Fix bsddb.db.DBError derived exceptions so they can be unpickled.

Also adds some backwards compatibility when compiling _bsddb.c on earlier
python versions (needed for pybsddb).

2 files changed, 76 insertions, 0 deletions

diff --git a/Lib/bsddb/test/test_all.py b/Lib/bsddb/test/test_all.py
index 972cd06..abfaf47 100644
--- a/Lib/bsddb/test/test_all.py
+++ b/Lib/bsddb/test/test_all.py
@@ -65,6 +65,7 @@ def suite():
         'test_join',
         'test_lock',
         'test_misc',
+        'test_pickle',
         'test_queue',
         'test_recno',
         'test_thread',
diff --git a/Lib/bsddb/test/test_pickle.py b/Lib/bsddb/test/test_pickle.py
new file mode 100644
index 0000000..3916e5c
--- /dev/null
+++ b/Lib/bsddb/test/test_pickle.py
@@ -0,0 +1,75 @@
+
+import sys, os, string
+import pickle
+try:
+    import cPickle
+except ImportError:
+    cPickle = None
+import unittest
+import glob
+
+try:
+    # For Pythons w/distutils pybsddb
+    from bsddb3 import db
+except ImportError, e:
+    # For Python 2.3
+    from bsddb import db
+
+
+#----------------------------------------------------------------------
+
+class pickleTestCase(unittest.TestCase):
+    """Verify that DBError can be pickled and unpickled"""
+    db_home = 'db_home'
+    db_name = 'test-dbobj.db'
+
+    def setUp(self):
+        homeDir = os.path.join(os.path.dirname(sys.argv[0]), 'db_home')
+        self.homeDir = homeDir
+        try: os.mkdir(homeDir)
+        except os.error: pass
+
+    def tearDown(self):
+        if hasattr(self, 'db'):
+            del self.db
+        if hasattr(self, 'env'):
+            del self.env
+        files = glob.glob(os.path.join(self.homeDir, '*'))
+        for file in files:
+            os.remove(file)
+
+    def _base_test_pickle_DBError(self, pickle):
+        self.env = db.DBEnv()
+        self.env.open(self.homeDir, db.DB_CREATE | db.DB_INIT_MPOOL)
+        self.db = db.DB(self.env)
+        self.db.open(self.db_name, db.DB_HASH, db.DB_CREATE)
+        self.db.put('spam', 'eggs')
+        assert self.db['spam'] == 'eggs'
+        try:
+            self.db.put('spam', 'ham', flags=db.DB_NOOVERWRITE)
+        except db.DBError, egg:
+            pickledEgg = pickle.dumps(egg)
+            #print repr(pickledEgg)
+            rottenEgg = pickle.loads(pickledEgg)
+            if rottenEgg.args != egg.args or type(rottenEgg) != type(egg):
+                raise Exception, (rottenEgg, '!=', egg)
+        else:
+            raise Exception, "where's my DBError exception?!?"
+
+        self.db.close()
+        self.env.close()
+
+    def test01_pickle_DBError(self):
+        self._base_test_pickle_DBError(pickle=pickle)
+
+    if cPickle:
+        def test02_cPickle_DBError(self):
+            self._base_test_pickle_DBError(pickle=cPickle)
+
+#----------------------------------------------------------------------
+
+def test_suite():
+    return unittest.makeSuite(pickleTestCase)
+
+if __name__ == '__main__':
+    unittest.main(defaultTest='test_suite')