"""

Module providing backend independent mixin class. It requires that

InMemoryChangeset class is working properly at backend class.

"""

import os

import time

import datetime

from kallithea.lib import vcs

from kallithea.lib.vcs.nodes import FileNode

from kallithea.tests.vcs.conf import SCM_TESTS, get_new_dir

class _BackendTestMixin(object):

    """

    This is a backend independent test case class which should be created

    with ``type`` method.

        for commit in cls._get_commits():

            for node in commit.get('added', []):

                cls.imc.add(FileNode(node.path, content=node.content))

            for node in commit.get('changed', []):

                cls.imc.change(FileNode(node.path, content=node.content))

            for node in commit.get('removed', []):

                cls.imc.remove(FileNode(node.path))

            cls.tip = cls.imc.commit(message=unicode(commit['message']),

                                     author=unicode(commit['author']),

                                     date=commit['date'])

    def setup_method(self, method):

        if getattr(self, 'recreate_repo_per_test', False):

            self.__class__.setup_class()

# For each backend create test case class

for alias in SCM_TESTS:

    attrs = {

        'backend_alias': alias,

    }

    cls_name = ''.join(('%s base backend test' % alias).title().split())

    globals()[cls_name] = type(cls_name, (_BackendTestMixin,), attrs)