app complete coverage

src/tui/app/machine/fetch_state.rs

@@ -19,12 +19,12 @@ use crate::tui::{
     },
 };
 
+pub type FetchReceiver = mpsc::Receiver<MbApiResult>;
 pub struct FetchState {
     fetch_rx: FetchReceiver,
     lookup_rx: Option<FetchReceiver>,
 }
 
-pub type FetchReceiver = mpsc::Receiver<MbApiResult>;
 impl FetchState {
     pub fn new(fetch_rx: FetchReceiver) -> Self {
         FetchState {
@@ -38,7 +38,7 @@ impl FetchState {
             let result = lookup_rx.try_recv();
             match result {
                 Ok(_) | Err(TryRecvError::Empty) => return result,
-                _ => {
+                Err(TryRecvError::Disconnected) => {
                     self.lookup_rx.take();
                 }
             }
@@ -214,12 +214,47 @@ mod tests {
             machine::tests::{inner, music_hoard},
             Delta, IApp, IAppAccess, IAppInteractBrowse, MatchStateInfo, MissOption, SearchOption,
         },
-        lib::interface::musicbrainz::{self, api::Match, daemon::MockIMbJobSender},
+        lib::interface::musicbrainz::{
+            self,
+            api::{Lookup, Match},
+            daemon::MockIMbJobSender,
+        },
         testmod::COLLECTION,
     };
 
     use super::*;
 
+    fn mbid() -> Mbid {
+        "00000000-0000-0000-0000-000000000000".try_into().unwrap()
+    }
+
+    #[test]
+    fn try_recv() {
+        let (fetch_tx, fetch_rx) = mpsc::channel();
+        let (lookup_tx, lookup_rx) = mpsc::channel();
+
+        let mut fetch = FetchState::new(fetch_rx);
+        fetch.lookup_rx.replace(lookup_rx);
+
+        let artist = COLLECTION[3].meta.clone();
+
+        let matches: Vec<Match<ArtistMeta>> = vec![];
+        let fetch_result = MatchStateInfo::artist_search(artist.clone(), matches);
+        fetch_tx.send(Ok(fetch_result.clone())).unwrap();
+
+        assert_eq!(fetch.try_recv(), Err(TryRecvError::Empty));
+
+        let lookup = Lookup::new(artist.clone());
+        let lookup_result = MatchStateInfo::artist_lookup(artist.clone(), lookup);
+        lookup_tx.send(Ok(lookup_result.clone())).unwrap();
+
+        assert_eq!(fetch.try_recv(), Ok(Ok(lookup_result)));
+
+        assert_eq!(fetch.try_recv(), Err(TryRecvError::Empty));
+        drop(lookup_tx);
+        assert_eq!(fetch.try_recv(), Ok(Ok(fetch_result)));
+    }
+
     #[test]
     fn fetch_no_artist() {
         let app = AppMachine::app_fetch_new(inner(music_hoard(vec![])));
@@ -265,6 +300,31 @@ mod tests {
         assert!(matches!(app, AppState::Match(_)));
     }
 
+    fn lookup_album_expectation(job_sender: &mut MockIMbJobSender, album: &AlbumMeta) {
+        let requests = VecDeque::from([MbParams::lookup_release_group(album.clone(), mbid())]);
+        job_sender
+            .expect_submit_foreground_job()
+            .with(predicate::always(), predicate::eq(requests))
+            .times(1)
+            .return_once(|_, _| Ok(()));
+    }
+
+    #[test]
+    fn lookup_album() {
+        let mut mb_job_sender = MockIMbJobSender::new();
+
+        let album = COLLECTION[1].albums[0].meta.clone();
+        lookup_album_expectation(&mut mb_job_sender, &album);
+
+        let music_hoard = music_hoard(COLLECTION.to_owned());
+        let inner = AppInner::new(music_hoard, mb_job_sender);
+
+        let (_fetch_tx, fetch_rx) = mpsc::channel();
+        let fetch = FetchState::new(fetch_rx);
+
+        AppMachine::app_lookup_album(inner, fetch, &album, mbid());
+    }
+
     fn search_artist_expectation(job_sender: &mut MockIMbJobSender, artist: &ArtistMeta) {
         let requests = VecDeque::from([MbParams::search_artist(artist.clone())]);
         job_sender
@@ -294,6 +354,31 @@ mod tests {
         assert!(matches!(app, AppState::Match(_)));
     }
 
+    fn lookup_artist_expectation(job_sender: &mut MockIMbJobSender, artist: &ArtistMeta) {
+        let requests = VecDeque::from([MbParams::lookup_artist(artist.clone(), mbid())]);
+        job_sender
+            .expect_submit_foreground_job()
+            .with(predicate::always(), predicate::eq(requests))
+            .times(1)
+            .return_once(|_, _| Ok(()));
+    }
+
+    #[test]
+    fn lookup_artist() {
+        let mut mb_job_sender = MockIMbJobSender::new();
+
+        let artist = COLLECTION[3].meta.clone();
+        lookup_artist_expectation(&mut mb_job_sender, &artist);
+
+        let music_hoard = music_hoard(COLLECTION.to_owned());
+        let inner = AppInner::new(music_hoard, mb_job_sender);
+
+        let (_fetch_tx, fetch_rx) = mpsc::channel();
+        let fetch = FetchState::new(fetch_rx);
+
+        AppMachine::app_lookup_artist(inner, fetch, &artist, mbid());
+    }
+
     #[test]
     fn fetch_artist_job_sender_err() {
         let mut mb_job_sender = MockIMbJobSender::new();
@@ -310,6 +395,26 @@ mod tests {
         assert!(matches!(app, AppState::Error(_)));
     }
 
+    #[test]
+    fn lookup_artist_job_sender_err() {
+        let mut mb_job_sender = MockIMbJobSender::new();
+
+        mb_job_sender
+            .expect_submit_foreground_job()
+            .return_once(|_, _| Err(DaemonError::JobChannelDisconnected));
+
+        let artist = COLLECTION[3].meta.clone();
+
+        let music_hoard = music_hoard(COLLECTION.to_owned());
+        let inner = AppInner::new(music_hoard, mb_job_sender);
+
+        let (_fetch_tx, fetch_rx) = mpsc::channel();
+        let fetch = FetchState::new(fetch_rx);
+
+        let app = AppMachine::app_lookup_artist(inner, fetch, &artist, mbid());
+        assert!(matches!(app, AppState::Error(_)));
+    }
+
     #[test]
     fn recv_ok_fetch_ok() {
         let (tx, rx) = mpsc::channel::<MbApiResult>();

src/tui/app/machine/input.rs

@@ -64,20 +64,12 @@ impl IAppInput for AppInputMode {
 #[cfg(test)]
 mod tests {
     use crate::tui::app::{
-        machine::tests::{mb_job_sender, music_hoard_init},
+        machine::tests::{input_event, mb_job_sender, music_hoard_init},
         IApp,
     };
 
     use super::*;
 
-    fn input_event(c: char) -> InputEvent {
-        crossterm::event::KeyEvent::new(
-            crossterm::event::KeyCode::Char(c),
-            crossterm::event::KeyModifiers::empty(),
-        )
-        .into()
-    }
-
     #[test]
     fn handle_input() {
         let mut app = App::new(music_hoard_init(vec![]), mb_job_sender());

src/tui/app/machine/match_state.rs

@@ -218,8 +218,9 @@ impl IAppInteractMatch for AppMachine<MatchState> {
 
 #[cfg(test)]
 mod tests {
-    use std::sync::mpsc;
+    use std::{collections::VecDeque, sync::mpsc};
 
+    use mockall::predicate;
     use musichoard::collection::{
         album::{AlbumDate, AlbumId, AlbumMeta, AlbumPrimaryType, AlbumSecondaryType},
         artist::{ArtistId, ArtistMeta},
@@ -227,10 +228,13 @@ mod tests {
 
     use crate::tui::{
         app::{
-            machine::tests::{inner, music_hoard},
+            machine::tests::{inner, inner_with_mb, input_event, music_hoard},
             IApp, IAppAccess, IAppInput,
         },
-        lib::interface::musicbrainz::api::Match,
+        lib::interface::musicbrainz::{
+            api::{Lookup, Match},
+            daemon::{MbParams, MockIMbJobSender},
+        },
     };
 
     use super::*;
@@ -245,6 +249,15 @@ mod tests {
         }
     }
 
+    impl<T> Lookup<T> {
+        pub fn new(item: T) -> Self {
+            Lookup {
+                item,
+                disambiguation: None,
+            }
+        }
+    }
+
     fn artist_match() -> MatchStateInfo {
         let artist = ArtistMeta::new(ArtistId::new("Artist"));
 
@@ -259,6 +272,12 @@ mod tests {
         MatchStateInfo::artist_search(artist, list)
     }
 
+    fn artist_lookup() -> MatchStateInfo {
+        let artist = ArtistMeta::new(ArtistId::new("Artist"));
+        let lookup = Lookup::new(artist.clone());
+        MatchStateInfo::artist_lookup(artist, lookup)
+    }
+
     fn album_match() -> MatchStateInfo {
         let album = AlbumMeta::new(
             AlbumId::new("Album"),
@@ -279,6 +298,17 @@ mod tests {
         MatchStateInfo::album_search(album, list)
     }
 
+    fn album_lookup() -> MatchStateInfo {
+        let album = AlbumMeta::new(
+            AlbumId::new("Album"),
+            AlbumDate::new(Some(1990), Some(5), None),
+            Some(AlbumPrimaryType::Album),
+            vec![AlbumSecondaryType::Live, AlbumSecondaryType::Compilation],
+        );
+        let lookup = Lookup::new(album.clone());
+        MatchStateInfo::album_lookup(album, lookup)
+    }
+
     fn fetch_state() -> FetchState {
         let (_, rx) = mpsc::channel();
         FetchState::new(rx)
@@ -329,7 +359,7 @@ mod tests {
         assert_eq!(public_matches.state, &widget_state);
     }
 
-    fn match_state_flow(mut matches_info: MatchStateInfo) {
+    fn match_state_flow(mut matches_info: MatchStateInfo, len: usize) {
         // tx must exist for rx to return Empty rather than Disconnected.
         #[allow(unused_variables)]
         let (tx, rx) = mpsc::channel();
@@ -350,27 +380,30 @@ mod tests {
         assert_eq!(matches.state.current.as_ref(), Some(&matches_info));
         assert_eq!(matches.state.state.list.selected(), Some(0));
 
-        let matches = matches.next_match().unwrap_match();
+        let mut matches = matches;
+        for ii in 1..len {
+            matches = matches.next_match().unwrap_match();
 
-        assert_eq!(matches.state.current.as_ref(), Some(&matches_info));
+            assert_eq!(matches.state.current.as_ref(), Some(&matches_info));
-        assert_eq!(matches.state.state.list.selected(), Some(1));
+            assert_eq!(matches.state.state.list.selected(), Some(ii));
+        }
 
         // Next is CannotHaveMBID
         let matches = matches.next_match().unwrap_match();
 
         assert_eq!(matches.state.current.as_ref(), Some(&matches_info));
-        assert_eq!(matches.state.state.list.selected(), Some(2));
+        assert_eq!(matches.state.state.list.selected(), Some(len));
 
         // Next is ManualInputMbid
         let matches = matches.next_match().unwrap_match();
 
         assert_eq!(matches.state.current.as_ref(), Some(&matches_info));
-        assert_eq!(matches.state.state.list.selected(), Some(3));
+        assert_eq!(matches.state.state.list.selected(), Some(len + 1));
 
         let matches = matches.next_match().unwrap_match();
 
         assert_eq!(matches.state.current.as_ref(), Some(&matches_info));
-        assert_eq!(matches.state.state.list.selected(), Some(3));
+        assert_eq!(matches.state.state.list.selected(), Some(len + 1));
 
         // Go prev_match first as selecting on manual input does not go back to fetch.
         let matches = matches.prev_match().unwrap_match();
@@ -379,12 +412,22 @@ mod tests {
 
     #[test]
     fn artist_matches_flow() {
-        match_state_flow(artist_match());
+        match_state_flow(artist_match(), 2);
+    }
+
+    #[test]
+    fn artist_lookup_flow() {
+        match_state_flow(artist_lookup(), 1);
     }
 
     #[test]
     fn album_matches_flow() {
-        match_state_flow(album_match());
+        match_state_flow(album_match(), 2);
+    }
+
+    #[test]
+    fn album_lookup_flow() {
+        match_state_flow(album_lookup(), 1);
     }
 
     #[test]
@@ -430,4 +473,73 @@ mod tests {
         let input = app.mode().unwrap_input();
         input.confirm().unwrap_error();
     }
+
+    fn mbid() -> Mbid {
+        "00000000-0000-0000-0000-000000000000".try_into().unwrap()
+    }
+
+    fn input_mbid(mut app: App) -> App {
+        let mbid = mbid().uuid().to_string();
+        for c in mbid.chars() {
+            let input = app.mode().unwrap_input();
+            app = input.input(input_event(c));
+        }
+        app
+    }
+
+    #[test]
+    fn select_manual_input_artist() {
+        let mut mb_job_sender = MockIMbJobSender::new();
+        let artist = ArtistMeta::new(ArtistId::new("Artist"));
+        let requests = VecDeque::from([MbParams::lookup_artist(artist.clone(), mbid())]);
+        mb_job_sender
+            .expect_submit_foreground_job()
+            .with(predicate::always(), predicate::eq(requests))
+            .return_once(|_, _| Ok(()));
+
+        let matches_vec: Vec<Match<ArtistMeta>> = vec![];
+        let artist_match = MatchStateInfo::artist_search(artist.clone(), matches_vec);
+        let matches = AppMachine::match_state(
+            inner_with_mb(music_hoard(vec![]), mb_job_sender),
+            match_state(Some(artist_match)),
+        );
+
+        // There are no matches which means that the second option should be manual input.
+        let matches = matches.next_match().unwrap_match();
+        let matches = matches.next_match().unwrap_match();
+
+        let mut app = matches.select();
+        app = input_mbid(app);
+
+        let input = app.mode().unwrap_input();
+        input.confirm();
+    }
+
+    #[test]
+    fn select_manual_input_album() {
+        let mut mb_job_sender = MockIMbJobSender::new();
+        let album = AlbumMeta::new::<_, u32>("Album", 1990u32.into(), None, vec![]);
+        let requests = VecDeque::from([MbParams::lookup_release_group(album.clone(), mbid())]);
+        mb_job_sender
+            .expect_submit_foreground_job()
+            .with(predicate::always(), predicate::eq(requests))
+            .return_once(|_, _| Ok(()));
+
+        let matches_vec: Vec<Match<AlbumMeta>> = vec![];
+        let album_match = MatchStateInfo::album_search(album.clone(), matches_vec);
+        let matches = AppMachine::match_state(
+            inner_with_mb(music_hoard(vec![]), mb_job_sender),
+            match_state(Some(album_match)),
+        );
+
+        // There are no matches which means that the second option should be manual input.
+        let matches = matches.next_match().unwrap_match();
+        let matches = matches.next_match().unwrap_match();
+
+        let mut app = matches.select();
+        app = input_mbid(app);
+
+        let input = app.mode().unwrap_input();
+        input.confirm();
+    }
 }

src/tui/app/machine/mod.rs

@@ -222,7 +222,7 @@ mod tests {
     use musichoard::collection::Collection;
 
     use crate::tui::{
-        app::{AppState, IApp, IAppInput, IAppInteractBrowse},
+        app::{AppState, IApp, IAppInput, IAppInteractBrowse, InputEvent},
         lib::{interface::musicbrainz::daemon::MockIMbJobSender, MockIMusicHoard},
     };
 
@@ -355,6 +355,14 @@ mod tests {
         AppInner::new(music_hoard, mb_job_sender)
     }
 
+    pub fn input_event(c: char) -> InputEvent {
+        crossterm::event::KeyEvent::new(
+            crossterm::event::KeyCode::Char(c),
+            crossterm::event::KeyModifiers::empty(),
+        )
+        .into()
+    }
+
     #[test]
     fn input_mode() {
         let app = App::new(music_hoard_init(vec![]), mb_job_sender());

src/tui/lib/external/musicbrainz/daemon/mod.rs

@@ -110,7 +110,7 @@ impl IMbJobSender for JobSender {
         result_sender: ResultSender,
         requests: VecDeque<MbParams>,
     ) -> Result<(), Error> {
-        self.send_foreground_job(result_sender, requests)
+        self.send_job(JobPriority::Foreground, result_sender, requests)
     }
 
     fn submit_background_job(
@@ -118,27 +118,11 @@ impl IMbJobSender for JobSender {
         result_sender: ResultSender,
         requests: VecDeque<MbParams>,
     ) -> Result<(), Error> {
-        self.send_background_job(result_sender, requests)
+        self.send_job(JobPriority::Background, result_sender, requests)
     }
 }
 
 impl JobSender {
-    fn send_foreground_job(
-        &self,
-        result_sender: ResultSender,
-        requests: VecDeque<MbParams>,
-    ) -> Result<(), Error> {
-        self.send_job(JobPriority::Foreground, result_sender, requests)
-    }
-
-    fn send_background_job(
-        &self,
-        result_sender: ResultSender,
-        requests: VecDeque<MbParams>,
-    ) -> Result<(), Error> {
-        self.send_job(JobPriority::Background, result_sender, requests)
-    }
-
     fn send_job(
         &self,
         priority: JobPriority,
@@ -337,7 +321,7 @@ mod tests {
 
     use crate::tui::{
         event::{Event, EventError, MockIFetchCompleteEventSender},
-        lib::interface::musicbrainz::api::{Match, MockIMusicBrainz},
+        lib::interface::musicbrainz::api::{Lookup, Match, MockIMusicBrainz},
         testmod::COLLECTION,
     };
 
@@ -387,12 +371,28 @@ mod tests {
         }
     }
 
+    fn mbid() -> Mbid {
+        "00000000-0000-0000-0000-000000000000".try_into().unwrap()
+    }
+
+    fn lookup_artist_requests() -> VecDeque<MbParams> {
+        let artist = COLLECTION[3].meta.clone();
+        let mbid = mbid();
+        VecDeque::from([MbParams::lookup_artist(artist, mbid)])
+    }
+
+    fn lookup_release_group_requests() -> VecDeque<MbParams> {
+        let album = COLLECTION[1].albums[0].meta.clone();
+        let mbid = mbid();
+        VecDeque::from([MbParams::lookup_release_group(album, mbid)])
+    }
+
     fn search_artist_requests() -> VecDeque<MbParams> {
         let artist = COLLECTION[3].meta.clone();
         VecDeque::from([MbParams::search_artist(artist)])
     }
 
-    fn artist_expectations() -> (ArtistMeta, Vec<Match<ArtistMeta>>) {
+    fn search_artist_expectations() -> (ArtistMeta, Vec<Match<ArtistMeta>>) {
         let artist = COLLECTION[3].meta.clone();
 
         let artist_match_1 = Match::new(100, artist.clone());
@@ -420,7 +420,7 @@ mod tests {
         mbref.unwrap().mbid().clone()
     }
 
-    fn album_expectations_1() -> (AlbumMeta, Vec<Match<AlbumMeta>>) {
+    fn search_album_expectations_1() -> (AlbumMeta, Vec<Match<AlbumMeta>>) {
         let album_1 = COLLECTION[1].albums[0].meta.clone();
         let album_4 = COLLECTION[1].albums[3].meta.clone();
 
@@ -431,7 +431,7 @@ mod tests {
         (album_1, matches_1)
     }
 
-    fn album_expectations_4() -> (AlbumMeta, Vec<Match<AlbumMeta>>) {
+    fn search_album_expectations_4() -> (AlbumMeta, Vec<Match<AlbumMeta>>) {
         let album_1 = COLLECTION[1].albums[0].meta.clone();
         let album_4 = COLLECTION[1].albums[3].meta.clone();
 
@@ -515,6 +515,90 @@ mod tests {
         assert_eq!(result, Err(JobError::JobQueueEmpty));
     }
 
+    fn lookup_artist_expectation(
+        musicbrainz: &mut MockIMusicBrainz,
+        mbid: &Mbid,
+        lookup: &Lookup<ArtistMeta>,
+    ) {
+        let result = Ok(lookup.clone());
+        musicbrainz
+            .expect_lookup_artist()
+            .with(predicate::eq(mbid.clone()))
+            .times(1)
+            .return_once(|_| result);
+    }
+
+    #[test]
+    fn execute_lookup_artist() {
+        let mut musicbrainz = musicbrainz();
+        let mbid = mbid();
+        let artist = COLLECTION[3].meta.clone();
+        let lookup = Lookup::new(artist.clone());
+        lookup_artist_expectation(&mut musicbrainz, &mbid, &lookup);
+
+        let mut event_sender = event_sender();
+        fetch_complete_expectation(&mut event_sender, 1);
+
+        let (job_sender, job_receiver) = job_channel();
+        let mut daemon = daemon_with(musicbrainz, job_receiver, event_sender);
+
+        let requests = lookup_artist_requests();
+        let (result_sender, result_receiver) = mpsc::channel();
+        let result = job_sender.submit_foreground_job(result_sender, requests);
+        assert_eq!(result, Ok(()));
+
+        let result = daemon.enqueue_all_pending_jobs();
+        assert_eq!(result, Ok(()));
+
+        let result = daemon.execute_next_job();
+        assert_eq!(result, Ok(()));
+
+        let result = result_receiver.try_recv().unwrap();
+        assert_eq!(result, Ok(MatchStateInfo::artist_lookup(artist, lookup)));
+    }
+
+    fn lookup_release_group_expectation(
+        musicbrainz: &mut MockIMusicBrainz,
+        mbid: &Mbid,
+        lookup: &Lookup<AlbumMeta>,
+    ) {
+        let result = Ok(lookup.clone());
+        musicbrainz
+            .expect_lookup_release_group()
+            .with(predicate::eq(mbid.clone()))
+            .times(1)
+            .return_once(|_| result);
+    }
+
+    #[test]
+    fn execute_lookup_release_group() {
+        let mut musicbrainz = musicbrainz();
+        let mbid = mbid();
+        let album = COLLECTION[1].albums[0].meta.clone();
+        let lookup = Lookup::new(album.clone());
+        lookup_release_group_expectation(&mut musicbrainz, &mbid, &lookup);
+
+        let mut event_sender = event_sender();
+        fetch_complete_expectation(&mut event_sender, 1);
+
+        let (job_sender, job_receiver) = job_channel();
+        let mut daemon = daemon_with(musicbrainz, job_receiver, event_sender);
+
+        let requests = lookup_release_group_requests();
+        let (result_sender, result_receiver) = mpsc::channel();
+        let result = job_sender.submit_foreground_job(result_sender, requests);
+        assert_eq!(result, Ok(()));
+
+        let result = daemon.enqueue_all_pending_jobs();
+        assert_eq!(result, Ok(()));
+
+        let result = daemon.execute_next_job();
+        assert_eq!(result, Ok(()));
+
+        let result = result_receiver.try_recv().unwrap();
+        assert_eq!(result, Ok(MatchStateInfo::album_lookup(album, lookup)));
+    }
+
     fn search_artist_expectation(
         musicbrainz: &mut MockIMusicBrainz,
         artist: &ArtistMeta,
@@ -531,7 +615,7 @@ mod tests {
     #[test]
     fn execute_search_artist() {
         let mut musicbrainz = musicbrainz();
-        let (artist, matches) = artist_expectations();
+        let (artist, matches) = search_artist_expectations();
         search_artist_expectation(&mut musicbrainz, &artist, &matches);
 
         let mut event_sender = event_sender();
@@ -575,8 +659,8 @@ mod tests {
     fn execute_search_release_groups() {
         let mut musicbrainz = musicbrainz();
         let arid = album_arid_expectation();
-        let (album_1, matches_1) = album_expectations_1();
+        let (album_1, matches_1) = search_album_expectations_1();
-        let (album_4, matches_4) = album_expectations_4();
+        let (album_4, matches_4) = search_album_expectations_4();
 
         let mut seq = Sequence::new();
         search_release_group_expectation(&mut musicbrainz, &mut seq, &arid, &album_1, &matches_1);
@@ -613,7 +697,7 @@ mod tests {
     fn execute_search_release_groups_result_disconnect() {
         let mut musicbrainz = musicbrainz();
         let arid = album_arid_expectation();
-        let (album_1, matches_1) = album_expectations_1();
+        let (album_1, matches_1) = search_album_expectations_1();
 
         let mut seq = Sequence::new();
         search_release_group_expectation(&mut musicbrainz, &mut seq, &arid, &album_1, &matches_1);
@@ -643,7 +727,7 @@ mod tests {
     #[test]
     fn execute_search_artist_event_disconnect() {
         let mut musicbrainz = musicbrainz();
-        let (artist, matches) = artist_expectations();
+        let (artist, matches) = search_artist_expectations();
         search_artist_expectation(&mut musicbrainz, &artist, &matches);
 
         let mut event_sender = event_sender();