From 5c45ae1f7b44c01b3cc7240f2529ebcd932a92ef Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Wed, 18 Apr 2012 18:13:31 +0200
Subject: [PATCH] Test SDIFF with first set empty.

---
 tests/unit/type/set.tcl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/unit/type/set.tcl b/tests/unit/type/set.tcl
index ec412b40..f4f28373 100644
--- a/tests/unit/type/set.tcl
+++ b/tests/unit/type/set.tcl
@@ -206,6 +206,13 @@ start_server {
         }
     }
 
+    test "SDIFF with first set empty" {
+        r del set1 set2 set3
+        r sadd set2 1 2 3 4
+        r sadd set3 a b c d
+        r sdiff set1 set2 set3
+    } {}
+
     test "SINTER against non-set should throw error" {
         r set key1 x
         assert_error "ERR*wrong kind*" {r sinter key1 noset}
-- 
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