Rflink: added support for lights with toggle type (#6521)

* added support for lights with toggle type

* fixed style errors

* introduced tests for the toggle type

it's not passing yet because of an assertionerror at line 407

* updated to reflect tristate of "state"

* Format code according to pep8

Added line break for import that was too long.

* fixed lint, replaced if statement with 'var = bool(test)'

* changed implementation of state check according to bug on 6bceb04ca1 (r106758784)

homeassistant/components/rflink.py

@@ -316,6 +316,12 @@ class RflinkCommand(RflinkDevice):
             cmd = str(int(args[0] / 17))
             self._state = True
 
+        elif command == 'toggle':
+            cmd = 'on'
+            # if the state is unknown or false, it gets set as true
+            # if the state is true, it gets set as false
+            self._state = self._state in [STATE_UNKNOWN, False]
+
         # Send initial command and queue repetitions.
         # This allows the entity state to be updated quickly and not having to
         # wait for all repetitions to be sent