From: Chih-Hsuan Yen <yan12125@gmail.com>
Date: Mon, 13 Apr 2020 22:00:16 +0000 (+0800)
Subject: bpo-39481: fix test_genericalias on Android (GH-19469)
X-Git-Tag: v3.9.0a6~137
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=25a6833f7945f14cad83509ec73954d0ad70bdb1;p=thirdparty%2FPython%2Fcpython.git

bpo-39481: fix test_genericalias on Android (GH-19469)

Android bionic does not implement shm_open/shm_unlink [1].
As a result _posixshmem extension does not exist and
multiprocessing.shared_memory cannot be imported.

[1] https://android.googlesource.com/platform/bionic/+/master/docs/status.md
---

diff --git a/Lib/test/test_genericalias.py b/Lib/test/test_genericalias.py
index a00899f5267d..02b72838277e 100644
--- a/Lib/test/test_genericalias.py
+++ b/Lib/test/test_genericalias.py
@@ -19,7 +19,11 @@ from itertools import chain
 from http.cookies import Morsel
 from multiprocessing.managers import ValueProxy
 from multiprocessing.pool import ApplyResult
-from multiprocessing.shared_memory import ShareableList
+try:
+    from multiprocessing.shared_memory import ShareableList
+except ImportError:
+    # multiprocessing.shared_memory is not available on e.g. Android
+    ShareableList = None
 from multiprocessing.queues import SimpleQueue
 from os import DirEntry
 from re import Pattern, Match
@@ -71,6 +75,8 @@ class BaseTest(unittest.TestCase):
                   Future, _WorkItem,
                   Morsel,
                   ):
+            if t is None:
+                continue
             tname = t.__name__
             with self.subTest(f"Testing {tname}"):
                 alias = t[int]