Fixes the ReferenceValue type.

This type is a reference to another key at the root of the data.
Prior to this PR we were just storing the name and not the value that
the reference pointed to.

tests/test_client.py

@@ -68,6 +68,18 @@ DATA = {
         },
         'Unexpected': {'type': 'Unexpected'},
     },
+    'Course': {
+        "3": {
+          "_comment": "Normal",
+          "courseType": "Course",
+          "id": 3,
+          "name": "@WM_DRY27_COURSE_NORMAL_W",
+          "script": "",
+          "controlEnable": True,
+          "freshcareEnable": True,
+          "imgIndex": 61,
+        },
+    },
 }
 
 
@@ -101,7 +113,7 @@ class ModelInfoTest(unittest.TestCase):
 
     def test_value_reference(self):
         actual = self.model_info.value('Course')
-        expected = ReferenceValue('Course')
+        expected = ReferenceValue(DATA['Course'])
         self.assertEqual(expected, actual)
 
     def test_value_unsupported(self):

wideq/client.py

@@ -296,6 +296,8 @@ class DeviceInfo(object):
 BitValue = namedtuple('BitValue', ['options'])
 EnumValue = namedtuple('EnumValue', ['options'])
 RangeValue = namedtuple('RangeValue', ['min', 'max', 'step'])
+#: This is a value that is a reference to another key in the data that is at
+#: the same level as the `Value` key.
 ReferenceValue = namedtuple('ReferenceValue', ['reference'])
 
 
@@ -326,7 +328,8 @@ class ModelInfo(object):
             bit_values = {opt['startbit']: opt['value'] for opt in d['option']}
             return BitValue(bit_values)
         elif d['type'].lower() == 'reference':
-            return ReferenceValue(d['option'][0])
+            ref = d['option'][0]
+            return ReferenceValue(self.data[ref])
         else:
             raise ValueError("unsupported value type {}".format(d['type']))