Function paths

backend/src/git/activity.rs:1393–1412

()

        #[test]
        fn paths() {
            let topic1 = topic("Climate change");
            let topic2 = topic("Climate");
            let topic3 = topic("Weather");

            let change = Change::UpdateTopicParentTopics(UpdateTopicParentTopics {
                actor_id: "2".to_owned(),
                added_parent_topics: TopicInfoList::from(&topic2),
                date: chrono::Utc::now(),
                id: Change::new_id(),
                parent_topic_ids: BTreeSet::from([topic3.topic_id().to_owned()]),
                removed_parent_topics: TopicInfoList::new(),
                updated_topic: TopicInfo::from(&topic1),
            });

            assert_eq!(
                change.ids(),
                HashSet::from([topic1.topic_id(), topic2.topic_id(), topic3.topic_id()])
            );
        }
    }

    mod update_topic_synonyms {