Add more tests for Python 3 Metaclasses

Author: anivegesana

dill/_dill.py

@@ -1746,7 +1746,6 @@ def save_type(pickler, obj, postproc_list=None):
         logger.trace(pickler, "# T7")
 
     else:
-        obj_name = getattr(obj, '__qualname__', getattr(obj, '__name__', None))
         _byref = getattr(pickler, '_byref', None)
         obj_recursive = id(obj) in getattr(pickler, '_postproc', ())
         incorrectly_named = not _locate_function(obj, pickler)

dill/tests/test_classdef.py

@@ -7,6 +7,7 @@
 #  - https://github.com/uqfoundation/dill/blob/master/LICENSE
 
 import dill
+from enum import EnumMeta
 import sys
 dill.settings['recurse'] = True
 
@@ -97,6 +98,7 @@ def test_specialtypes():
     assert dill.pickles(type(None))
     assert dill.pickles(type(NotImplemented))
     assert dill.pickles(type(Ellipsis))
+    assert dill.pickles(type(EnumMeta))
 
 from collections import namedtuple
 Z = namedtuple("Z", ['a','b'])
@@ -107,13 +109,17 @@ def test_specialtypes():
 Xi = X(0,1)
 Bad = namedtuple("FakeName", ['a','b'])
 Badi = Bad(0,1)
+Defaults = namedtuple('Defaults', ['x', 'y'], defaults=[1])
+Defaultsi = Defaults(2)
 
 # test namedtuple
 def test_namedtuple():
     assert Z is dill.loads(dill.dumps(Z))
     assert Zi == dill.loads(dill.dumps(Zi))
     assert X is dill.loads(dill.dumps(X))
     assert Xi == dill.loads(dill.dumps(Xi))
+    assert Defaults is dill.loads(dill.dumps(Defaults))
+    assert Defaultsi == dill.loads(dill.dumps(Defaultsi))
     assert Bad is not dill.loads(dill.dumps(Bad))
     assert Bad._fields == dill.loads(dill.dumps(Bad))._fields
     assert tuple(Badi) == tuple(dill.loads(dill.dumps(Badi)))
@@ -221,11 +227,17 @@ def __init__(self, y):
 value = 123
 y = Y(value)
 
+class Y2(object):
+  __slots__ = 'y'
+  def __init__(self, y):
+    self.y = y
+
 def test_slots():
     assert dill.pickles(Y)
     assert dill.pickles(y)
     assert dill.pickles(Y.y)
     assert dill.copy(y).y == value
+    assert dill.copy(Y2(value)).y == value
 
 def test_origbases():
     assert dill.copy(customIntList).__orig_bases__ == customIntList.__orig_bases__
@@ -258,6 +270,12 @@ def __new__(cls):
 
     assert dill.copy(subclass_with_new())
 
+def test_enummeta():
+    from http import HTTPStatus
+    import enum
+    assert dill.copy(HTTPStatus.OK) is HTTPStatus.OK
+    assert dill.copy(enum.EnumMeta) is enum.EnumMeta
+
 if __name__ == '__main__':
     test_class_instances()
     test_class_objects()
@@ -270,3 +288,4 @@ def __new__(cls):
     test_slots()
     test_origbases()
     test_metaclass()
+    test_enummeta()