Add initial skeleton for a testing framework

This is the first revision that actually performs a test, in that it
starts up OfflineImap and sees if there are any exceptions.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

test/OLItest/TestRunner.py

@@ -0,0 +1,102 @@
+# Copyright (C) 2012- Sebastian Spaeth & contributors
+#
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program 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 General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program; if not, write to the Free Software
+#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+import unittest
+import logging
+import os
+import sys
+import shutil
+import subprocess
+import tempfile
+from ConfigParser import SafeConfigParser
+from OLItest import default_conf
+
+class OLITestLib():
+    cred_file = None
+    testdir = None
+    """Absolute path of the current temporary test directory"""
+    cmd = None
+    """command that will be executed to invoke offlineimap"""
+
+    def __init__(self, cred_file = None, cmd='offlineimap'):
+        """
+
+        :param cred_file: file of the configuration
+            snippet for authenticating against the test IMAP server(s).
+        :param cmd: command that will be executed to invoke offlineimap"""
+        OLITestLib.cred_file = cred_file
+        OLITestLib.cmd = cmd
+
+    @classmethod
+    def create_test_dir(cls, suffix=''):
+        """Creates a test directory and places OLI config there
+
+        Note that this is a class method. There can only be one test
+        directory at a time. OLITestLib is not suited for running
+        several tests in parallel.  The user is responsible for
+        cleaning that up herself."""
+        # creating temporary directory for testing in current dir
+        cls.testdir = os.path.abspath(
+            tempfile.mkdtemp(prefix='tmp_%s_'%suffix, dir='.'))
+        cls.create_config_file()
+        return cls.testdir
+
+    @classmethod
+    def create_config_file(cls):
+        """Creates a OLI configuration file
+
+        It is created in testdir (so create_test_dir has to be called
+        earlier) using the credentials information given (so they had to
+        be set earlier). Failure to do either of them will raise an
+        AssertionException."""
+        assert cls.cred_file != None
+        assert cls.testdir != None
+        config = SafeConfigParser()
+        config.readfp(default_conf)
+        config.read(cls.cred_file)
+        config.set("general", "metadata", cls.testdir)
+        localfolders = os.path.join(cls.testdir, 'mail')
+        config.set("Repository Maildir", "localfolders", localfolders)
+        with open(os.path.join(cls.testdir, 'offlineimap.conf'), "wa") as f:
+            config.write(f)
+
+    @classmethod
+    def delete_test_dir(cls):
+        """Deletes the current test directory
+
+        The users is responsible for cleaning that up herself."""
+        if os.path.isdir(cls.testdir):
+            shutil.rmtree(cls.testdir)
+
+    @classmethod
+    def run_OLI(cls):
+        """Runs OfflineImap
+
+        :returns: (rescode, stdout)
+        """
+        try:
+            output = subprocess.check_output(
+                [cls.cmd,
+                 "-c%s" % os.path.join(cls.testdir, 'offlineimap.conf')],
+                shell=False)
+        except subprocess.CalledProcessError as e:
+            return (e.returncode, e.output)
+        return (0, output)
+
+class OLITextTestRunner(unittest.TextTestRunner):
+
+    def __init__(self,*args, **kwargs):
+        logging.warning("OfflineImap testsuite")
+        return super(OLITextTestRunner, self).__init__(*args, **kwargs)