Add more unit tests, fix a few small bugs

gpiozero/boards.py

@@ -18,6 +18,7 @@ from .exc import (
     GPIOPinMissing,
     EnergenieSocketMissing,
     EnergenieBadSocket,
+    OutputDeviceBadValue,
     )
 from .input_devices import Button
 from .output_devices import OutputDevice, LED, PWMLED, Buzzer, Motor
@@ -402,6 +403,8 @@ class LEDBarGraph(LEDCollection):
 
     @value.setter
     def value(self, value):
+        if not -1 <= value <= 1:
+            raise OutputDeviceBadValue('LEDBarGraph value must be between -1 and 1')
         count = len(self)
         leds = self
         if value < 0:

gpiozero/input_devices.py

@@ -165,7 +165,7 @@ class SmoothedInputDevice(EventsMixin, InputDevice):
             if self.partial or self._queue.full.wait(0):
                 return super(SmoothedInputDevice, self).__repr__()
             else:
-                return "<gpiozero.%s object on pin=%d, pull_up=%s>" % (
+                return "<gpiozero.%s object on pin=%r, pull_up=%s>" % (
                     self.__class__.__name__, self.pin, self.pull_up)
 
     @property

gpiozero/output_devices.py

@@ -581,7 +581,7 @@ class RGBLED(SourceMixin, Device):
 
     @property
     def closed(self):
-        return bool(self._leds)
+        return len(self._leds) == 0
 
     @property
     def value(self):