Function delete_topic

backend/src/git/activity.rs:1337–1361

()

    #[test]
    fn delete_topic() {
        let link = link("Reddit", "http://www.reddit.com");
        let topic1 = topic("Climate change");
        let topic2 = topic("Weather");

        let change = Change::DeleteTopic(DeleteTopic {
            actor_id: "2".to_owned(),
            child_links: LinkInfoList(BTreeSet::from([LinkInfo::from(&link)])),
            child_topics: TopicInfoList(BTreeSet::new()),
            date: chrono::Utc::now(),
            deleted_topic: TopicInfo::from(&topic1),
            id: Change::new_id(),
            parent_topics: TopicInfoList(BTreeSet::from([TopicInfo::from(&topic2)])),
        });

        assert_eq!(
            change.markdown(Locale::EN, "Gnusto", None),
            format!(
                "Gnusto deleted [Climate change]({}), removing [Reddit](http://www.reddit.com) from it, and \
                removing it from [Weather]({})",
                topic1.relative_url(),
                topic2.relative_url(),
            )
        );
    }

    mod update_topic_parent_topics {
        use super::*;