test: add tests on deepcopying of domains and problems

tests/test_domain.py

@@ -11,6 +11,7 @@
 #
 
 """This module contains tests for a PDDL domain."""
+import copy
 import pickle  # nosec
 import re
 
@@ -34,6 +35,13 @@ def test_pickle_domain(domain_obj: Domain) -> None:
     assert domain_obj == actual_domain_obj
 
 
+@pytest.mark.parametrize("domain_obj", pddl_objects_domains)
+def test_deepcopy_domain(domain_obj: Domain) -> None:
+    """Test that domain objects can be deepcopied correctly."""
+    new_domain_obj = copy.deepcopy(domain_obj)
+    assert domain_obj == new_domain_obj
+
+
 class TestDomainEmpty:
     """Test the empty domain."""
 

tests/test_problem.py

@@ -11,6 +11,7 @@
 #
 
 """This module contains tests for a PDDL problem."""
+import copy
 import pickle  # nosec
 from unittest.mock import MagicMock
 
@@ -31,6 +32,13 @@ def test_pickle_problem(problem_obj: Problem) -> None:
     assert problem_obj == actual_problem_obj
 
 
+@pytest.mark.parametrize("problem_obj", pddl_objects_problems)
+def test_deepcopy_problem(problem_obj: Problem) -> None:
+    """Test that problem objects can be deepcopied correctly."""
+    new_problem_obj = copy.deepcopy(problem_obj)
+    assert problem_obj == new_problem_obj
+
+
 class TestProblemEmpty:
     """Test the empty problem."""