src/lib.rs

@@ -423,9 +423,9 @@ macro_rules! artist_multi_url_dispatch {
 }
 
 impl Artist {
-    pub fn new(id: ArtistId) -> Self {
+    pub fn new<ID: Into<ArtistId>>(id: ID) -> Self {
         Artist {
-            id,
+            id: id.into(),
             properties: ArtistProperties::default(),
             albums: vec![],
         }
@@ -1068,6 +1068,18 @@ mod tests {
 
     use super::*;
 
+    static MUSICBRAINZ: &'static str =
+        "https://musicbrainz.org/artist/d368baa8-21ca-4759-9731-0b2753071ad8";
+    static MUSICBRAINZ_2: &'static str =
+        "https://musicbrainz.org/artist/823869a5-5ded-4f6b-9fb7-2a9344d83c6b";
+    static MUSICBUTLER: &'static str = "https://www.musicbutler.io/artist-page/483340948";
+    static MUSICBUTLER_2: &'static str = "https://www.musicbutler.io/artist-page/658903042/";
+    static BANDCAMP: &'static str = "https://thelasthangmen.bandcamp.com/";
+    static BANDCAMP_2: &'static str = "https://viciouscrusade.bandcamp.com/";
+    static QOBUZ: &'static str = "https://www.qobuz.com/nl-nl/interpreter/the-last-hangmen/1244413";
+    static QOBUZ_2: &'static str =
+        "https://www.qobuz.com/nl-nl/interpreter/vicious-crusade/7522386";
+
     pub static COLLECTION: Lazy<Vec<Artist>> = Lazy::new(|| collection!());
 
     pub fn artist_to_items(artist: &Artist) -> Vec<Item> {
@@ -1139,30 +1151,572 @@ mod tests {
 
     #[test]
     fn urls() {
-        let musicbrainz = "https://musicbrainz.org/artist/d368baa8-21ca-4759-9731-0b2753071ad8";
-        let musicbutler = "https://www.musicbutler.io/artist-page/483340948";
-        let bandcamp = "https://thelasthangmen.bandcamp.com/";
-        let qobuz = "https://www.qobuz.com/nl-nl/interpreter/the-last-hangmen/1244413";
+        assert!(MusicBrainz::new(MUSICBRAINZ).is_ok());
+        assert!(MusicBrainz::new(MUSICBUTLER).is_err());
+        assert!(MusicBrainz::new(BANDCAMP).is_err());
+        assert!(MusicBrainz::new(QOBUZ).is_err());
 
-        assert!(MusicBrainz::new(musicbrainz).is_ok());
-        assert!(MusicBrainz::new(musicbutler).is_err());
-        assert!(MusicBrainz::new(bandcamp).is_err());
-        assert!(MusicBrainz::new(qobuz).is_err());
+        assert!(MusicButler::new(MUSICBRAINZ).is_err());
+        assert!(MusicButler::new(MUSICBUTLER).is_ok());
+        assert!(MusicButler::new(BANDCAMP).is_err());
+        assert!(MusicButler::new(QOBUZ).is_err());
 
-        assert!(MusicButler::new(musicbrainz).is_err());
-        assert!(MusicButler::new(musicbutler).is_ok());
-        assert!(MusicButler::new(bandcamp).is_err());
-        assert!(MusicButler::new(qobuz).is_err());
+        assert!(Bandcamp::new(MUSICBRAINZ).is_err());
+        assert!(Bandcamp::new(MUSICBUTLER).is_err());
+        assert!(Bandcamp::new(BANDCAMP).is_ok());
+        assert!(Bandcamp::new(QOBUZ).is_err());
 
-        assert!(Bandcamp::new(musicbrainz).is_err());
-        assert!(Bandcamp::new(musicbutler).is_err());
-        assert!(Bandcamp::new(bandcamp).is_ok());
-        assert!(Bandcamp::new(qobuz).is_err());
+        assert!(Qobuz::new(MUSICBRAINZ).is_err());
+        assert!(Qobuz::new(MUSICBUTLER).is_err());
+        assert!(Qobuz::new(BANDCAMP).is_err());
+        assert!(Qobuz::new(QOBUZ).is_ok());
+    }
 
-        assert!(Qobuz::new(musicbrainz).is_err());
-        assert!(Qobuz::new(musicbutler).is_err());
-        assert!(Qobuz::new(bandcamp).is_err());
-        assert!(Qobuz::new(qobuz).is_ok());
+    #[test]
+    fn artist_new_delete() {
+        let artist_id = ArtistId::new("an artist");
+        let artist_id_2 = ArtistId::new("another artist");
+        let mut music_hoard = MusicHoard::<NoLibrary, NoDatabase>::new(None, None);
+
+        assert!(music_hoard.new_artist(&artist_id).is_ok());
+
+        let actual_err = music_hoard.new_artist(&artist_id).unwrap_err();
+        let expected_err = Error::CollectionError(String::from(
+            "artist 'an artist' is already in the collection",
+        ));
+        assert_eq!(actual_err, expected_err);
+        assert_eq!(actual_err.to_string(), expected_err.to_string());
+
+        let actual_err = music_hoard.delete_artist(&artist_id_2).unwrap_err();
+        let expected_err = Error::CollectionError(String::from(
+            "artist 'another artist' is not in the collection",
+        ));
+        assert_eq!(actual_err, expected_err);
+        assert_eq!(actual_err.to_string(), expected_err.to_string());
+
+        assert!(music_hoard.delete_artist(&artist_id).is_ok());
+    }
+
+    #[test]
+    fn artist_musicbrainz_url() {
+        let artist_id = ArtistId::new("an artist");
+        let artist_id_2 = ArtistId::new("another artist");
+        let mut music_hoard = MusicHoard::<NoLibrary, NoDatabase>::new(None, None);
+
+        assert!(music_hoard.new_artist(&artist_id).is_ok());
+
+        let mut expected: Option<MusicBrainz> = None;
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Adding incorect URL is an error.
+        assert!(music_hoard
+            .add_musicbrainz_url(&artist_id, MUSICBUTLER)
+            .is_err());
+        assert!(music_hoard
+            .add_musicbrainz_url(&artist_id, BANDCAMP)
+            .is_err());
+        assert!(music_hoard.add_musicbrainz_url(&artist_id, QOBUZ).is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Adding URL to an artist not in the collection is an error.
+        assert!(music_hoard
+            .add_musicbrainz_url(&artist_id_2, MUSICBRAINZ)
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Adding URL to artist.
+        assert!(music_hoard
+            .add_musicbrainz_url(&artist_id, MUSICBRAINZ)
+            .is_ok());
+        _ = expected.insert(MusicBrainz::new(MUSICBRAINZ).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Adding further URLs is an error.
+        assert!(music_hoard
+            .add_musicbrainz_url(&artist_id, MUSICBRAINZ)
+            .is_err());
+        assert!(music_hoard
+            .add_musicbrainz_url(&artist_id, MUSICBRAINZ_2)
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Removing a URL from an artist not in the collection is an error.
+        assert!(music_hoard
+            .remove_musicbrainz_url(&artist_id_2, MUSICBRAINZ)
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Removing a URL is only okay if it matches the stored one.
+        assert!(music_hoard
+            .remove_musicbrainz_url(&artist_id, MUSICBRAINZ_2)
+            .is_err());
+        assert!(music_hoard
+            .remove_musicbrainz_url(&artist_id, MUSICBRAINZ)
+            .is_ok());
+        _ = expected.take();
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Removing a URl if one does not exist is an error.
+        assert!(music_hoard
+            .remove_musicbrainz_url(&artist_id, MUSICBRAINZ)
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Setting an incorrect URL is an error.
+        assert!(music_hoard
+            .set_musicbrainz_url(&artist_id, MUSICBUTLER)
+            .is_err());
+        assert!(music_hoard
+            .set_musicbrainz_url(&artist_id, BANDCAMP)
+            .is_err());
+        assert!(music_hoard.set_musicbrainz_url(&artist_id, QOBUZ).is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Setting a URL on an artist not in the collection is an error.
+        assert!(music_hoard
+            .set_musicbrainz_url(&artist_id_2, MUSICBRAINZ)
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Setting a URL on an artist.
+        assert!(music_hoard
+            .set_musicbrainz_url(&artist_id, MUSICBRAINZ)
+            .is_ok());
+        _ = expected.insert(MusicBrainz::new(MUSICBRAINZ).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        assert!(music_hoard
+            .set_musicbrainz_url(&artist_id, MUSICBRAINZ)
+            .is_ok());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        assert!(music_hoard
+            .set_musicbrainz_url(&artist_id, MUSICBRAINZ_2)
+            .is_ok());
+        _ = expected.insert(MusicBrainz::new(MUSICBRAINZ_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Clearing URLs on an artist that does not exist is an error.
+        assert!(music_hoard.clear_musicbrainz_url(&artist_id_2).is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        // Clearing URLs.
+        assert!(music_hoard.clear_musicbrainz_url(&artist_id).is_ok());
+        _ = expected.take();
+        assert_eq!(music_hoard.collection[0].properties.musicbrainz, expected);
+
+        assert!(music_hoard.delete_artist(&artist_id).is_ok());
+    }
+
+    #[test]
+    fn artist_musicbutler_urls() {
+        let artist_id = ArtistId::new("an artist");
+        let artist_id_2 = ArtistId::new("another artist");
+        let mut music_hoard = MusicHoard::<NoLibrary, NoDatabase>::new(None, None);
+
+        assert!(music_hoard.new_artist(&artist_id).is_ok());
+
+        let mut expected: Vec<MusicButler> = vec![];
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // If any URL is incorrect adding URLs is an error.
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBRAINZ, MUSICBRAINZ_2])
+            .is_err());
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![BANDCAMP, BANDCAMP_2])
+            .is_err());
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![QOBUZ, QOBUZ_2])
+            .is_err());
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBRAINZ, MUSICBUTLER, BANDCAMP, QOBUZ])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Adding URLs to an artist not in the collection is an error.
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id_2, vec![MUSICBUTLER])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Adding a URL.
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBUTLER])
+            .is_ok());
+        expected.push(MusicButler::new(MUSICBUTLER).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Adding a URL that already exists is an error.
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBUTLER])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Adding another URL.
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBUTLER_2])
+            .is_ok());
+        expected.push(MusicButler::new(MUSICBUTLER_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBUTLER_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Removing URLs to an artist not in the collection is an error.
+        assert!(music_hoard
+            .remove_musicbutler_urls(&artist_id_2, vec![MUSICBUTLER])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Removing a URL.
+        assert!(music_hoard
+            .remove_musicbutler_urls(&artist_id, vec![MUSICBUTLER])
+            .is_ok());
+        expected.retain(|url| url.as_ref() != MUSICBUTLER);
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // If any URL does not exist removing URLs is an error.
+        assert!(music_hoard
+            .remove_musicbutler_urls(&artist_id, vec![MUSICBUTLER])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        assert!(music_hoard
+            .remove_musicbutler_urls(&artist_id, vec![MUSICBUTLER, MUSICBUTLER_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // If any URL already exists exists adding URLs is an error.
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBUTLER, MUSICBUTLER_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Removing a URL.
+        assert!(music_hoard
+            .remove_musicbutler_urls(&artist_id, vec![MUSICBUTLER_2])
+            .is_ok());
+        expected.retain(|url| url.as_ref() != MUSICBUTLER_2);
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        assert!(music_hoard
+            .remove_musicbutler_urls(&artist_id, vec![MUSICBUTLER_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Adding mutliple URLs is okay if none of them already exist.
+        assert!(music_hoard
+            .add_musicbutler_urls(&artist_id, vec![MUSICBUTLER, MUSICBUTLER_2])
+            .is_ok());
+        expected.push(MusicButler::new(MUSICBUTLER).unwrap());
+        expected.push(MusicButler::new(MUSICBUTLER_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Removing multiple URLs is okay if they all exist.
+        assert!(music_hoard
+            .remove_musicbutler_urls(&artist_id, vec![MUSICBUTLER, MUSICBUTLER_2])
+            .is_ok());
+        expected.clear();
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // If any URL is incorrect setting URLs is an error.
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id, vec![MUSICBRAINZ, MUSICBRAINZ_2])
+            .is_err());
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id, vec![BANDCAMP, BANDCAMP_2])
+            .is_err());
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id, vec![QOBUZ, QOBUZ_2])
+            .is_err());
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id, vec![MUSICBRAINZ, MUSICBUTLER, BANDCAMP, QOBUZ])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Seting URL on an artist not in the collection is an error.
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id_2, vec![MUSICBUTLER])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Set URLs.
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id, vec![MUSICBUTLER])
+            .is_ok());
+        expected.push(MusicButler::new(MUSICBUTLER).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id, vec![MUSICBUTLER_2])
+            .is_ok());
+        expected.clear();
+        expected.push(MusicButler::new(MUSICBUTLER_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        assert!(music_hoard
+            .set_musicbutler_urls(&artist_id, vec![MUSICBUTLER, MUSICBUTLER_2])
+            .is_ok());
+        expected.clear();
+        expected.push(MusicButler::new(MUSICBUTLER).unwrap());
+        expected.push(MusicButler::new(MUSICBUTLER_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+
+        // Clearing URLs on an artist that does not exist is an error.
+        assert!(music_hoard.clear_musicbutler_urls(&artist_id_2).is_err());
+
+        // Clear URLs.
+        assert!(music_hoard.clear_musicbutler_urls(&artist_id).is_ok());
+        expected.clear();
+        assert_eq!(music_hoard.collection[0].properties.musicbutler, expected);
+    }
+
+    #[test]
+    fn artist_bandcamp_urls() {
+        let artist_id = ArtistId::new("an artist");
+        let artist_id_2 = ArtistId::new("another artist");
+        let mut music_hoard = MusicHoard::<NoLibrary, NoDatabase>::new(None, None);
+
+        assert!(music_hoard.new_artist(&artist_id).is_ok());
+
+        let mut expected: Vec<Bandcamp> = vec![];
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // If any URL is incorrect adding URLs is an error.
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![MUSICBRAINZ, MUSICBRAINZ_2])
+            .is_err());
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![MUSICBUTLER, MUSICBUTLER_2])
+            .is_err());
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![QOBUZ, QOBUZ_2])
+            .is_err());
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![MUSICBRAINZ, MUSICBUTLER, BANDCAMP, QOBUZ])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Adding URLs to an artist not in the collection is an error.
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id_2, vec![BANDCAMP])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Adding a URL.
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![BANDCAMP])
+            .is_ok());
+        expected.push(Bandcamp::new(BANDCAMP).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Adding a URL that already exists is an error.
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![BANDCAMP])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Adding another URL.
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![BANDCAMP_2])
+            .is_ok());
+        expected.push(Bandcamp::new(BANDCAMP_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![BANDCAMP_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Removing URLs to an artist not in the collection is an error.
+        assert!(music_hoard
+            .remove_bandcamp_urls(&artist_id_2, vec![BANDCAMP])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Removing a URL.
+        assert!(music_hoard
+            .remove_bandcamp_urls(&artist_id, vec![BANDCAMP])
+            .is_ok());
+        expected.retain(|url| url.as_ref() != BANDCAMP);
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // If any URL does not exist removing URLs is an error.
+        assert!(music_hoard
+            .remove_bandcamp_urls(&artist_id, vec![BANDCAMP])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        assert!(music_hoard
+            .remove_bandcamp_urls(&artist_id, vec![BANDCAMP, BANDCAMP_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // If any URL already exists exists adding URLs is an error.
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![BANDCAMP, BANDCAMP_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Removing a URL.
+        assert!(music_hoard
+            .remove_bandcamp_urls(&artist_id, vec![BANDCAMP_2])
+            .is_ok());
+        expected.retain(|url| url.as_ref() != BANDCAMP_2);
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        assert!(music_hoard
+            .remove_bandcamp_urls(&artist_id, vec![BANDCAMP_2])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Adding mutliple URLs is okay if none of them already exist.
+        assert!(music_hoard
+            .add_bandcamp_urls(&artist_id, vec![BANDCAMP, BANDCAMP_2])
+            .is_ok());
+        expected.push(Bandcamp::new(BANDCAMP).unwrap());
+        expected.push(Bandcamp::new(BANDCAMP_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Removing multiple URLs is okay if they all exist.
+        assert!(music_hoard
+            .remove_bandcamp_urls(&artist_id, vec![BANDCAMP, BANDCAMP_2])
+            .is_ok());
+        expected.clear();
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // If any URL is incorrect setting URLs is an error.
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id, vec![MUSICBRAINZ, MUSICBRAINZ_2])
+            .is_err());
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id, vec![MUSICBUTLER, MUSICBUTLER_2])
+            .is_err());
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id, vec![QOBUZ, QOBUZ_2])
+            .is_err());
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id, vec![MUSICBRAINZ, MUSICBUTLER, BANDCAMP, QOBUZ])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Seting URL on an artist not in the collection is an error.
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id_2, vec![BANDCAMP])
+            .is_err());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Set URLs.
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id, vec![BANDCAMP])
+            .is_ok());
+        expected.push(Bandcamp::new(BANDCAMP).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id, vec![BANDCAMP_2])
+            .is_ok());
+        expected.clear();
+        expected.push(Bandcamp::new(BANDCAMP_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        assert!(music_hoard
+            .set_bandcamp_urls(&artist_id, vec![BANDCAMP, BANDCAMP_2])
+            .is_ok());
+        expected.clear();
+        expected.push(Bandcamp::new(BANDCAMP).unwrap());
+        expected.push(Bandcamp::new(BANDCAMP_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+
+        // Clearing URLs on an artist that does not exist is an error.
+        assert!(music_hoard.clear_bandcamp_urls(&artist_id_2).is_err());
+
+        // Clear URLs.
+        assert!(music_hoard.clear_bandcamp_urls(&artist_id).is_ok());
+        expected.clear();
+        assert_eq!(music_hoard.collection[0].properties.bandcamp, expected);
+    }
+
+    #[test]
+    fn artist_qobuz_url() {
+        let artist_id = ArtistId::new("an artist");
+        let artist_id_2 = ArtistId::new("another artist");
+        let mut music_hoard = MusicHoard::<NoLibrary, NoDatabase>::new(None, None);
+
+        assert!(music_hoard.new_artist(&artist_id).is_ok());
+
+        let mut expected: Option<Qobuz> = None;
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Adding incorect URL is an error.
+        assert!(music_hoard.add_qobuz_url(&artist_id, MUSICBRAINZ).is_err());
+        assert!(music_hoard.add_qobuz_url(&artist_id, MUSICBUTLER).is_err());
+        assert!(music_hoard.add_qobuz_url(&artist_id, BANDCAMP).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Adding URL to an artist not in the collection is an error.
+        assert!(music_hoard.add_qobuz_url(&artist_id_2, QOBUZ).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Adding URL to artist.
+        assert!(music_hoard.add_qobuz_url(&artist_id, QOBUZ).is_ok());
+        _ = expected.insert(Qobuz::new(QOBUZ).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Adding further URLs is an error.
+        assert!(music_hoard.add_qobuz_url(&artist_id, QOBUZ).is_err());
+        assert!(music_hoard.add_qobuz_url(&artist_id, QOBUZ_2).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Removing a URL from an artist not in the collection is an error.
+        assert!(music_hoard.remove_qobuz_url(&artist_id_2, QOBUZ).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Removing a URL is only okay if it matches the stored one.
+        assert!(music_hoard.remove_qobuz_url(&artist_id, QOBUZ_2).is_err());
+        assert!(music_hoard.remove_qobuz_url(&artist_id, QOBUZ).is_ok());
+        _ = expected.take();
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Removing a URl if one does not exist is an error.
+        assert!(music_hoard.remove_qobuz_url(&artist_id, QOBUZ).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Setting an incorrect URL is an error.
+        assert!(music_hoard.set_qobuz_url(&artist_id, MUSICBRAINZ).is_err());
+        assert!(music_hoard.set_qobuz_url(&artist_id, MUSICBUTLER).is_err());
+        assert!(music_hoard.set_qobuz_url(&artist_id, BANDCAMP).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Setting a URL on an artist not in the collection is an error.
+        assert!(music_hoard.set_qobuz_url(&artist_id_2, QOBUZ).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Setting a URL on an artist.
+        assert!(music_hoard.set_qobuz_url(&artist_id, QOBUZ).is_ok());
+        _ = expected.insert(Qobuz::new(QOBUZ).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        assert!(music_hoard.set_qobuz_url(&artist_id, QOBUZ).is_ok());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        assert!(music_hoard.set_qobuz_url(&artist_id, QOBUZ_2).is_ok());
+        _ = expected.insert(Qobuz::new(QOBUZ_2).unwrap());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Clearing URLs on an artist that does not exist is an error.
+        assert!(music_hoard.clear_qobuz_url(&artist_id_2).is_err());
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        // Clearing URLs.
+        assert!(music_hoard.clear_qobuz_url(&artist_id).is_ok());
+        _ = expected.take();
+        assert_eq!(music_hoard.collection[0].properties.qobuz, expected);
+
+        assert!(music_hoard.delete_artist(&artist_id).is_ok());
     }
 
     #[test]