1 files changed, 22 insertions, 0 deletions
diff --git a/jstests/inc2.js b/jstests/inc2.js
new file mode 100644
index 00000000000..75a8e65a384
--- /dev/null
+++ b/jstests/inc2.js
@@ -0,0 +1,22 @@
+
+t = db.inc2
+t.drop();
+
+t.save( { _id : 1 , x : 1 } );
+t.save( { _id : 2 , x : 2 } );
+t.save( { _id : 3 , x : 3 } );
+
+function order(){
+    return t.find().sort( { x : 1 } ).map( function(z){ return z._id; } );
+}
+
+assert.eq( "1,2,3" , order() , "A" );
+
+t.update( { _id : 1 } , { $inc : { x : 4 } } );
+assert.eq( "2,3,1" , order() , "B" );
+
+t.ensureIndex( { x : 1 } );
+assert.eq( "2,3,1" , order() , "C" );
+
+t.update( { _id : 3 } , { $inc : { x : 4 } } );
+assert.eq( "2,1,3" , order() , "D" );