support find uid by multiple seqno

lib/imap.utilities.js

@@ -368,8 +368,9 @@ exports.buildSearchQuery = function(options, extensions, isOrChild) {
           try {
             // last hope it's a seqno set
             // http://tools.ietf.org/html/rfc3501#section-6.4.4
-            exports.validateUIDList([criteria]);
-            searchargs += modifier + criteria;
+            var seqnos = (args ? [criteria].concat(args) : [criteria]);
+            exports.validateUIDList([seqnos]);
+            searchargs += modifier + seqnos.join(',');
           } catch(e) {
             throw new Error('Unexpected search option: ' + criteria);
           }
@@ -378,6 +379,7 @@ exports.buildSearchQuery = function(options, extensions, isOrChild) {
     if (isOrChild)
       break;
   }
+  console.log(searchargs);
   return searchargs;
 }
 

test/test-seqno-serach.js

@@ -0,0 +1,20 @@
+var ImapConnection = require("../lib/imap").ImapConnection,
+    imap = new ImapConnection({
+      username: "pingkitnet@gmail.com",
+      password: "ping5555566666",
+      host: "imap.gmail.com",
+      port: 993,
+      secure: true
+    });
+
+
+imap.connect(function() {
+  imap.openBox('INBOX', false, function() {
+    //find uid by seqno
+    imap.search([["1:5", "8:10"]], function(e, results) {
+      console.log(e, results);
+      imap.logout();
+    });
+  })
+});
+