Add unittest for issue #25

Author: robabram

tests/test_json_with_lists.py

@@ -2,7 +2,8 @@
 # This file is subject to the terms and conditions defined in the
 # file 'LICENSE', which is part of this source code package.
 #
-from typing import List
+import json
+from typing import List, Optional
 
 from tests.base_test import BaseTestCase
 from python_easy_json import JSONObject
@@ -34,3 +35,30 @@ def test_data_with_lists(self):
         for i in obj.integer_list:
             self.assertIsInstance(i, int)
             self.assertIn(i, [1, 2, 3])
+
+    def test_nested_lists(self):
+        """ User supplied unittest for issue #25 """
+        class RR(JSONObject):
+            values: Optional[list[int]]  # here list is okay
+
+        class P(JSONObject):
+            R: List[RR]  # here list cannot be used
+
+        class Q(JSONObject):
+            W: List[P]  # and here too
+
+        class P2(JSONObject):
+            R: List[RR]  # here list cannot be used
+
+        class Q2(JSONObject):
+            W: List[P]  # and here too
+
+        data = json.loads('{"W": [{"R": [{"values": [1, 2, 3]}]}]}')
+        # OK
+        x = Q(data)
+        self.assertIsInstance(x, Q)
+
+        # list() takes no keyword arguments
+        data = json.loads('{"W": [{"R": [{"values": [1, 2, 3]}]}]}')
+        x2 = Q2(data)
+        self.assertIsInstance(x2, Q2)