Merge pull request #31 from jetavator/issue-6-Implement_copy_and_deep…

…copy_without_relying_on_dict_and_list_implementations

Implement and test copy and deepcopy

features/dict.feature

@@ -109,6 +109,8 @@ Feature: Test JSON DOM objects
       schema(example).is_valid(example_dict_input)
       schema(example).jsonschema_dict == expected_schema
       example_dict_output == example_dict_input
+      copy.copy(example).to_builtin() == example_dict_input
+      copy.deepcopy(example).to_builtin() == example_dict_input
       """
 
   Scenario: Test bad input string

features/steps/steps.py

@@ -6,6 +6,7 @@
 import importlib.util
 import yaml
 import json
+import copy
 
 
 @given("the Python module {module}.py")

wysdom/dom/DOMDict.py

@@ -1,10 +1,13 @@
 from __future__ import annotations
 
-from typing import Generic, TypeVar, Optional, Any
+from typing import Generic, TypeVar, Optional, Any, Dict
 
 from collections.abc import Mapping
 
+from copy import deepcopy
+
 from ..base_schema import Schema, SchemaAnything
+from .DOMElement import DOMElement
 from .DOMObject import DOMObject
 from . import DOMInfo
 from .DOMProperties import DOMProperties
@@ -32,3 +35,17 @@ def __init__(
 
     def __getitem__(self, key: str) -> T_co:
         return super().__getitem__(key)
+
+    def __deepcopy__(self, memo: Dict[int, DOMElement]) -> DOMDict:
+        cls = self.__class__
+        # noinspection PyArgumentList
+        result = cls(
+            value={
+                k: deepcopy(v, memo)
+                for k, v in self.items()
+            },
+            json_dom_info=self.__json_dom_info__,
+            _item_type=self.__json_schema_properties__.additional_properties
+        )
+        memo[id(self)] = result
+        return result

wysdom/dom/DOMList.py

@@ -121,6 +121,11 @@ def __copy__(self) -> DOMList:
 
     def __deepcopy__(self, memo: Dict[int, DOMElement]) -> DOMList:
         cls = self.__class__
-        result = cls(deepcopy(list(self), memo))
+        # noinspection PyArgumentList
+        result = cls(
+            value=(deepcopy(x, memo) for x in self),
+            json_dom_info=self.__json_dom_info__,
+            _item_type=self.item_type
+        )
         memo[id(self)] = result
         return result

wysdom/dom/DOMObject.py

@@ -104,6 +104,13 @@ def __copy__(self) -> DOMObject:
 
     def __deepcopy__(self, memo: Dict[int, DOMElement]) -> DOMObject:
         cls = self.__class__
-        result = cls(deepcopy(dict(self), memo))
+        # noinspection PyArgumentList
+        result = cls(
+            value={
+                k: deepcopy(v, memo)
+                for k, v in self.items()
+            },
+            json_dom_info=self.__json_dom_info__
+        )
         memo[id(self)] = result
         return result