Re-add deepcopy signature and tests.

bsb/config/_make.py

@@ -585,10 +585,11 @@ def get_tree(instance):
 
 
 def make_copyable(node_cls):
-    def loc_copy(instance):
+    def loc_copy(instance, memo=None):
         return type(instance)(instance.__tree__())
 
     node_cls.__copy__ = loc_copy
+    node_cls.__deepcopy__ = loc_copy
 
 
 def walk_node_attributes(node):

tests/test_configuration.py

@@ -1288,6 +1288,10 @@ class Test:
 
 class TestCopy(unittest.TestCase):
     def test_copy(self):
+        """
+        Check copy and deepcopy functions for the nodes.
+        """
+
         @config.node
         class SubClass:
             c = config.attr(
@@ -1306,6 +1310,12 @@ class MainClass:
         instance = MainClass({"a": {"c": tab}, "b": 3.0})
         copied = instance.__copy__()
         self.assertTrue(id(instance.a) != id(copied.a))
+        # check that the c arrays elements are equals
+        self.assertTrue(np.all(instance.a.c == copied.a.c))
+        self.assertEqual(instance.b, copied.b)
+        copied = instance.__deepcopy__()
+        self.assertTrue(id(instance.a) != id(copied.a))
+        # check that the c arrays elements are equals
         self.assertTrue(np.all(instance.a.c == copied.a.c))
         self.assertEqual(instance.b, copied.b)