Remove group management

tests/fakes.py

@@ -1,8 +1,9 @@
 """Stand-in HEOS hardware: just enough of the CLI protocol to test against.
 
 The grouping rules are the part worth pinning down -- what a set_group
-call does to a stereo pair is the kind of thing you do not want to find
-out by experimenting on the speakers at eleven at night.
+call actually does to players already in a group is the kind of thing
+you do not want to find out by experimenting on the speakers at eleven
+at night.
 """
 
 import json
@@ -11,9 +12,14 @@ import threading
 
 
 class FakeHeos(threading.Thread):
-    """A HEOS CLI server on localhost, with four players and a pair."""
+    """A HEOS CLI server on localhost, with three players.
 
-    NAMES = {1: "Home Cinema", 2: "Lego Room", 3: "Denon Home 200 L", 4: "Denon Home 200 R"}
+    "Denon Home 200 L" stands in for the living room's stereo pair --
+    HEOS pairs that kind of In-Room Group at the hardware level, so it
+    is one player, one pid, exactly like any other room.
+    """
+
+    NAMES = {1: "Home Cinema", 2: "Lego Room", 3: "Denon Home 200 L"}
 
     # What browse/browse?sid=<AVR pid> reports: HEOS's own list of the
     # AVR's local inputs, already under whatever names you gave them in
@@ -26,10 +32,10 @@ class FakeHeos(threading.Thread):
 
     def __init__(self):
         super().__init__(daemon=True)
-        self.groups = {3: [3, 4]}                     # gid -> pids, leader first
+        self.groups = {}                               # gid -> pids, leader first
         self.volumes = {pid: 20 for pid in self.NAMES}
         self.play_states = {pid: "play" for pid in self.NAMES}
-        self.group_volumes = {3: 25}
+        self.group_volumes = {}
         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