From b1d5e1ef2377f7b7b4d3b0147a37ab9f0f403a6a Mon Sep 17 00:00:00 2001
From: Zhuohuan LI <zixia@zixia.net>
Date: Sun, 12 Jun 2016 02:34:51 +0800
Subject: [PATCH] pass all tests

---
 src/message.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/message.js b/src/message.js
index a7d4c8e8..ef2c0f35 100644
--- a/src/message.js
+++ b/src/message.js
@@ -72,7 +72,7 @@ class Message {
   }
   digestEmoji(str) {
     // <img class="emoji emoji1f4a4" text="[流汗]_web" src="/zh_CN/htmledition/v2/images/spacer.gif" />
-    return str
+    return str && str
     .replace(/<img class="\w*?emoji (\w*?emoji[^"]+?)" text="(.*?)_web" src=[^>]+>/g
       , '($1$2)')
   }
-- 
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