closes #5516

src/topics/unread.js

@@ -206,7 +206,7 @@ module.exports = function (Topics) {
 	Topics.markAsRead = function (tids, uid, callback) {
 		callback = callback || function () {};
 		if (!Array.isArray(tids) || !tids.length) {
-			return callback();
+			return setImmediate(callback, null, false);
 		}
 
 		tids = tids.filter(function (tid, index, array) {
@@ -214,7 +214,7 @@ module.exports = function (Topics) {
 		});
 
 		if (!tids.length) {
-			return callback(null, false);
+			return setImmediate(callback, null, false);
 		}
 
 		async.waterfall([

test/topics.js

@@ -1181,6 +1181,14 @@ describe('Topic\'s', function () {
 				});
 			});
 		});
+
+		it('should not do anything if tids is empty array', function (done) {
+			socketTopics.markAsRead({ uid: adminUid }, [], function (err, markedRead) {
+				assert.ifError(err);
+				assert(!markedRead);
+				done();
+			});
+		});
 	});
 
 	describe('tags', function () {