Restart transport if stopped

Sometimes this happens now with caching.

squeezealexa/squeezebox/server.py

@@ -170,9 +170,13 @@ def _request(self, lines, raw=False, wait=True) -> List[str]:
         first_word = (match.group(2) if match
                       else ' '.join(lines[0].split()[:2]))
         if not (self.transport.is_connected or first_word == 'login'):
-            raise SqueezeboxException(
-                "Can't do '{cmd}', {transport} is not connected".format(
-                    cmd=first_word, transport=self.transport))
+            try:
+                print_w("Transport wasn't connected - trying to restart")
+                self.transport.start()
+            except Exception:
+                raise SqueezeboxException(
+                    "Can't do '{cmd}', {transport} is not connected".format(
+                        cmd=first_word, transport=self.transport))
 
         if self._debug:
             print_d("<<<< " + "\n..<< ".join(lines))

tests/squeezebox/test_server.py

@@ -209,17 +209,15 @@ def test_track_details(self):
         details = self.server.get_track_details()
         assert ["Jamie Cullum"] == details['artist']
 
-    def test_disconnected_transport(self):
+    def test_disconnected_transport_reconnects(self):
         self.transport.is_connected = False
-        with raises(SqueezeboxException) as e:
-            self.server._request(["foo"])
-        assert "Can't do 'foo'" in str(e)
+        self.server._request(["foo"])
+        assert self.transport.is_connected
 
-    def test_disconnected_transport_player_request(self):
+    def test_disconnected_transport_player_request_reconnects(self):
         self.transport.is_connected = False
-        with raises(SqueezeboxException) as e:
-            self.server.player_request("foo", player_id=A_PLAYER_ID)
-        assert "Can't do 'foo'" in str(e)
+        self.server.player_request("foo", player_id=A_PLAYER_ID)
+        assert self.transport.is_connected
 
 
 class TestServerWithStubbedTransport: