test_future4 ran no test

[vstinner]

BPO	35412
Nosy	@vstinner, @pablogsal, @miss-islington
PRs	bpo-35412: Skip test_multiprocessing_fork and test_multiprocessing_forkserver on Windows #11086 [3.6] bpo-35412: Skip test_multiprocessing_fork and test_multiprocessing_forkserver on Windows (GH-11086) #11115 [3.7] bpo-35412: Skip test_multiprocessing_fork and test_multiprocessing_forkserver on Windows (GH-11086) #11116 bpo-35412: Add testcase to test_future4 #11131 bpo-34279: regrtest consider that skipped tests are ran #11132 [3.7] bpo-34279: regrtest consider that skipped tests are ran (GH-11132) #11155 [3.6] bpo-34279: regrtest consider that skipped tests are ran (GH-11132) #11156 [2.7] bpo-34279: regrtest consider that skipped tests are ran (GH-11132) #11158 [3.7] bpo-35412: Add testcase to test_future4 (GH-11131) #11183

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2018-12-14.17:05:48.846>
created_at = <Date 2018-12-04.22:37:17.097>
labels = ['3.8']
title = 'test_future4 ran no test'
updated_at = <Date 2018-12-17.08:34:13.101>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2018-12-17.08:34:13.101>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2018-12-14.17:05:48.846>
closer = 'vstinner'
components = []
creation = <Date 2018-12-04.22:37:17.097>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 35412
keywords = ['patch']
message_count = 10.0
messages = ['331080', '331131', '331612', '331616', '331617', '331712', '331809', '331819', '331825', '331950']
nosy_count = 3.0
nosy_names = ['vstinner', 'pablogsal', 'miss-islington']
pr_nums = ['11086', '11115', '11116', '11131', '11132', '11155', '11156', '11158', '11183']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue35412'
versions = ['Python 3.8']

[vstinner]

Since bpo-34279 has been fixed, regrtest now logs a message when a test runs no test. I noticed that test_future4 logs such message:

...
0:05:23 load avg: 0.56 [152/412] test_future4
0:05:24 load avg: 0.56 [153/412] test_future5 -- test_future4 run no tests
...
2 tests run no tests:
test_dtrace test_future4

I can reproduce the issue:

$ ./python -m test test_future4
(...)
test_future4 run no tests
(...)
Tests result: NO TEST RUN

The test has been added by:
commit 62e2c7e
Author: Jeremy Hylton <jeremy@alum.mit.edu>
Date: Wed Feb 28 17:48:06 2001 +0000

Add regression test for future statements.  This adds eight files, but
seven are not tests in their own right; these files are mentioned in
regrtest.

diff --git a/Lib/test/test_future4.py b/Lib/test/test_future4.py
new file mode 100644
index 0000000000..805263be89
--- /dev/null
+++ b/Lib/test/test_future4.py
@@ -0,0 +1,10 @@
+"""This is a test"""
+import __future__
+from __future__ import nested_scopes
+
+def f(x):
+    def g(y):
+        return x + y
+    return g
+
+print f(2)(4)

... test removed by commit 3090694.

A file recreated by:

commit fa50bad
Author: Christian Heimes <christian@cheimes.de>
Date: Wed Mar 26 22:55:31 2008 +0000

I forgot to svn add the future test

... I guess that it's related to:

commit 3c60833
Author: Christian Heimes <christian@cheimes.de>
Date: Wed Mar 26 22:01:37 2008 +0000

Patch bpo-2477: Added from __future__ import unicode_literals

The new PyParser_*Ex() functions are based on Neal's suggestion and initial patch. The new __future__ feature makes all '' and r'' unicode strings. b'' and br'' stay (byte) strings.

(Other candidates: commit 342212c and commit 7f23d86.)

[vstinner]

There are a few more on Windows:

4 tests run no tests:
test_dtrace test_future4 test_multiprocessing_fork
test_multiprocessing_forkserver

test_multiprocessing_fork and test_multiprocessing_forkserver should raise SkipTest on Windows.

[pablogsal]

New changeset a932d0b by Pablo Galindo in branch 'master':
bpo-35412: Skip test_multiprocessing_fork and test_multiprocessing_forkserver on Windows (GH-11086)
a932d0b

[miss-islington]

New changeset d55a896 by Miss Islington (bot) in branch '3.7':
bpo-35412: Skip test_multiprocessing_fork and test_multiprocessing_forkserver on Windows (GH-11086)
d55a896

[miss-islington]

New changeset 9756876 by Miss Islington (bot) in branch '3.6':
bpo-35412: Skip test_multiprocessing_fork and test_multiprocessing_forkserver on Windows (GH-11086)
9756876

[vstinner]

New changeset 502fe19 by Victor Stinner in branch 'master':
bpo-35412: Add testcase to test_future4 (GH-11131)
502fe19

[vstinner]

New changeset 3a8f4fe by Victor Stinner in branch 'master':
bpo-34279: regrtest consider that skipped tests are ran (GH-11132)
3a8f4fe

[miss-islington]

New changeset 5f252e1 by Miss Islington (bot) in branch '3.7':
bpo-34279: regrtest consider that skipped tests are ran (GH-11132)
5f252e1

[vstinner]

New changeset 34b7c43 by Victor Stinner in branch '2.7':
bpo-34279: regrtest consider that skipped tests are ran (GH-11132) (GH-11158)
34b7c43

[vstinner]

New changeset 2d91a13 by Victor Stinner (Miss Islington (bot)) in branch '3.7':
bpo-35412: Add testcase to test_future4 (GH-11131) (GH-11183)
2d91a13