fix music navs

tests/fakes.py

@@ -32,6 +32,7 @@ class FakeHeos(threading.Thread):
         self.group_volumes = {3: 25}
         self.now_playing_mid = {1: "inputs/mediaplayer"}  # pid -> what get_now_playing_media reports
         self.now_playing_sid = {}                     # pid -> its source id; 4 is Spotify
+        self.now_playing_track = {}                   # pid -> song/artist/image_url fields
         self.commands = []                            # everything we were asked to do
         self.server = socket.socket()
         self.server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
@@ -124,6 +125,7 @@ class FakeHeos(threading.Thread):
             payload = {"mid": mid, "station": name} if mid else {}
             if pid in self.now_playing_sid:
                 payload["sid"] = self.now_playing_sid[pid]
+            payload.update(self.now_playing_track.get(pid, {}))
             return self._ok(path, payload=payload)
 
         if path == "browse/browse":