Properly dispatch unbind requests

Fix mcavage/node-ldapjs#197

lib/server.js

@@ -795,16 +795,17 @@ Server.prototype._getHandlerChain = function _getHandlerChain(req, res) {
     }
   } else if (req.protocolOp === Protocol.LDAP_REQ_UNBIND) {
     route = routes['unbind'];
-    return {
-      backend: route ? route.backend : self,
-      handlers: function getUnbindChain() {
-        if (route && route[op])
-          return route[op];
-
-        self.log.debug('%s unbind request %j', req.logId, req.json);
-        return [defaultNoOpHandler];
-      }
-    };
+    if (route) {
+      return {
+        backend: route.backend,
+        handlers: route[op]
+      };
+    } else {
+      return {
+        backend: self,
+        handlers: [defaultNoOpHandler]
+      };
+    }
   } else if (req.protocolOp === Protocol.LDAP_REQ_ABANDON) {
     return {
       backend: self,

test/server.test.js

@@ -169,3 +169,28 @@ test('route absent', function (t) {
     });
   });
 });
+
+test('route unbind', function (t) {
+  t.plan(4);
+  server = ldap.createServer();
+  sock = getSock();
+
+  server.unbind(function (req, res, next) {
+    t.ok(true, 'server unbind successful');
+    res.end();
+    return next();
+  });
+
+  server.listen(sock, function () {
+    t.ok(true, 'server startup');
+    client = ldap.createClient({ socketPath: sock });
+    client.bind('', '', function (err) {
+      t.ifError(err, 'client bind error');
+      client.unbind(function (err) {
+        t.ifError(err, 'client unbind error');
+        server.close();
+        t.end();
+      });
+    });
+  });
+});