Added common setUp and tearDown for both doctests and unittest tests

to abort the current global transaction before and after each test and
to create a temporary test directory to run each test.

src/ZODB/tests/util.py

@@ -16,9 +16,40 @@
 $Id$
 """
 
+from ZODB.MappingStorage import DB
+
+import os
+import tempfile
 import time
+import unittest
 import persistent
-from ZODB.MappingStorage import DB
+import transaction
+import zope.testing.setupstack
+
+def setUp(test, name='test'):
+    transaction.abort()
+    d = tempfile.mkdtemp(prefix=name)
+    zope.testing.setupstack.register(test, zope.testing.setupstack.rmtree, d)
+    zope.testing.setupstack.register(
+        test, setattr, tempfile, 'tempdir', tempfile.tempdir)
+    tempfile.tempdir = d
+    zope.testing.setupstack.register(test, os.chdir, os.getcwd())
+    os.chdir(d)
+    zope.testing.setupstack.register(test, transaction.abort)
+
+tearDown = zope.testing.setupstack.tearDown
+
+class TestCase(unittest.TestCase):
+
+    def setUp(self):
+        self.globs = {}
+        name = self.__class__.__name__
+        mname = getattr(self, '_TestCase__testMethodName', '')
+        if mname:
+            name += '-' + mname
+        setUp(self, name)
+
+    tearDown = tearDown
 
 def pack(db):
     db.pack(time.time()+1)