Make message_list.js work like the other modules.

frontend_tests/node_tests/message_list.js

@@ -19,7 +19,7 @@ set_global('$', function () {
 
 set_global('feature_flags', {});
 
-var MessageList = require('js/message_list');
+var MessageList = require('js/message_list').MessageList;
 
 (function test_basics() {
     var table;

static/js/message_list.js

@@ -1,5 +1,9 @@
 /*jslint nomen: true */
-function MessageList(table_name, filter, opts) {
+var message_list = (function () {
+
+var exports = {};
+
+exports.MessageList = function (table_name, filter, opts) {
     _.extend(this, {
         collapse_messages: true,
         muting_enabled: true
@@ -25,11 +29,9 @@ function MessageList(table_name, filter, opts) {
     this.num_appends = 0;
 
     return this;
-}
+};
 
-(function () {
-
-MessageList.prototype = {
+exports.MessageList.prototype = {
     add_messages: function MessageList_add_messages(messages, opts) {
         var self = this;
         var predicate = self.filter.predicate();
@@ -627,8 +629,11 @@ MessageList.prototype = {
 $(document).on('message_selected.zulip hashchange.zulip mousewheel', function (event) {
     viewport.stop_auto_scrolling();
 });
+
+return exports;
+
 }());
 /*jslint nomen: false */
 if (typeof module !== 'undefined') {
-    module.exports = MessageList;
+    module.exports = message_list;
 }

static/js/narrow.js

@@ -244,7 +244,7 @@ exports.activate = function (raw_operators, opts) {
         home_msg_list.pre_narrow_offset = page_params.initial_offset;
     }
 
-    var msg_list = new MessageList('zfilt', current_filter, {
+    var msg_list = new message_list.MessageList('zfilt', current_filter, {
         collapse_messages: ! current_filter.is_search(),
         muting_enabled: muting_enabled
     });

static/js/zulip.js

@@ -1,8 +1,8 @@
-var all_msg_list = new MessageList(
+var all_msg_list = new message_list.MessageList(
     undefined, undefined,
     {muting_enabled: false}
 );
-var home_msg_list = new MessageList('zhome',
+var home_msg_list = new message_list.MessageList('zhome',
     new Filter([{operator: "in", operand: "home"}]), {muting_enabled: true}
 );
 var narrowed_msg_list;

tools/jslint/check-all.js

@@ -24,7 +24,7 @@ var globals =
     // Modules, defined in their respective files.
     + ' compose compose_fade rows hotkeys narrow reload search subs pointer'
     + ' composebox_typeahead server_events typeahead_helper notifications hashchange'
-    + ' invite ui viewport util activity timerender MessageList MessageListView blueslip unread stream_list'
+    + ' invite ui viewport util activity timerender message_list MessageListView blueslip unread stream_list'
     + ' message_edit tab_bar emoji popovers navigate people settings alert_words_ui message_store'
     + ' avatar feature_flags search_suggestion referral stream_color Dict'
     + ' Filter summary admin stream_data muting WinChan muting_ui Socket channel gear_menu'