vars(value).items()):
+                            output.append('      self.%s: %r' % (varname, value))
+                output.append('    ' + '-' * 66)
+                output.append('')
+        output.append(''.join(traceback.format_exception_only(exctype, exc)))
+        return '\n'.join(output)
+
+    def addError(self, test, err):
+        """err ->  (exc_type, exc, tcbk)"""
+        exc_type, exc, _ = err
+        if isinstance(exc, SkipTest):
+            assert exc_type == SkipTest
+            self.addSkip(test, exc)
+        else:
+            if self.exitfirst:
+                self.shouldStop = True
+            descr = self.getDescription(test)
+            super(SkipAwareTestResult, self).addError(test, err)
+            self._create_pdb(descr, 'error')
+
+    def addFailure(self, test, err):
+        if self.exitfirst:
+            self.shouldStop = True
+        descr = self.getDescription(test)
+        super(SkipAwareTestResult, self).addFailure(test, err)
+        self._create_pdb(descr, 'fail')
+
+    def addSkip(self, test, reason):
+        self.skipped.append((test, reason))
+        if self.showAll:
+            self.stream.writeln("SKIPPED")
+        elif self.dots:
+            self.stream.write('S')
+
+    def printErrors(self):
+        super(SkipAwareTestResult, self).printErrors()
+        self.printSkippedList()
+
+    def printSkippedList(self):
+        # format (test, err) compatible with unittest2
+        for test, err in self.skipped:
+            descr = self.getDescription(test)
+            self.stream.writeln(self.separator1)
+            self.stream.writeln("%s: %s" % ('SKIPPED', descr))
+            self.stream.writeln("\t%s" % err)
+
+    def printErrorList(self, flavour, errors):
+        for (_, descr), (test, err) in zip(self.descrs_for(flavour), errors):
+            self.stream.writeln(self.separator1)
+            self.stream.writeln("%s: %s" % (flavour, descr))
+            self.stream.writeln(self.separator2)
+            self.stream.writeln(err)
+            self.stream.writeln('no stdout'.center(len(self.separator2)))
+            self.stream.writeln('no stderr'.center(len(self.separator2)))
+
+# Add deprecation warnings about new api used by module level fixtures in unittest2
+# http://www.voidspace.org.uk/python/articles/unittest2.shtml#setupmodule-and-teardownmodule
+class _DebugResult(object): # simplify import statement among unittest flavors..
+    "Used by the TestSuite to hold previous class when running in debug."
+    _previousTestClass = None
+    _moduleSetUpFailed = False
+    shouldStop = False
+
+from logilab.common.decorators import monkeypatch
+@monkeypatch(unittest.TestSuite)
+def _handleModuleTearDown(self, result):
+    previousModule = self._get_previous_module(result)
+    if previousModule is None:
+        return
+    if result._moduleSetUpFailed:
+        return
+    try:
+        module = sys.modules[previousModule]
+    except KeyError:
+        return
+    # add testlib specific deprecation warning and switch to new api
+    if hasattr(module, 'teardown_module'):
+        warnings.warn('Please rename teardown_module() to tearDownModule() instead.',
+                      DeprecationWarning)
+        setattr(module, 'tearDownModule', module.teardown_module)
+    # end of monkey-patching
+    tearDownModule = getattr(module, 'tearDownModule', None)
+    if tearDownModule is not None:
+        try:
+            tearDownModule()
+        except Exception as e:
+            if isinstance(result, _DebugResult):
+                raise
+            errorName = 'tearDownModule (%s)' % previousModule
+            self._addClassOrModuleLevelException(result, e, errorName)
+
+@monkeypatch(unittest.TestSuite)
+def _handleModuleFixture(self, test, result):
+    previousModule = self._get_previous_module(result)
+    currentModule = test.__class__.__module__
+    if currentModule == previousModule:
+        return
+    self._handleModuleTearDown(result)
+    result._moduleSetUpFailed = False
+    try:
+        module = sys.modules[currentModule]
+    except KeyError:
+        return
+    # add testlib specific deprecation warning and switch to new api
+    if hasattr(module, 'setup_module'):
+        warnings.warn('Please rename setup_module() to setUpModule() instead.',
+                      DeprecationWarning)
+        setattr(module, 'setUpModule', module.setup_module)
+    # end of monkey-patching
+    setUpModule = getattr(module, 'setUpModule', None)
+    if setUpModule is not None:
+        try:
+            setUpModule()
+        except Exception as e:
+            if isinstance(result, _DebugResult):
+                raise
+            result._moduleSetUpFailed = True
+            errorName = 'setUpModule (%s)' % currentModule
+            self._addClassOrModuleLevelException(result, e, errorName)
+
+# backward compatibility: TestSuite might be imported from lgc.testlib
+TestSuite = unittest.TestSuite
+
+class keywords(dict):
+    """Keyword args (**kwargs) support for generative tests."""
+
+class starargs(tuple):
+    """Variable arguments (*args) for generative tests."""
+    def __new__(cls, *args):
+        return tuple.__new__(cls, args)
+
+unittest_main = unittest.main
+
+
+class InnerTestSkipped(SkipTest):
+    """raised when a test is skipped"""
+    pass
+
+def parse_generative_args(params):
+    args = []
+    varargs = ()
+    kwargs = {}
+    flags = 0 # 2 <=> starargs, 4 <=> kwargs
+    for param in params:
+        if isinstance(param, starargs):
+            varargs = param
+            if flags:
+                raise TypeError('found starargs after keywords !')
+            flags |= 2
+            args += list(varargs)
+        elif isinstance(param, keywords):
+            kwargs = param
+            if flags & 4:
+                raise TypeError('got multiple keywords parameters')
+            flags |= 4
+        elif flags & 2 or flags & 4:
+            raise TypeError('found parameters after kwargs or args')
+        else:
+            args.append(param)
+
+    return args, kwargs
+
+
+class InnerTest(tuple):
+    def __new__(cls, name, *data):
+        instance = tuple.__new__(cls, data)
+        instance.name = name
+        return instance
+
+class Tags(set):
+    """A set of tag able validate an expression"""
+
+    def __init__(self, *tags, **kwargs):
+        self.inherit = kwargs.pop('inherit', True)
+        if kwargs:
+           raise TypeError("%s are an invalid keyword argument for this function" % kwargs.keys())
+
+        if len(tags) == 1 and not isinstance(tags[0], string_types):
+            tags = tags[0]
+        super(Tags, self).__init__(tags, **kwargs)
+
+    def __getitem__(self, key):
+        return key in self
+
+    def match(self, exp):
+        return eval(exp, {}, self)
+
+
+# duplicate definition from unittest2 of the _deprecate decorator
+def _deprecate(original_func):
+    def deprecated_func(*args, **kwargs):
+        warnings.warn(
+            ('Please use %s instead.' % original_func.__name__),
+            DeprecationWarning, 2)
+        return original_func(*args, **kwargs)
+    return deprecated_func
+
+class TestCase(unittest.TestCase):
+    """A unittest.TestCase extension with some additional methods."""
+    maxDiff = None
+    pdbclass = Debugger
+    tags = Tags()
+
+    def __init__(self, methodName='runTest'):
+        super(TestCase, self).__init__(methodName)
+        self.__exc_info = sys.exc_info
+        self.__testMethodName = self._testMethodName
+        self._current_test_descr = None
+        self._options_ = None
+
+    @classproperty
+    @cached
+    def datadir(cls): # pylint: disable=E0213
+        """helper attribute holding the standard test's data directory
+
+        NOTE: this is a logilab's standard
+        """
+        mod = __import__(cls.__module__)
+        return osp.join(osp.dirname(osp.abspath(mod.__file__)), 'data')
+    # cache it (use a class method to cache on class since TestCase is
+    # instantiated for each test run)
+
+    @classmethod
+    def datapath(cls, *fname):
+        """joins the object's datadir and `fname`"""
+        return osp.join(cls.datadir, *fname)
+
+    def set_description(self, descr):
+        """sets the current test's description.
+        This can be useful for generative tests because it allows to specify
+        a description per yield
+        """
+        self._current_test_descr = descr
+
+    # override default's unittest.py feature
+    def shortDescription(self):
+        """override default unittest shortDescription to handle correctly
+        generative tests
+        """
+        if self._current_test_descr is not None:
+            return self._current_test_descr
+        return super(TestCase, self).shortDescription()
+
+    def quiet_run(self, result, func, *args, **kwargs):
+        try:
+            func(*args, **kwargs)
+        except (KeyboardInterrupt, SystemExit):
+            raise
+        except unittest.SkipTest as e:
+            if hasattr(result, 'addSkip'):
+                result.addSkip(self, str(e))
+            else:
+                warnings.warn("TestResult has no addSkip method, skips not reported",
+                              RuntimeWarning, 2)
+                result.addSuccess(self)
+            return False
+        except:
+            result.addError(self, self.__exc_info())
+            return False
+        return True
+
+    def _get_test_method(self):
+        """return the test method"""
+        return getattr(self, self._testMethodName)
+
+    def optval(self, option, default=None):
+        """return the option value or default if the option is not define"""
+        return getattr(self._options_, option, default)
+
+    def __call__(self, result=None, runcondition=None, options=None):
+        """rewrite TestCase.__call__ to support generative tests
+        This is mostly a copy/paste from unittest.py (i.e same
+        variable names, same logic, except for the generative tests part)
+        """
+        from logilab.common.pytest import FILE_RESTART
+        if result is None:
+            result = self.defaultTestResult()
+        result.pdbclass = self.pdbclass
+        self._options_ = options
+        # if result.cvg:
+        #     result.cvg.start()
+        testMethod = self._get_test_method()
+        if (getattr(self.__class__, "__unittest_skip__", False) or
+            getattr(testMethod, "__unittest_skip__", False)):
+            # If the class or method was skipped.
+            try:
+                skip_why = (getattr(self.__class__, '__unittest_skip_why__', '')
+                            or getattr(testMethod, '__unittest_skip_why__', ''))
+                self._addSkip(result, skip_why)
+            finally:
+                result.stopTest(self)
+            return
+        if runcondition and not runcondition(testMethod):
+            return # test is skipped
+        result.startTest(self)
+        try:
+            if not self.quiet_run(result, self.setUp):
+                return
+            generative = isgeneratorfunction(testMethod)
+            # generative tests
+            if generative:
+                self._proceed_generative(result, testMethod,
+                                         runcondition)
+            else:
+                status = self._proceed(result, testMethod)
+                success = (status == 0)
+            if not self.quiet_run(result, self.tearDown):
+                return
+            if not generative and success:
+                if hasattr(options, "exitfirst") and options.exitfirst:
+                    # add this test to restart file
+                    try:
+                        restartfile = open(FILE_RESTART, 'a')
+                        try:
+                            descr = '.'.join((self.__class__.__module__,
+                                              self.__class__.__name__,
+                                              self._testMethodName))
+                            restartfile.write(descr+os.linesep)
+                        finally:
+                            restartfile.close()
+                    except Exception:
+                        print("Error while saving succeeded test into",
+                              osp.join(os.getcwd(), FILE_RESTART),
+                              file=sys.__stderr__)
+                        raise
+                result.addSuccess(self)
+        finally:
+            # if result.cvg:
+            #     result.cvg.stop()
+            result.stopTest(self)
+
+    def _proceed_generative(self, result, testfunc, runcondition=None):
+        # cancel startTest()'s increment
+        result.testsRun -= 1
+        success = True
+        try:
+            for params in testfunc():
+                if runcondition and not runcondition(testfunc,
+                        skipgenerator=False):
+                    if not (isinstance(params, InnerTest)
+                            and runcondition(params)):
+                        continue
+                if not isinstance(params, (tuple, list)):
+                    params = (params, )
+                func = params[0]
+                args, kwargs = parse_generative_args(params[1:])
+                # increment test counter manually
+                result.testsRun += 1
+                status = self._proceed(result, func, args, kwargs)
+                if status == 0:
+                    result.addSuccess(self)
+                    success = True
+                else:
+                    success = False
+                    # XXX Don't stop anymore if an error occured
+                    #if status == 2:
+                    #    result.shouldStop = True
+                if result.shouldStop: # either on error or on exitfirst + error
+                    break
+        except:
+            # if an error occurs between two yield
+            result.addError(self, self.__exc_info())
+            success = False
+        return success
+
+    def _proceed(self, result, testfunc, args=(), kwargs=None):
+        """proceed the actual test
+        returns 0 on success, 1 on failure, 2 on error
+
+        Note: addSuccess can't be called here because we have to wait
+        for tearDown to be successfully executed to declare the test as
+        successful
+        """
+        kwargs = kwargs or {}
+        try:
+            testfunc(*args, **kwargs)
+        except self.failureException:
+            result.addFailure(self, self.__exc_info())
+            return 1
+        except KeyboardInterrupt:
+            raise
+        except InnerTestSkipped as e:
+            result.addSkip(self, e)
+            return 1
+        except SkipTest as e:
+            result.addSkip(self, e)
+            return 0
+        except:
+            result.addError(self, self.__exc_info())
+            return 2
+        return 0
+
+    def defaultTestResult(self):
+        """return a new instance of the defaultTestResult"""
+        return SkipAwareTestResult()
+
+    skip = _deprecate(unittest.TestCase.skipTest)
+    assertEquals = _deprecate(unittest.TestCase.assertEqual)
+    assertNotEquals = _deprecate(unittest.TestCase.assertNotEqual)
+    assertAlmostEquals = _deprecate(unittest.TestCase.assertAlmostEqual)
+    assertNotAlmostEquals = _deprecate(unittest.TestCase.assertNotAlmostEqual)
+
+    def innerSkip(self, msg=None):
+        """mark a generative test as skipped for the <msg> reason"""
+        msg = msg or 'test was skipped'
+        raise InnerTestSkipped(msg)
+
+    @deprecated('Please use assertDictEqual instead.')
+    def assertDictEquals(self, dict1, dict2, msg=None, context=None):
+        """compares two dicts
+
+        If the two dict differ, the first difference is shown in the error
+        message
+        :param dict1: a Python Dictionary
+        :param dict2: a Python Dictionary
+        :param msg: custom message (String) in case of failure
+        """
+        dict1 = dict(dict1)
+        msgs = []
+        for key, value in dict2.items():
+            try:
+                if dict1[key] != value:
+                    msgs.append('%r != %r for key %r' % (dict1[key], value,
+                        key))
+                del dict1[key]
+            except KeyError:
+                msgs.append('missing %r key' % key)
+        if dict1:
+            msgs.append('dict2 is lacking %r' % dict1)
+        if msg:
+            self.failureException(msg)
+        elif msgs:
+            if context is not None:
+                base = '%s\n' % context
+            else:
+                base = ''
+            self.fail(base + '\n'.join(msgs))
+
+    @deprecated('Please use assertCountEqual instead.')
+    def assertUnorderedIterableEquals(self, got, expected, msg=None):
+        """compares two iterable and shows difference between both
+
+        :param got: the unordered Iterable that we found
+        :param expected: the expected unordered Iterable
+        :param msg: custom message (String) in case of failure
+        """
+        got, expected = list(got), list(expected)
+        self.assertSetEqual(set(got), set(expected), msg)
+        if len(got) != len(expected):
+            if msg is None:
+                msg = ['Iterable have the same elements but not the same number',
+                       '\t<element>\t<expected>i\t<got>']
+                got_count = {}
+                expected_count = {}
+                for element in got:
+                    got_count[element] = got_count.get(element, 0) + 1
+                for element in expected:
+                    expected_count[element] = expected_count.get(element, 0) + 1
+                # we know that got_count.key() == expected_count.key()
+                # because of assertSetEqual
+                for element, count in got_count.iteritems():
+                    other_count = expected_count[element]
+                    if other_count != count:
+                        msg.append('\t%s\t%s\t%s' % (element, other_count, count))
+
+            self.fail(msg)
+
+    assertUnorderedIterableEqual = assertUnorderedIterableEquals
+    assertUnordIterEquals = assertUnordIterEqual = assertUnorderedIterableEqual
+
+    @deprecated('Please use assertSetEqual instead.')
+    def assertSetEquals(self,got,expected, msg=None):
+        """compares two sets and shows difference between both
+
+        Don't use it for iterables other than sets.
+
+        :param got: the Set that we found
+        :param expected: the second Set to be compared to the first one
+        :param msg: custom message (String) in case of failure
+        """
+
+        if not(isinstance(got, set) and isinstance(expected, set)):
+            warnings.warn("the assertSetEquals function if now intended for set only."\
+                          "use assertUnorderedIterableEquals instead.",
+                DeprecationWarning, 2)
+            return self.assertUnorderedIterableEquals(got, expected, msg)
+
+        items={}
+        items['missing'] = expected - got
+        items['unexpected'] = got - expected
+        if any(items.itervalues()):
+            if msg is None:
+                msg = '\n'.join('%s:\n\t%s' % (key, "\n\t".join(str(value) for value in values))
+                    for key, values in items.iteritems() if values)
+            self.fail(msg)
+
+    @deprecated('Please use assertListEqual instead.')
+    def assertListEquals(self, list_1, list_2, msg=None):
+        """compares two lists
+
+        If the two list differ, the first difference is shown in the error
+        message
+
+        :param list_1: a Python List
+        :param list_2: a second Python List
+        :param msg: custom message (String) in case of failure
+        """
+        _l1 = list_1[:]
+        for i, value in enumerate(list_2):
+            try:
+                if _l1[0] != value:
+                    from pprint import pprint
+                    pprint(list_1)
+                    pprint(list_2)
+                    self.fail('%r != %r for index %d' % (_l1[0], value, i))
+                del _l1[0]
+            except IndexError:
+                if msg is None:
+                    msg = 'list_1 has only %d elements, not %s '\
+                        '(at least %r missing)'% (i, len(list_2), value)
+                self.fail(msg)
+        if _l1:
+            if msg is None:
+                msg = 'list_2 is lacking %r' % _l1
+            self.fail(msg)
+
+    @deprecated('Non-standard. Please use assertMultiLineEqual instead.')
+    def assertLinesEquals(self, string1, string2, msg=None, striplines=False):
+        """compare two strings and assert that the text lines of the strings
+        are equal.
+
+        :param string1: a String
+        :param string2: a String
+        :param msg: custom message (String) in case of failure
+        :param striplines: Boolean to trigger line stripping before comparing
+        """
+        lines1 = string1.splitlines()
+        lines2 = string2.splitlines()
+        if striplines:
+            lines1 = [l.strip() for l in lines1]
+            lines2 = [l.strip() for l in lines2]
+        self.assertListEqual(lines1, lines2, msg)
+    assertLineEqual = assertLinesEquals
+
+    @deprecated('Non-standard: please copy test method to your TestCase class')
+    def assertXMLWellFormed(self, stream, msg=None, context=2):
+        """asserts the XML stream is well-formed (no DTD conformance check)
+
+        :param context: number of context lines in standard message
+                        (show all data if negative).
+                        Only available with element tree
+        """
+        try:
+            from xml.etree.ElementTree import parse
+            self._assertETXMLWellFormed(stream, parse, msg)
+        except ImportError:
+            from xml.sax import make_parser, SAXParseException
+            parser = make_parser()
+            try:
+                parser.parse(stream)
+            except SAXParseException as ex:
+                if msg is None:
+                    stream.seek(0)
+                    for _ in range(ex.getLineNumber()):
+                        line = stream.readline()
+                    pointer = ('' * (ex.getLineNumber() - 1)) + '^'
+                    msg = 'XML stream not well formed: %s\n%s%s' % (ex, line, pointer)
+                self.fail(msg)
+
+    @deprecated('Non-standard: please copy test method to your TestCase class')
+    def assertXMLStringWellFormed(self, xml_string, msg=None, context=2):
+        """asserts the XML string is well-formed (no DTD conformance check)
+
+        :param context: number of context lines in standard message
+                        (show all data if negative).
+                        Only available with element tree
+        """
+        try:
+            from xml.etree.ElementTree import fromstring
+        except ImportError:
+            from elementtree.ElementTree import fromstring
+        self._assertETXMLWellFormed(xml_string, fromstring, msg)
+
+    def _assertETXMLWellFormed(self, data, parse, msg=None, context=2):
+        """internal function used by /assertXML(String)?WellFormed/ functions
+
+        :param data: xml_data
+        :param parse: appropriate parser function for this data
+        :param msg: error message
+        :param context: number of context lines in standard message
+                        (show all data if negative).
+                        Only available with element tree
+        """
+        from xml.parsers.expat import ExpatError
+        try:
+            from xml.etree.ElementTree import ParseError
+        except ImportError:
+            # compatibility for <python2.7
+            ParseError = ExpatError
+        try:
+            parse(data)
+        except (ExpatError, ParseError) as ex:
+            if msg is None:
+                if hasattr(data, 'readlines'): #file like object
+                    data.seek(0)
+                    lines = data.readlines()
+                else:
+                    lines = data.splitlines(True)
+                nb_lines = len(lines)
+                context_lines = []
+
+                # catch when ParseError doesn't set valid lineno
+                if ex.lineno is not None:
+                    if context < 0:
+                        start = 1
+                        end   = nb_lines
+                    else:
+                        start = max(ex.lineno-context, 1)
+                        end   = min(ex.lineno+context, nb_lines)
+                    line_number_length = len('%i' % end)
+                    line_pattern = " %%%ii: %%s" % line_number_length
+
+                    for line_no in range(start, ex.lineno):
+                        context_lines.append(line_pattern % (line_no, lines[line_no-1]))
+                    context_lines.append(line_pattern % (ex.lineno, lines[ex.lineno-1]))
+                    context_lines.append('%s^\n' % (' ' * (1 + line_number_length + 2 +ex.offset)))
+                    for line_no in range(ex.lineno+1, end+1):
+                        context_lines.append(line_pattern % (line_no, lines[line_no-1]))
+
+                rich_context = ''.join(context_lines)
+                msg = 'XML stream not well formed: %s\n%s' % (ex, rich_context)
+            self.fail(msg)
+
+    @deprecated('Non-standard: please copy test method to your TestCase class')
+    def assertXMLEqualsTuple(self, element, tup):
+        """compare an ElementTree Element to a tuple formatted as follow:
+        (tagname, [attrib[, children[, text[, tail]]]])"""
+        # check tag
+        self.assertTextEquals(element.tag, tup[0])
+        # check attrib
+        if len(element.attrib) or len(tup)>1:
+            if len(tup)<=1:
+                self.fail( "tuple %s has no attributes (%s expected)"%(tup,
+                    dict(element.attrib)))
+            self.assertDictEqual(element.attrib, tup[1])
+        # check children
+        if len(element) or len(tup)>2:
+            if len(tup)<=2:
+                self.fail( "tuple %s has no children (%i expected)"%(tup,
+                    len(element)))
+            if len(element) != len(tup[2]):
+                self.fail( "tuple %s has %i children%s (%i expected)"%(tup,
+                    len(tup[2]),
+                        ('', 's')[len(tup[2])>1], len(element)))
+            for index in range(len(tup[2])):
+                self.assertXMLEqualsTuple(element[index], tup[2][index])
+        #check text
+        if element.text or len(tup)>3:
+            if len(tup)<=3:
+                self.fail( "tuple %s has no text value (%r expected)"%(tup,
+                    element.text))
+            self.assertTextEquals(element.text, tup[3])
+        #check tail
+        if element.tail or len(tup)>4:
+            if len(tup)<=4:
+                self.fail( "tuple %s has no tail value (%r expected)"%(tup,
+                    element.tail))
+            self.assertTextEquals(element.tail, tup[4])
+
+    def _difftext(self, lines1, lines2, junk=None, msg_prefix='Texts differ'):
+        junk = junk or (' ', '\t')
+        # result is a generator
+        result = difflib.ndiff(lines1, lines2, charjunk=lambda x: x in junk)
+        read = []
+        for line in result:
+            read.append(line)
+            # lines that don't start with a ' ' are diff ones
+            if not line.startswith(' '):
+                self.fail('\n'.join(['%s\n'%msg_prefix]+read + list(result)))
+
+    @deprecated('Non-standard. Please use assertMultiLineEqual instead.')
+    def assertTextEquals(self, text1, text2, junk=None,
+            msg_prefix='Text differ', striplines=False):
+        """compare two multiline strings (using difflib and splitlines())
+
+        :param text1: a Python BaseString
+        :param text2: a second Python Basestring
+        :param junk: List of Caracters
+        :param msg_prefix: String (message prefix)
+        :param striplines: Boolean to trigger line stripping before comparing
+        """
+        msg = []
+        if not isinstance(text1, string_types):
+            msg.append('text1 is not a string (%s)'%(type(text1)))
+        if not isinstance(text2, string_types):
+            msg.append('text2 is not a string (%s)'%(type(text2)))
+        if msg:
+            self.fail('\n'.join(msg))
+        lines1 = text1.strip().splitlines(True)
+        lines2 = text2.strip().splitlines(True)
+        if striplines:
+            lines1 = [line.strip() for line in lines1]
+            lines2 = [line.strip() for line in lines2]
+        self._difftext(lines1, lines2, junk,  msg_prefix)
+    assertTextEqual = assertTextEquals
+
+    @deprecated('Non-standard: please copy test method to your TestCase class')
+    def assertStreamEquals(self, stream1, stream2, junk=None,
+            msg_prefix='Stream differ'):
+        """compare two streams (using difflib and readlines())"""
+        # if stream2 is stream2, readlines() on stream1 will also read lines
+        # in stream2, so they'll appear different, although they're not
+        if stream1 is stream2:
+            return
+        # make sure we compare from the beginning of the stream
+        stream1.seek(0)
+        stream2.seek(0)
+        # compare
+        self._difftext(stream1.readlines(), stream2.readlines(), junk,
+             msg_prefix)
+
+    assertStreamEqual = assertStreamEquals
+
+    @deprecated('Non-standard: please copy test method to your TestCase class')
+    def assertFileEquals(self, fname1, fname2, junk=(' ', '\t')):
+        """compares two files using difflib"""
+        self.assertStreamEqual(open(fname1), open(fname2), junk,
+            msg_prefix='Files differs\n-:%s\n+:%s\n'%(fname1, fname2))
+
+    assertFileEqual = assertFileEquals
+
+    @deprecated('Non-standard: please copy test method to your TestCase class')
+    def assertDirEquals(self, path_a, path_b):
+        """compares two files using difflib"""
+        assert osp.exists(path_a), "%s doesn't exists" % path_a
+        assert osp.exists(path_b), "%s doesn't exists" % path_b
+
+        all_a = [ (ipath[len(path_a):].lstrip('/'), idirs, ifiles)
+                    for ipath, idirs, ifiles in os.walk(path_a)]
+        all_a.sort(key=itemgetter(0))
+
+        all_b = [ (ipath[len(path_b):].lstrip('/'), idirs, ifiles)
+                    for ipath, idirs, ifiles in os.walk(path_b)]
+        all_b.sort(key=itemgetter(0))
+
+        iter_a, iter_b = iter(all_a), iter(all_b)
+        partial_iter = True
+        ipath_a, idirs_a, ifiles_a = data_a = None, None, None
+        while True:
+            try:
+                ipath_a, idirs_a, ifiles_a = datas_a = next(iter_a)
+                partial_iter = False
+                ipath_b, idirs_b, ifiles_b = datas_b = next(iter_b)
+                partial_iter = True
+
+
+                self.assertTrue(ipath_a == ipath_b,
+                    "unexpected %s in %s while looking %s from %s" %
+                    (ipath_a, path_a, ipath_b, path_b))
+
+
+                errors = {}
+                sdirs_a = set(idirs_a)
+                sdirs_b = set(idirs_b)
+                errors["unexpected directories"] = sdirs_a - sdirs_b
+                errors["missing directories"] = sdirs_b - sdirs_a
+
+                sfiles_a = set(ifiles_a)
+                sfiles_b = set(ifiles_b)
+                errors["unexpected files"] = sfiles_a - sfiles_b
+                errors["missing files"] = sfiles_b - sfiles_a
+
+
+                msgs = [ "%s: %s"% (name, items)
+                    for name, items in errors.items() if items]
+
+                if msgs:
+                    msgs.insert(0, "%s and %s differ :" % (
+                        osp.join(path_a, ipath_a),
+                        osp.join(path_b, ipath_b),
+                        ))
+                    self.fail("\n".join(msgs))
+
+                for files in (ifiles_a, ifiles_b):
+                    files.sort()
+
+                for index, path in enumerate(ifiles_a):
+                    self.assertFileEquals(osp.join(path_a, ipath_a, path),
+                        osp.join(path_b, ipath_b, ifiles_b[index]))
+
+            except StopIteration:
+                break
+
+    assertDirEqual = assertDirEquals
+
+    def assertIsInstance(self, obj, klass, msg=None, strict=False):
+        """check if an object is an instance of a class
+
+        :param obj: the Python Object to be checked
+        :param klass: the target class
+        :param msg: a String for a custom message
+        :param strict: if True, check that the class of <obj> is <klass>;
+                       else check with 'isinstance'
+        """
+        if strict:
+            warnings.warn('[API] Non-standard. Strict parameter has vanished',
+                          DeprecationWarning, stacklevel=2)
+        if msg is None:
+            if strict:
+                msg = '%r is not of class %s but of %s'
+            else:
+                msg = '%r is not an instance of %s but of %s'
+            msg = msg % (obj, klass, type(obj))
+        if strict:
+            self.assertTrue(obj.__class__ is klass, msg)
+        else:
+            self.assertTrue(isinstance(obj, klass), msg)
+
+    @deprecated('Please use assertIsNone instead.')
+    def assertNone(self, obj, msg=None):
+        """assert obj is None
+
+        :param obj: Python Object to be tested
+        """
+        if msg is None:
+            msg = "reference to %r when None expected"%(obj,)
+        self.assertTrue( obj is None, msg )
+
+    @deprecated('Please use assertIsNotNone instead.')
+    def assertNotNone(self, obj, msg=None):
+        """assert obj is not None"""
+        if msg is None:
+            msg = "unexpected reference to None"
+        self.assertTrue( obj is not None, msg )
+
+    @deprecated('Non-standard. Please use assertAlmostEqual instead.')
+    def assertFloatAlmostEquals(self, obj, other, prec=1e-5,
+                                relative=False, msg=None):
+        """compares if two floats have a distance smaller than expected
+        precision.
+
+        :param obj: a Float
+        :param other: another Float to be comparted to <obj>
+        :param prec: a Float describing the precision
+        :param relative: boolean switching to relative/absolute precision
+        :param msg: a String for a custom message
+        """
+        if msg is None:
+            msg = "%r != %r" % (obj, other)
+        if relative:
+            prec = prec*math.fabs(obj)
+        self.assertTrue(math.fabs(obj - other) < prec, msg)
+
+    def failUnlessRaises(self, excClass, callableObj=None, *args, **kwargs):
+        """override default failUnlessRaises method to return the raised
+        exception instance.
+
+        Fail unless an exception of class excClass is thrown
+        by callableObj when invoked with arguments args and keyword
+        arguments kwargs. If a different type of exception is
+        thrown, it will not be caught, and the test case will be
+        deemed to have suffered an error, exactly as for an
+        unexpected exception.
+
+        CAUTION! There are subtle differences between Logilab and unittest2
+        - exc is not returned in standard version
+        - context capabilities in standard version
+        - try/except/else construction (minor)
+
+        :param excClass: the Exception to be raised
+        :param callableObj: a callable Object which should raise <excClass>
+        :param args: a List of arguments for <callableObj>
+        :param kwargs: a List of keyword arguments  for <callableObj>
+        """
+        # XXX cube vcslib : test_branches_from_app
+        if callableObj is None:
+            _assert = super(TestCase, self).assertRaises
+            return _assert(excClass, callableObj, *args, **kwargs)
+        try:
+            callableObj(*args, **kwargs)
+        except excClass as exc:
+            class ProxyException:
+                def __init__(self, obj):
+                    self._obj = obj
+                def __getattr__(self, attr):
+                    warn_msg = ("This exception was retrieved with the old testlib way "
+                                "`exc = self.assertRaises(Exc, callable)`, please use "
+                                "the context manager instead'")
+                    warnings.warn(warn_msg, DeprecationWarning, 2)
+                    return self._obj.__getattribute__(attr)
+            return ProxyException(exc)
+        else:
+            if hasattr(excClass, '__name__'):
+                excName = excClass.__name__
+            else:
+                excName = str(excClass)
+            raise self.failureException("%s not raised" % excName)
+
+    assertRaises = failUnlessRaises
+
+    if sys.version_info >= (3,2):
+        assertItemsEqual = unittest.TestCase.assertCountEqual
+    else:
+        assertCountEqual = unittest.TestCase.assertItemsEqual
+        if sys.version_info < (2,7):
+            def assertIsNotNone(self, value, *args, **kwargs):
+                self.assertNotEqual(None, value, *args, **kwargs)
+
+TestCase.assertItemsEqual = deprecated('assertItemsEqual is deprecated, use assertCountEqual')(
+    TestCase.assertItemsEqual)
+
+import doctest
+
+class SkippedSuite(unittest.TestSuite):
+    def test(self):
+        """just there to trigger test execution"""
+        self.skipped_test('doctest module has no DocTestSuite class')
+
+
+class DocTestFinder(doctest.DocTestFinder):
+
+    def __init__(self, *args, **kwargs):
+        self.skipped = kwargs.pop('skipped', ())
+        doctest.DocTestFinder.__init__(self, *args, **kwargs)
+
+    def _get_test(self, obj, name, module, globs, source_lines):
+        """override default _get_test method to be able to skip tests
+        according to skipped attribute's value
+        """
+        if getattr(obj, '__name__', '') in self.skipped:
+            return None
+        return doctest.DocTestFinder._get_test(self, obj, name, module,
+                                               globs, source_lines)
+
+
+class DocTest(TestCase):
+    """trigger module doctest
+    I don't know how to make unittest.main consider the DocTestSuite instance
+    without this hack
+    """
+    skipped = ()
+    def __call__(self, result=None, runcondition=None, options=None):\
+        # pylint: disable=W0613
+        try:
+            finder = DocTestFinder(skipped=self.skipped)
+            suite = doctest.DocTestSuite(self.module, test_finder=finder)
+            # XXX iirk
+            doctest.DocTestCase._TestCase__exc_info = sys.exc_info
+        except AttributeError:
+            suite = SkippedSuite()
+        # doctest may gork the builtins dictionnary
+        # This happen to the "_" entry used by gettext
+        old_builtins = builtins.__dict__.copy()
+        try:
+            return suite.run(result)
+        finally:
+            builtins.__dict__.clear()
+            builtins.__dict__.update(old_builtins)
+    run = __call__
+
+    def test(self):
+        """just there to trigger test execution"""
+
+MAILBOX = None
+
+class MockSMTP:
+    """fake smtplib.SMTP"""
+
+    def __init__(self, host, port):
+        self.host = host
+        self.port = port
+        global MAILBOX
+        self.reveived = MAILBOX = []
+
+    def set_debuglevel(self, debuglevel):
+        """ignore debug level"""
+
+    def sendmail(self, fromaddr, toaddres, body):
+        """push sent mail in the mailbox"""
+        self.reveived.append((fromaddr, toaddres, body))
+
+    def quit(self):
+        """ignore quit"""
+
+
+class MockConfigParser(configparser.ConfigParser):
+    """fake ConfigParser.ConfigParser"""
+
+    def __init__(self, options):
+        configparser.ConfigParser.__init__(self)
+        for section, pairs in options.iteritems():
+            self.add_section(section)
+            for key, value in pairs.iteritems():
+                self.set(section, key, value)
+    def write(self, _):
+        raise NotImplementedError()
+
+
+class MockConnection:
+    """fake DB-API 2.0 connexion AND cursor (i.e. cursor() return self)"""
+
+    def __init__(self, results):
+        self.received = []
+        self.states = []
+        self.results = results
+
+    def cursor(self):
+        """Mock cursor method"""
+        return self
+    def execute(self, query, args=None):
+        """Mock execute method"""
+        self.received.append( (query, args) )
+    def fetchone(self):
+        """Mock fetchone method"""
+        return self.results[0]
+    def fetchall(self):
+        """Mock fetchall method"""
+        return self.results
+    def commit(self):
+        """Mock commiy method"""
+        self.states.append( ('commit', len(self.received)) )
+    def rollback(self):
+        """Mock rollback method"""
+        self.states.append( ('rollback', len(self.received)) )
+    def close(self):
+        """Mock close method"""
+        pass
+
+
+def mock_object(**params):
+    """creates an object using params to set attributes
+    >>> option = mock_object(verbose=False, index=range(5))
+    >>> option.verbose
+    False
+    >>> option.index
+    [0, 1, 2, 3, 4]
+    """
+    return type('Mock', (), params)()
+
+
+def create_files(paths, chroot):
+    """Creates directories and files found in <path>.
+
+    :param paths: list of relative paths to files or directories
+    :param chroot: the root directory in which paths will be created
+
+    >>> from os.path import isdir, isfile
+    >>> isdir('/tmp/a')
+    False
+    >>> create_files(['a/b/foo.py', 'a/b/c/', 'a/b/c/d/e.py'], '/tmp')
+    >>> isdir('/tmp/a')
+    True
+    >>> isdir('/tmp/a/b/c')
+    True
+    >>> isfile('/tmp/a/b/c/d/e.py')
+    True
+    >>> isfile('/tmp/a/b/foo.py')
+    True
+    """
+    dirs, files = set(), set()
+    for path in paths:
+        path = osp.join(chroot, path)
+        filename = osp.basename(path)
+        # path is a directory path
+        if filename == '':
+            dirs.add(path)
+        # path is a filename path
+        else:
+            dirs.add(osp.dirname(path))
+            files.add(path)
+    for dirpath in dirs:
+        if not osp.isdir(dirpath):
+            os.makedirs(dirpath)
+    for filepath in files:
+        open(filepath, 'w').close()
+
+
+class AttrObject: # XXX cf mock_object
+    def __init__(self, **kwargs):
+        self.__dict__.update(kwargs)
+
+def tag(*args, **kwargs):
+    """descriptor adding tag to a function"""
+    def desc(func):
+        assert not hasattr(func, 'tags')
+        func.tags = Tags(*args, **kwargs)
+        return func
+    return desc
+
+def require_version(version):
+    """ Compare version of python interpreter to the given one. Skip the test
+    if older.
+    """
+    def check_require_version(f):
+        version_elements = version.split('.')
+        try:
+            compare = tuple([int(v) for v in version_elements])
+        except ValueError:
+            raise ValueError('%s is not a correct version : should be X.Y[.Z].' % version)
+        current = sys.version_info[:3]
+        if current < compare:
+            def new_f(self, *args, **kwargs):
+                self.skipTest('Need at least %s version of python. Current version is %s.' % (version, '.'.join([str(element) for element in current])))
+            new_f.__name__ = f.__name__
+            return new_f
+        else:
+            return f
+    return check_require_version
+
+def require_module(module):
+    """ Check if the given module is loaded. Skip the test if not.
+    """
+    def check_require_module(f):
+        try:
+            __import__(module)
+            return f
+        except ImportError:
+            def new_f(self, *args, **kwargs):
+                self.skipTest('%s can not be imported.' % module)
+            new_f.__name__ = f.__name__
+            return new_f
+    return check_require_module
+