Test values which do not fit in C integer types

Author: serhiy-storchaka

Lib/test/test_io/test_textio.py

@@ -1458,6 +1458,10 @@ def test_chunk_size(self):
             t._CHUNK_SIZE = 0
         with self.assertRaises(TypeError):
             t._CHUNK_SIZE = 'x'
+        with self.assertRaises(ValueError):
+            t._CHUNK_SIZE = sys.maxsize + 1
+        with self.assertRaises(ValueError):
+            t._CHUNK_SIZE = -sys.maxsize - 2
         with self.assertRaises(ValueError):
             t._CHUNK_SIZE = 2**1000
         with self.assertRaises(ValueError):

Lib/test/test_pickle.py

@@ -398,6 +398,10 @@ def test_c_pickler_attributes(self):
                         self.assertEqual(getattr(pickler, name), int(value))
                     with self.assertRaises(TypeError):
                         setattr(pickler, name, 'x')
+                    with self.assertRaises(OverflowError):
+                        setattr(pickler, name, sys.maxsize + 1)
+                    with self.assertRaises(OverflowError):
+                        setattr(pickler, name, -sys.maxsize - 2)
                     with self.assertRaises(OverflowError):
                         setattr(pickler, name, 2**1000)
                     with self.assertRaises(OverflowError):