1 files changed, 24 insertions, 0 deletions
diff --git a/jstests/explain1.js b/jstests/explain1.js
new file mode 100644
index 00000000000..6d5ac55b9c3
--- /dev/null
+++ b/jstests/explain1.js
@@ -0,0 +1,24 @@
+
+t = db.explain1;
+t.drop();
+
+for ( var i=0; i<100; i++ ){
+    t.save( { x : i } );
+}
+
+q = { x : { $gt : 50 } };
+
+assert.eq( 49 , t.find( q ).count() , "A" );
+assert.eq( 49 , t.find( q ).itcount() , "B" );
+assert.eq( 20 , t.find( q ).limit(20).itcount() , "C" );
+
+t.ensureIndex( { x : 1 } );
+
+assert.eq( 49 , t.find( q ).count() , "D" );
+assert.eq( 49 , t.find( q ).itcount() , "E" );
+assert.eq( 20 , t.find( q ).limit(20).itcount() , "F" );
+
+assert.eq( 49 , t.find(q).explain().n , "G" );
+assert.eq( 20 , t.find(q).limit(20).explain().n , "H" );
+assert.eq( 49 , t.find(q).limit(-20).explain().n , "I" );
+