[Python-checkins] bpo-46387: test all pickle protos in `test_field_descriptor` in `test_collections` (GH-30614)

[rhettinger]

https://github.com/python/cpython/commit/37eab55ac9da6b6361f136a1da15bfcef12ed954
commit: 37eab55ac9da6b6361f136a1da15bfcef12ed954
branch: main
author: Nikita Sobolev <mail at sobolevn.me>
committer: rhettinger <rhettinger at users.noreply.github.com>
date: 2022-01-15T22:33:28-06:00
summary:

bpo-46387: test all pickle protos in `test_field_descriptor` in `test_collections` (GH-30614)

files:
M Lib/test/test_collections.py

diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index 48327bf50ea42..3a16045c5aa1a 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -677,14 +677,16 @@ def test_field_descriptor(self):
         self.assertRaises(AttributeError, Point.x.__set__, p, 33)
         self.assertRaises(AttributeError, Point.x.__delete__, p)
 
-        class NewPoint(tuple):
-            x = pickle.loads(pickle.dumps(Point.x))
-            y = pickle.loads(pickle.dumps(Point.y))
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            with self.subTest(proto=proto):
+                class NewPoint(tuple):
+                    x = pickle.loads(pickle.dumps(Point.x, proto))
+                    y = pickle.loads(pickle.dumps(Point.y, proto))
 
-        np = NewPoint([1, 2])
+                np = NewPoint([1, 2])
 
-        self.assertEqual(np.x, 1)
-        self.assertEqual(np.y, 2)
+                self.assertEqual(np.x, 1)
+                self.assertEqual(np.y, 2)
 
     def test_new_builtins_issue_43102(self):
         obj = namedtuple('C', ())