explicit info in GUI for playlist

internal/playback/playlist_failure_test.go

@@ -2,6 +2,7 @@ package playback
 
 import (
 	"context"
+	"errors"
 	"testing"
 	"time"
 )
@@ -152,7 +153,15 @@ func TestPlaylistControllerFailurePolicy(t *testing.T) {
 
 			commands <- PlaylistCommand{Kind: PlaylistSelect, Index: 0}
 			<-sessions
-			events <- PlaylistEvent{Revision: 1, Kind: PlaylistEventFailed}
+			failureErr := errors.New("flow unavailable")
+			events <- PlaylistEvent{
+				Revision: 1,
+				Kind:     PlaylistEventFailed,
+				Failure: Status{
+					Unit: UnitVideo, State: StateFailed,
+					Attempt: 2, FailedAttempts: 2, Err: failureErr,
+				},
+			}
 
 			if test.wantAdvance {
 				select {
@@ -160,16 +169,23 @@ func TestPlaylistControllerFailurePolicy(t *testing.T) {
 				case <-time.After(time.Second):
 					t.Fatal("failure did not advance playlist")
 				}
-				snapshot, _ := controller.Snapshot()
+				snapshot := waitForPlaylistSnapshot(t, controller, func(snapshot PlaylistSnapshot) bool {
+					return snapshot.State.CurrentIndex == 1 && snapshot.Revision == 2
+				})
 				if snapshot.State.CurrentIndex != 1 || snapshot.Revision != 2 {
 					t.Fatalf("snapshot = %#v, want index 1 revision 2", snapshot)
 				}
+				assertPlaylistFailure(t, snapshot, failureErr)
 			} else {
 				select {
 				case command := <-sessions:
 					t.Fatalf("unexpected session command: %#v", command)
 				case <-time.After(20 * time.Millisecond):
 				}
+				snapshot := waitForPlaylistSnapshot(t, controller, func(snapshot PlaylistSnapshot) bool {
+					return snapshot.HasFailure
+				})
+				assertPlaylistFailure(t, snapshot, failureErr)
 			}
 
 			cancel()
@@ -179,3 +195,16 @@ func TestPlaylistControllerFailurePolicy(t *testing.T) {
 		})
 	}
 }
+
+func assertPlaylistFailure(t *testing.T, snapshot PlaylistSnapshot, wantErr error) {
+	t.Helper()
+	if !snapshot.HasFailure {
+		t.Fatal("snapshot has no playlist failure")
+	}
+	failure := snapshot.Failure
+	if failure.EntryIndex != 0 || failure.EntryName != "first" ||
+		failure.Status.Unit != UnitVideo || failure.Status.Attempt != 2 ||
+		failure.Status.FailedAttempts != 2 || !errors.Is(failure.Status.Err, wantErr) {
+		t.Fatalf("failure = %#v", failure)
+	}
+}