Merge "Add dict as basic type"

valence/common/types.py

@@ -125,3 +125,17 @@ class List(object):
             return [self.type.validate(v) for v in value]
         except Exception:
             raise ValueError("Failed to validate received value")
+
+
+class Dict(object):
+    type_name = 'Dict'
+
+    @classmethod
+    def validate(cls, value, default={}):
+        if value is None:
+            value = default
+
+        if not isinstance(value, dict):
+            raise ValueError("Failed to validate received value")
+
+        return value

valence/tests/unit/common/test_types.py

@@ -145,3 +145,20 @@ class TestTypes(TestCase):
         self.assertIsInstance(value, list)
         self.assertIsInstance(value[0], TestAPI)
         self.assertEqual({'test': 'test_value'}, value[0].as_dict())
+
+    def test_dict_type(self):
+        # Test default value
+        self.assertEqual({}, types.Dict.validate(None))
+        self.assertEqual({}, types.Dict.validate(None, default={}))
+
+        # Test validate successfully
+        self.assertEqual({"abc": "xyz"}, types.Dict.validate({"abc": "xyz"}))
+        self.assertEqual({}, types.Dict.validate({}))
+
+        # Test validate failed
+        self.assertRaises(ValueError,
+                          types.Dict.validate, "test")
+        self.assertRaises(ValueError,
+                          types.Dict.validate, 123)
+        self.assertRaises(ValueError,
+                          types.Dict.validate, [])