Add unit test

src/tui/app/machine/match_state.rs

@@ -682,15 +682,13 @@ mod tests {
         reduced[0].albums.retain(|a| a.meta.id.mb_ref != mb_ref);
 
         // We need a custom music_hoard to override the get_filtered expectations.
-        let mut music_hoard = MockIMusicHoard::new();
+        let mut mh = MockIMusicHoard::new();
         let mut seq = Sequence::new();
-        music_hoard
-            .expect_get_filtered()
+        mh.expect_get_filtered()
             .times(2)
             .in_sequence(&mut seq)
             .return_const(collection.clone());
-        music_hoard
-            .expect_get_filtered()
+        mh.expect_get_filtered()
             .times(1)
             .in_sequence(&mut seq)
             .return_const(reduced.clone());
@@ -701,31 +699,27 @@ mod tests {
                 let artist = matches.artist.clone();
 
                 let mut seq = Sequence::new();
-                music_hoard
-                    .expect_get_collection()
+                mh.expect_get_collection()
                     .times(1)
                     .in_sequence(&mut seq)
                     .return_const(collection.clone());
-                music_hoard
-                    .expect_remove_album()
+                mh.expect_remove_album()
                     .times(1)
                     .with(eq(artist), eq(removed.meta.id.clone()))
                     .in_sequence(&mut seq)
                     .return_once(|_, _| Ok(()));
-                music_hoard
-                    .expect_merge_album_info()
+                mh.expect_merge_album_info()
                     .times(1)
                     .in_sequence(&mut seq)
                     .return_once(|_, _, _| Ok(()));
-                music_hoard
-                    .expect_set_album_mb_ref()
+                mh.expect_set_album_mb_ref()
                     .times(1)
                     .in_sequence(&mut seq)
                     .return_once(|_, _, _| Ok(()));
             }
         }
 
-        let mut matches = AppMachine::match_state(inner(music_hoard), app_matches);
+        let mut matches = AppMachine::match_state(inner(mh), app_matches);
 
         // Make sure the last album is selected.
         let selection = &mut matches.inner.selection;
@@ -747,6 +741,58 @@ mod tests {
         assert_eq!(album.meta, selected.meta);
     }
 
+    #[test]
+    fn set_album_info_with_clashing_cannot_have_mbid() {
+        let matches_info = album_match();
+
+        // The collection below should trigger MH to remove the album with the same MBID but not
+        // matching album_id.
+
+        // (1) Same artist as matches_info.
+        let mut artist = Artist::new(ArtistId::new("Artist"));
+
+        // (2) An album with the same album_id as the selected one.
+        artist.albums.push(Album::new(AlbumId::new("Album")));
+
+        // (3) An album with a different album_id than the selected one.
+        // (4) This album has an MBID that is identical to that of the selected match.
+        let removed =
+            Album::new(AlbumId::new("Album: Not the Same").with_mb_ref(AlbumMbRef::CannotHaveMbid));
+        artist.albums.push(removed.clone());
+
+        // (5) An album after the one that will be removed. Selection must remain on it.
+        let selected = Album::new(AlbumId::new("Album: Z"));
+        artist.albums.push(selected.clone());
+
+        let (_tx, rx) = mpsc::channel();
+        let app_matches = MatchState::new(matches_info.clone(), FetchState::search(rx));
+
+        let collection = vec![artist];
+        let mut mh = music_hoard(collection.clone());
+
+        match matches_info {
+            EntityMatches::Artist(_) => panic!(),
+            EntityMatches::Album(_) => {
+                let mut seq = Sequence::new();
+                mh.expect_get_collection()
+                    .times(1)
+                    .in_sequence(&mut seq)
+                    .return_const(collection.clone());
+                mh.expect_merge_album_info()
+                    .times(1)
+                    .in_sequence(&mut seq)
+                    .return_once(|_, _, _| Ok(()));
+                mh.expect_set_album_mb_ref()
+                    .times(1)
+                    .in_sequence(&mut seq)
+                    .return_once(|_, _, _| Ok(()));
+            }
+        }
+
+        let matches = AppMachine::match_state(inner(mh), app_matches);
+        matches.select().unwrap_fetch();
+    }
+
     #[test]
     fn set_info_error() {
         let matches_info = artist_match();