SERVER-4954 Dropping a database of a sharded cluster that contains regex characters will not cleanup config docs

More detail explanation of cause:
When DBConfig::dropDatabase gets called, it will then call _dropShardedCollections. However, the collections that will get cleaned up is based from the _collections member variable, which is prepopulated with unescaped regex query at _load.

1 files changed, 6 insertions, 0 deletions

diff --git a/jstests/sharding/shard_with_special_db_names.js b/jstests/sharding/shard_with_special_db_names.js
index de46a0ef9ac..14ba12e6ea5 100644
--- a/jstests/sharding/shard_with_special_db_names.js
+++ b/jstests/sharding/shard_with_special_db_names.js
@@ -16,5 +16,11 @@ s.adminCommand( { shardcollection :  specialNS, key : { num : 1 } } );
 var exists = s.getDB("config").collections.find( { _id: specialNS } ).count();
 assert.eq( exists, 1 );
 
+// Test that drop database properly cleans up config
+s.getDB(specialDB).dropDatabase();
+
+exists = s.getDB(specialDB).collections.find( { _id: specialNS } ).count();
+assert.eq( exists, 0 );
+
 })();