add create DICT and LIST from JSON string

tests/test_dict_nodes.py

@@ -11,6 +11,7 @@ from src.basic_data_handling.dict_nodes import (
     DictCreateFromItemsList,
     DictCreateFromLists,
     DictCreateFromString,
+    DictCreateFromJSONString,
     DictExcludeKeys,
     DictFilterByKeys,
     DictFromKeys,
@@ -112,6 +113,20 @@ def test_dict_create_from_string():
     assert node.create() == ({},)
 
 
+def test_dict_create_from_json_string():
+    node = DictCreateFromJSONString()
+    # Single-line JSON object
+    assert node.create_from_json('{\n  "key1": "value1",\n  "key2": 2\n}') == ({"key1": "value1", "key2": 2},)
+    # Empty object
+    assert node.create_from_json("{}") == ({},)
+    # JSON array is not a valid object -> error
+    with pytest.raises(ValueError, match="JSON object"):
+        node.create_from_json("[1, 2, 3]")
+    # Malformed JSON -> error
+    with pytest.raises(ValueError):
+        node.create_from_json("{not json}")
+
+
 def test_dict_create_from_items_datalist():
     node = DictCreateFromItemsDataList()
     assert node.create_from_items(item=[("key1", "value1"), ("key2", "value2")]) == (_dict_x2,)

tests/test_list_nodes.py

@@ -10,6 +10,7 @@ from src.basic_data_handling.list_nodes import (
     ListCreateFromFloat,
     ListCreateFromInt,
     ListCreateFromString,
+    ListCreateFromJSONString,
     ListEnumerate,
     ListExtend,
     ListFirst,
@@ -257,6 +258,22 @@ def test_list_create_from_string():
     assert node.create_list() == ([],)
 
 
+def test_list_create_from_json_string():
+    node = ListCreateFromJSONString()
+    # Multiline JSON array
+    assert node.create_from_json('[\n  1,\n  2,\n  3\n]') == ([1, 2, 3],)
+    # Empty array
+    assert node.create_from_json("[]") == ([],)
+    # Mix of JSON types
+    assert node.create_from_json('["a", 1, true, null]') == (["a", 1, True, None],)
+    # JSON object is not a valid array -> error
+    with pytest.raises(ValueError, match="JSON array"):
+        node.create_from_json('{"a": 1}')
+    # Malformed JSON -> error
+    with pytest.raises(ValueError):
+        node.create_from_json("[1, 2,")
+
+
 def test_list_to_data_list():
     node = ListToDataList()
     input_list = [1, 2, 3]