From 8ebb87792a93f9cbfeddb548512f7fd94fdce29a Mon Sep 17 00:00:00 2001
From: Thijs Cadier <thijs@appsignal.com>
Date: Sun, 23 Aug 2015 10:31:06 +0200
Subject: [PATCH] Add test for multiple queries with same fields object

---
 src/collection.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/collection.rs b/src/collection.rs
index 1851fcc..d510029 100644
--- a/src/collection.rs
+++ b/src/collection.rs
@@ -496,6 +496,13 @@ mod tests {
                 fields:      Some(fields),
                 read_prefs:  None
             };
+
+            // Query a couple of times to make sure the C driver keeps
+            // access to the fields bson object.
+            for _ in 0..5 {
+                collection.find(&query, Some(&options)).unwrap();
+            }
+
             let mut cursor = collection.find(&query, Some(&options)).unwrap();
             let next_document = cursor.next().unwrap().unwrap();
             assert!(next_document.contains_key("key_1"));