backport support for testing against storages other than `DemoStorage`...

backport support for testing against storages other than `DemoStorage` (r80357:80358) from Zope 2.11

doc/CHANGES.txt

@@ -6,6 +6,16 @@ Zope Changes
 
   Zope 2.10.10 (Unreleased)
 
+    Features added
+
+      - Testing/custom_zodb.py: added support use a different storage other
+        than DemoStorage. A dedicated FileStorage can be mount by setting the
+        $TEST_FILESTORAGE environment variable to a custom Data.fs file.  A 
+        ZEO server can be configured using the $TEST_ZEO_HOST and 
+        $TEST_ZEO_PORT environment variables. This new functionality allows us
+        to use the standard Zope testrunner for writing and running tests
+        against existing Zope installations.
+
     Bugs fixed
 
       - LP #360761 (backported from Acquisition trunk): fix iteration proxy

lib/python/Testing/custom_zodb.py

+
+import os
+import logging
 import ZODB
-from ZODB.DemoStorage import DemoStorage
 
-Storage = DemoStorage(quota=(1<<20))
+LOG = logging.getLogger('Testing')
+
+def getStorage():
+    """ Return a storage instance for running ZopeTestCase based 
+        tests. By default a DemoStorage is used. Setting
+        $TEST_ZEO_HOST/TEST_ZEO_PORT environment variables allows you
+        to use a ZEO server instead. A file storage can be configured
+        by settting the $TEST_FILESTORAGE environment variable.
+    """
+
+    get = os.environ.get
+
+    if os.environ.has_key('TEST_ZEO_HOST') and os.environ.has_key('TEST_ZEO_PORT'):
+        from ZEO.ClientStorage import ClientStorage
+        zeo_host = get('TEST_ZEO_HOST')
+        zeo_port = int(get('TEST_ZEO_PORT'))
+        LOG.info('Using ZEO server (%s:%d)' % (zeo_host, zeo_port))
+        return ClientStorage((zeo_host, zeo_port))
+
+    elif os.environ.has_key('TEST_FILESTORAGE'):
+        import ZODB.FileStorage
+        datafs = get('TEST_FILESTORAGE')
+        LOG.info('Using Filestorage at (%s)' % datafs)
+        return ZODB.FileStorage.FileStorage(datafs)
+
+    else:
+        from ZODB.DemoStorage import DemoStorage
+        LOG.info('Using DemoStorage')
+        return DemoStorage(quota=(1<<20))
+
+Storage = getStorage()