node tests: Add tests for message_list_data.

frontend_tests/node_tests/message_list_data.js

@@ -0,0 +1,113 @@
+zrequire('unread');
+zrequire('util');
+
+zrequire('Filter', 'js/filter');
+zrequire('MessageListData', 'js/message_list_data');
+
+set_global('page_params', {});
+set_global('blueslip', global.make_zblueslip());
+
+global.patch_builtin('setTimeout', (f, delay) => {
+    assert.equal(delay, 0);
+    return f();
+});
+
+function make_msg(msg_id) {
+    return {
+        id: msg_id,
+        unread: true,
+    };
+}
+
+function make_msgs(msg_ids) {
+    return _.map(msg_ids, make_msg);
+}
+
+(function test_basics() {
+    const mld = new MessageListData({
+        muting_enabled: false,
+        filter: undefined,
+    });
+
+    assert.equal(mld.is_search(), false);
+
+    mld.add(make_msgs([35, 25, 15, 45]));
+
+    function assert_contents(msg_ids) {
+        const msgs = mld.all_messages();
+        assert.deepEqual(msgs, make_msgs(msg_ids));
+    }
+    assert_contents([15, 25, 35, 45]);
+
+    const new_msgs = make_msgs([10, 20, 30, 40, 50, 60, 70]);
+    const info = mld.triage_messages(new_msgs);
+
+    assert.deepEqual(info, {
+        top_messages: make_msgs([10]),
+        interior_messages: make_msgs([20, 30, 40]),
+        bottom_messages: make_msgs([50, 60, 70]),
+    });
+
+    mld.prepend(info.top_messages);
+    mld.append(info.bottom_messages);
+
+    assert_contents([10, 15, 25, 35, 45, 50, 60, 70]);
+
+    mld.add(info.interior_messages);
+
+    assert_contents([10, 15, 20, 25, 30, 35, 40, 45, 50, 60, 70]);
+
+    assert.equal(mld.selected_id(), -1);
+    assert.equal(mld.closest_id(8), 10);
+    assert.equal(mld.closest_id(27), 25);
+    assert.equal(mld.closest_id(72), 70);
+
+    mld.set_selected_id(50);
+    assert.equal(mld.selected_id(), 50);
+    assert.equal(mld.selected_idx(), 8);
+
+    mld.remove([mld.get(50)]);
+    assert_contents([10, 15, 20, 25, 30, 35, 40, 45, 60, 70]);
+
+    mld.update_items_for_muting();
+    assert_contents([10, 15, 20, 25, 30, 35, 40, 45, 60, 70]);
+
+    mld.reset_select_to_closest();
+    assert.equal(mld.selected_id(), 45);
+    assert.equal(mld.selected_idx(), 7);
+
+    assert.equal(mld.first_unread_message_id(), 10);
+    mld.get(10).unread = false;
+    assert.equal(mld.first_unread_message_id(), 15);
+
+
+    mld.clear();
+    assert_contents([]);
+    assert.equal(mld.closest_id(99), -1);
+    assert.equal(mld.get_last_message_sent_by_me(), undefined);
+
+    mld.add(make_msgs([120, 125.01, 130, 140]));
+    assert_contents([120, 125.01, 130, 140]);
+    mld.set_selected_id(125.01);
+    assert.equal(mld.selected_id(), 125.01);
+
+    mld.get(125.01).id = 145;
+    mld.change_message_id(125.01, 145, {
+        re_render: () => {},
+    });
+    assert_contents([120, 130, 140, 145]);
+
+    _.each(mld.all_messages(), (msg) => {
+        msg.unread = false;
+    });
+
+    assert.equal(mld.first_unread_message_id(), 145);
+}());
+
+(function test_errors() {
+    const mld = new MessageListData({
+        muting_enabled: false,
+        filter: undefined,
+    });
+    assert.equal(mld.get('bogus-id'), undefined);
+}());