testing: another try

dill/_dill.py

@@ -364,31 +364,35 @@ def dumps(obj, protocol=None, byref=None, fmode=None, recurse=None, portable=Non
     """
     if os.environ.get('CI') and \
             getattr(obj, '__qualname__', None) != 'test_getstate.<locals>.<lambda>' and \
-            not (os.environ.get('TRAVIS') and \
-                obj.__module__ == 'numpy' if isinstance(obj, type) else any(base.__module__ == 'numpy' for base in type(obj).mro())) and \
             __file__ != 'test_session.py':
         _test_portable(obj, protocol, byref, fmode, recurse, **kwds)
     file = StringIO()
     dump(obj, file, protocol, byref, fmode, recurse, portable, **kwds)#, strictio)
     return file.getvalue()
 
+_tempd = None
 def _test_portable(obj, protocol, byref, fmode, recurse, **kwds):
-    import dill, subprocess, tempfile, textwrap
+    import atexit, dill, subprocess, tempfile, textwrap
     try:
         import pox
         python = pox.which_python(version=True, fullpath=False) or 'python'
     except ImportError:
         python = 'python'
 
+    global _tempd
+    if _tempd is None:
+        import shutil
+        from importlib.util import find_spec
+        _tempd = tempfile.mkdtemp()
+        atexit.register(shutil.rmtree, _tempd)
+        os.symlink(os.path.dirname(find_spec('numpy').origin), os.path.join(_tempd, 'numpy'), True)
+        os.symlink(find_spec('dill._objects').origin, os.path.join(_tempd, '_objects.py'))
     temp = tempfile.NamedTemporaryFile()
+
     script = textwrap.dedent(f"""\
         import importlib, os, pickle, sys, types
         dill_spec = importlib.util.find_spec('dill')
-        if os.path.exists(os.path.join('dill', '__init__.py')):
-            sys.path.insert(0, 'dill')  # for _objects
-            sys.path.remove('')
         while (spec := importlib.util.find_spec("dill")) is not None:
-            sys.path.insert(0, os.path.dirname(spec.origin))
             sys.path.remove(os.path.dirname(os.path.dirname(spec.origin)))
         try:
             with open("{temp.name}", "rb") as f: pickle.load(f)
@@ -417,7 +421,7 @@ def _test_portable(obj, protocol, byref, fmode, recurse, **kwds):
             if all('Cannot locate reference' not in str(warn.message) for warn in warns):
                 temp.file.flush()
                 dill_path = os.path.dirname(dill.__path__[0])
-                subprocess.run(python, input=script, check=True)
+                subprocess.run(python, input=script, cwd=_tempd, check=True)
         finally:
             warnings.simplefilter('error')
             temp.file.close()