Add spotify queue

tests/fake_spotify.py

@@ -1,5 +1,5 @@
 """Stand-in Spotify Web API: just enough of /api/token, .../player/devices,
-.../player, .../player/pause and .../player/seek to test spotify.py against, the same way
+.../player, .../player/queue, .../player/pause and .../player/seek to test spotify.py against, the same way
 fakes.py stands in for real HEOS hardware."""
 
 import json
@@ -27,6 +27,7 @@ class FakeSpotify(threading.Thread):
         self.reject_refresh = False    # simulate a revoked refresh token
         self.scope = "user-read-playback-state user-modify-playback-state"
         self.player = None             # GET /v1/me/player's body; None is no session (204)
+        self.queue = []                # GET /v1/me/player/queue's "queue"
         self.forbid = None             # a plain-text 403 body every API call answers with
 
         fake = self
@@ -130,6 +131,12 @@ class FakeSpotify(threading.Thread):
                     else:
                         self._send(200, fake.player)
                     return
+                if self.path == "/v1/me/player/queue":
+                    if not self._authorized():
+                        self._send(401, {"error": {"message": "The access token expired"}})
+                        return
+                    self._send(200, {"currently_playing": None, "queue": fake.queue})
+                    return
                 self._send(404, {"error": {"message": "not found"}})
 
         self.server = HTTPServer(("127.0.0.1", 0), Handler)