[soc2010/query-refactor] Ensure that calling close() doesn't blow up if a connection was never opened.

git-svn-id: http://code.djangoproject.com/svn/django/branches/soc2010/query-refactor@13432 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/mongodb/base.py

@@ -76,6 +76,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
         return self.connection[self.settings_dict["NAME"]]
 
     def close(self):
+        if self._connection is not None:
             self._connection.disconnect()
             self._connection = None
     

tests/regressiontests/mongodb/tests.py

@@ -1,3 +1,4 @@
+from django.db import connection
 from django.db.models import Count, F
 from django.test import TestCase
 
@@ -337,3 +338,8 @@ class MongoTestCase(TestCase):
             ],
             lambda g: g.name,
         )
+    
+    def test_close(self):
+        # Ensure that closing a connection that was never established doesn't
+        # blow up.
+        connection.close()