FEATURE: Publish read topic tracking events for private messages. (#14274)

Follow-up to fc1fd1b41689694b3916dc4e10605eb9b8bb89b7

spec/models/private_message_topic_tracking_state_spec.rb

@@ -203,4 +203,22 @@ describe PrivateMessageTopicTrackingState do
       expect(data['payload']['group_ids']).to contain_exactly(group.id)
     end
   end
+
+  describe '.publish_read' do
+    it 'should publish the right message_bus message' do
+      message = MessageBus.track_publish(described_class.user_channel(user.id)) do
+        PrivateMessageTopicTrackingState.publish_read(private_message.id, 1, user)
+      end.first
+
+      data = message.data
+
+      expect(message.user_ids).to contain_exactly(user.id)
+      expect(message.group_ids).to eq(nil)
+      expect(data["topic_id"]).to eq(private_message.id)
+      expect(data["message_type"]).to eq(described_class::READ_MESSAGE_TYPE)
+      expect(data["payload"]["last_read_post_number"]).to eq(1)
+      expect(data["payload"]["highest_post_number"]).to eq(1)
+      expect(data["payload"]["notification_level"]).to eq(nil)
+    end
+  end
 end

spec/models/topic_user_spec.rb

@@ -226,7 +226,14 @@ describe TopicUser do
         freeze_time tomorrow
 
         Fabricate(:post, topic: topic, user: user)
-        TopicUser.update_last_read(user, topic.id, 2, 1, 0)
+        channel = TopicTrackingState.unread_channel_key(user.id)
+
+        messages = MessageBus.track_publish(channel) do
+          TopicUser.update_last_read(user, topic.id, 2, 1, 0)
+        end
+
+        expect(messages.blank?).to eq(false)
+
         topic_user = TopicUser.get(topic, user)
 
         expect(topic_user.last_read_post_number).to eq(2)
@@ -270,6 +277,20 @@ describe TopicUser do
           .to eq(TopicUser.notification_levels[:regular])
       end
 
+      it 'should publish the right message_bus message' do
+        TopicUser.update_last_read(user, topic.id, 1, 1, 0)
+
+        Fabricate(:post, topic: topic, user: user)
+
+        channel = PrivateMessageTopicTrackingState.user_channel(user.id)
+
+        messages = MessageBus.track_publish(channel) do
+          TopicUser.update_last_read(user, topic.id, 2, 1, 0)
+        end
+
+        expect(messages.blank?).to eq(false)
+      end
+
       describe 'inviting a group' do
         let(:group) do
           Fabricate(:group,