test config with Optional of dict

data/config/openwb_local.conf

@@ -1,9 +1,9 @@
-# openwb-version:3
-listener 1886 localhost
+# openwb-version:4
+listener 1886 127.0.0.1
 allow_anonymous true
 
 connection bridge-01
-address localhost:1883
+address 127.0.0.1:1883
 topic openWB/set/# both 2
 
 topic openWB/vehicle/+/name out 2

packages/RPi/GPIO.py

@@ -0,0 +1,19 @@
+BOARD = 1
+OUT = 1
+IN = 1
+
+
+def setmode(a):
+    pass
+
+
+def setup(a, b, c):
+    pass
+
+
+def input(a):
+    pass
+
+
+def cleanup():
+    pass

packages/dataclass_utils/_dataclass_from_dict_test.py

@@ -1,4 +1,4 @@
-from typing import Type, TypeVar, Generic
+from typing import Generic, Optional, Type, TypeVar
 
 import pytest
 
@@ -29,6 +29,12 @@ def __init__(self, a: str):
         super().__init__(a)
 
 
+class Optionals:
+    def __init__(self, a: str, o: Optional[dict] = None):
+        self.a = a
+        self.o = o
+
+
 def test_from_dict_simple():
     # execution
     actual = dataclass_from_dict(SimpleSample, {"b": "bValue", "a": "aValue"})
@@ -86,3 +92,21 @@ def test_from_dict_fails_on_invalid_properties(type: Type[T], invalid_parameter:
         dataclass_from_dict(type, {"invalid": "dict"})
     assert str(e.value) == "Cannot determine value for parameter " + invalid_parameter + \
            ": not given in {'invalid': 'dict'} and no default value specified"
+
+
+def test_from_dict_wit_optional():
+    # execution
+    actual = dataclass_from_dict(Optionals, {"a": "aValue", "o": {"b": "bValue"}})
+
+    # evaluation
+    assert actual.a == "aValue"
+    assert actual.o == {"b": "bValue"}
+
+
+def test_from_dict_without_optional():
+    # execution
+    actual = dataclass_from_dict(Optionals, {"a": "aValue"})
+
+    # evaluation
+    assert actual.a == "aValue"
+    assert actual.o is None