1 files changed, 20 insertions, 0 deletions
diff --git a/jstests/core/indexq.js b/jstests/core/indexq.js
new file mode 100644
index 00000000000..38cd27b8798
--- /dev/null
+++ b/jstests/core/indexq.js
@@ -0,0 +1,20 @@
+// Test multikey range preference for a fully included range SERVER-958.
+
+t = db.jstests_indexq;
+t.drop();
+
+t.ensureIndex( {a:1} );
+// Single key index
+assert.eq( 5, t.find( {a:{$gt:4,$gte:5}} ).explain().indexBounds.a[ 0 ][ 0 ] );
+assert.eq( [[1,1],[2,2]], t.find( {a:{$in:[1,2,3]},$or:[{a:{$in:[1,2]}}]} ).explain().indexBounds.a );
+
+t.save( {a:[1,3]} );
+// Now with multi key index.
+
+// SERVER-12281: We should know that >4 is worse than >5
+// assert.eq( 5, t.find( {a:{$gt:4,$gte:5}} ).explain().indexBounds.a[ 0 ][ 0 ] );
+
+printjson(t.find( {a:{$in:[1,2,3]},$or:[{a:{$in:[1,2]}}]} ).explain())
+
+// SERVER-12281: We should know that in[1,2] is better than in[1,2,3].
+// assert.eq( [[1,1],[2,2]], t.find( {a:{$in:[1,2,3]},$or:[{a:{$in:[1,2]}}]} ).explain().indexBounds.a );