Some test modules fail when run as a script

[Eclips4]

 C:\Users\KIRILL-1\CLionProjects\cpython> ./python Lib/test/test_module.py
Running Debug|x64 interpreter...
.....................F..............
======================================================================
FAIL: test_module_repr_with_full_loader (__main__.ModuleTests.test_module_repr_with_full_loader)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\KIRILL-1\CLionProjects\cpython\Lib\test\test_module.py", line 238, in test_module_repr_with_full_loader
    self.assertEqual(
AssertionError: "<module 'foo' (<class '__main__.FullLoader'>)>" != "<module 'foo' (<class 'test.test_module.FullLoader'>)>"      
- <module 'foo' (<class '__main__.FullLoader'>)>
?                        ^  ^^^^^
+ <module 'foo' (<class 'test.test_module.FullLoader'>)>
?                        ^^^^^^^^^  ^^^^^


----------------------------------------------------------------------
Ran 36 tests in 0.217s

FAILED (failures=1)

I'll soon send a PR to fix it.

Linked PRs

• gh-104057: Fix direct invocation of test_module #104059
• gh-104057: Fix direct invocation of test_super #104064
• gh-104057: Fix direct invocation of test_support #104069

[terryjreedy]

I grepped with IDLE for other candidates to fix.

Searching "<class 'test." in F:\dev\3x\Lib\test\*.py ...
F:\dev\3x\Lib\test\test_descrtut.py: 42:     <class 'test.test_descrtut.defaultdict'>
F:\dev\3x\Lib\test\test_descrtut.py: 49:     <class 'test.test_descrtut.defaultdict'>
F:\dev\3x\Lib\test\test_descrtut.py: 51:     <class 'test.test_descrtut.defaultdict'>
F:\dev\3x\Lib\test\test_descrtut.py: 267:     classmethod <class 'test.test_descrtut.C'> 1
F:\dev\3x\Lib\test\test_descrtut.py: 270:     classmethod <class 'test.test_descrtut.C'> 1
F:\dev\3x\Lib\test\test_descrtut.py: 276:     classmethod <class 'test.test_descrtut.D'> 1
F:\dev\3x\Lib\test\test_descrtut.py: 279:     classmethod <class 'test.test_descrtut.D'> 1
F:\dev\3x\Lib\test\test_descrtut.py: 295:     classmethod <class 'test.test_descrtut.C'> 1
F:\dev\3x\Lib\test\test_descrtut.py: 299:     classmethod <class 'test.test_descrtut.C'> 1
F:\dev\3x\Lib\test\test_metaclass.py: 121:     Prepare called: ('C', (<class 'test.test_metaclass.B'>, <class 'object'>)) {'other': 'haha'}
F:\dev\3x\Lib\test\test_module.py: 239:             repr(m), "<module 'foo' (<class 'test.test_module.FullLoader'>)>")
F:\dev\3x\Lib\test\test_pdb.py: 582:     <class 'test.test_pdb.MyClass'>
F:\dev\3x\Lib\test\test_typing.py: 120:             "<class 'test.test_typing.AnyTests.test_repr.<locals>.Sub'>",
Hits found: 13
(Hint: right-click to open locations.)

This caught the test_module line you just fixed. Some of these are in interactive output and I don't know if they will fail.

[Eclips4]

Yeah, I saw these lines, and this should be discussed. Otherwise, I found some another scenarios with the same issue (easy to fix).

[Eclips4]

However, I'll try to run file test_support on Windows and got interpreter crash. Can someone confirm that?
./python Lib/test/test_support.py
Cannot confirm this on Linux.
Please, use the current main branch if you try to reproduce it.

[terryjreedy]

main built yesterday

F:\dev\3x>python -m test.test_support
Running Debug|x64 interpreter...
.....................s.F..

Crash. Rebuild and try again. Same crash. "Debug assertion Failed."
File minkernel/ctrs/ucrt/src/appcrt/lowio/write.cpp line 50, expression (_osfile(fh) & FOPEN)

[Eclips4]

F:\dev\3x>python -m test.test_support
Running Debug|x64 interpreter...
.....................s.F..

Crash. Rebuild and try again. Same crash. "Debug assertion Failed."
File minkernel/ctrs/ucrt/src/appcrt/lowio/write.cpp line 50, expression (_osfile(fh) & FOPEN)

Thanks!
I think, it's a minimal reproducible example:

import os


def make_bad_fd():
    file = open("test_file.txt", "wb")
    try:
        return file.fileno()
    finally:
        file.close()



fd = make_bad_fd()
os.write(fd, b"foo")

[terryjreedy]

f:\dev\3x>python -m test -uall -v test_support runs fine.

Running test_support from IDLE editor: get same Assertion Failure box. After Ignore, failure is

.....................s.F.......s.........s...
======================================================================
FAIL: test_ignored_deprecations_are_silent (__main__.TestSupport.test_ignored_deprecations_are_silent)
Test support.ignore_deprecations_from() silences warnings
----------------------------------------------------------------------
Traceback (most recent call last):
  File "f:\dev\3x\Lib\test\test_support.py", line 52, in test_ignored_deprecations_are_silent
    self.assertEqual(len(messages), 0, messages)
AssertionError: 1 != 0 : ['You should NOT be seeing this.']

[Eclips4]

f:\dev\3x>python -m test -uall -v test_support runs fine.

Running test_support from IDLE editor: get same Assertion Failure box. After Ignore, failure is

.....................s.F.......s.........s...
======================================================================
FAIL: test_ignored_deprecations_are_silent (__main__.TestSupport.test_ignored_deprecations_are_silent)
Test support.ignore_deprecations_from() silences warnings
----------------------------------------------------------------------
Traceback (most recent call last):
  File "f:\dev\3x\Lib\test\test_support.py", line 52, in test_ignored_deprecations_are_silent
    self.assertEqual(len(messages), 0, messages)
AssertionError: 1 != 0 : ['You should NOT be seeing this.']

That's easy to fix. Just replace

        cls._test_support_token = support.ignore_deprecations_from(
            "test.test_support", like=".*You should NOT be seeing this.*"
        )

to this:

        cls._test_support_token = support.ignore_deprecations_from(
            __main__, like=".*You should NOT be seeing this.*"
        )