tests: Add "create email test"

This is the first test that actually creates a (local) email and
syncs. We check the result of the sync operation, to see if the
server has actually been assigning a proper UID to the email and
bail out if not.

This test therefore excercises our ability to properly detect the
new UID of an APPENDED email. Obviously we still need some
IMAP<->IMAP tests too, but since this is the same codepath being
used for APPENDs in that case, it could also help to detect
instabilities there.

In order to get this test in, the OLITestLib got a few new helper
functions:
- delete_maildir
- create_mail
- get_maildir_uids

The test passes here. I invoke it via:

python -m unittest test.tests.test_01_basic.TestBasicFunctions.test_04_createmail

or run python setup.py test, to run the whole suite.

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

test/OLItest/TestRunner.py

@@ -22,12 +22,15 @@ import sys
 import shutil
 import subprocess
 import tempfile
+import random
+random.seed()
 try:
     from configparser import SafeConfigParser
 except ImportError: # python 2
     from ConfigParser import SafeConfigParser
 from . import default_conf
 
+
 class OLITestLib():
     cred_file = None
     testdir = None
@@ -179,6 +182,36 @@ class OLITestLib():
                 if e.errno != 17: # 'already exists' is ok.
                     raise
 
+    @classmethod
+    def delete_maildir(cls, folder):
+        """Delete maildir 'folder' in our test maildir
+
+        Does not fail if not existing"""
+        assert cls.testdir != None
+        maildir = os.path.join(cls.testdir, 'mail', folder)
+        shutil.rmtree(maildir, ignore_errors=True)
+
+    @classmethod
+    def create_mail(cls, folder, mailfile=None, content=None):
+        """Create a mail in  maildir 'folder'/new
+
+        Use default mailfilename if not given.
+        Use some default content if not given"""
+        assert cls.testdir != None
+        while True:  # Loop till we found a unique filename
+            mailfile = '{}:2,'.format(random.randint(0,999999999))
+            mailfilepath = os.path.join(cls.testdir, 'mail',
+                                        folder, 'new', mailfile)
+            if not os.path.isfile(mailfilepath):
+                break
+        with open(mailfilepath,"wb") as mailf:
+                mailf.write(b'''From: test <test@offlineimap.org>
+Subject: Boo
+Date: 1 Jan 1980
+To: test@offlineimap.org
+
+Content here.''')
+
     @classmethod
     def count_maildir_mails(cls, folder):
         """Returns the number of mails in maildir 'folder'
@@ -196,3 +229,22 @@ class OLITestLib():
             if dirpath.endswith(('/cur', '/new')):
                 mails += len(files)
         return boxes, mails
+
+    # find UID in a maildir filename
+    re_uidmatch = re.compile(',U=(\d+)')
+
+    @classmethod
+    def get_maildir_uids(cls, folder):
+        """Returns a list of maildir mail uids, 'None' if no valid uid"""
+        assert cls.testdir != None
+        mailfilepath = os.path.join(cls.testdir, 'mail', folder)
+        assert os.path.isdir(mailfilepath)
+        ret = []
+        for dirpath, dirs, files in os.walk(mailfilepath):
+            if not dirpath.endswith((os.path.sep + 'new', os.path.sep + 'cur')):
+                continue # only /new /cur are interesting
+            for file in files:
+                m = cls.re_uidmatch.search(file)
+                uid = m.group(1) if m else None
+                ret.append(uid)
+        return ret

test/tests/test_01_basic.py

@@ -31,6 +31,7 @@ def setUpModule():
 
 def tearDownModule():
     logging.info("Tear Down test module")
+    # comment out next line to keep testdir after test runs. TODO: make nicer
     OLITestLib.delete_test_dir()
 
 #Stuff that can be used
@@ -101,4 +102,27 @@ class TestBasicFunctions(unittest.TestCase):
         self.assertEqual(mismatch, True, msg="Mismatching nametrans rules did "
             "NOT trigger an 'infinite folder generation' error. Output was:\n"
              "{}".format(res))
+        # Write out default config file again
+        OLITestLib.write_config_file()
 
+    def test_04_createmail(self):
+        """Create mail in OLItest 1, sync, wipe folder sync
+
+        Currently, this will mean the folder will be recreated
+        locally.  At some point when remote folder deletion is
+        implemented, this behavior will change."""
+        OLITestLib.delete_remote_testfolders()
+        OLITestLib.create_maildir('INBOX.OLItest')
+        OLITestLib.create_mail('INBOX.OLItest')
+        code, res = OLITestLib.run_OLI()
+        #logging.warn("%s %s "% (code, res))
+        self.assertEqual(res, "")
+        boxes, mails = OLITestLib.count_maildir_mails('')
+        self.assertTrue((boxes, mails)==(1,1), msg="Expected 1 folders and 1 "
+            "mails, but sync led to {} folders and {} mails".format(
+                boxes, mails))
+        # The local Mail should have been assigned a proper UID now, check!
+        uids = OLITestLib.get_maildir_uids('INBOX.OLItest')
+        self.assertFalse (None in uids, msg = "All mails should have been "+ \
+            "assigned the IMAP's UID number, but {} messages had no valid ID "\
+            .format(len([None for x in uids if x==None])))