[issue30683] Enhance doctest support in regrtest --list-cases

[STINNER Victor]

STINNER Victor added the comment:

I have no idea how to implement this idea. I'm not interested to work on this 
topic, so I just close this issue. If someone wants to work on this topic, 
please open a new issue.

--
resolution:  -> out of date
stage:  -> resolved
status: open -> closed

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[issue30683] Enhance doctest support in regrtest --list-cases

[STINNER Victor]

STINNER Victor added the comment:

> Note that --match (and --matchfile) is ignored by doctests, so technically, 
> it seems that it's doable ;-)

In test_os, --match works on doctest tests:

haypo@selma$ ./python -m test -v test_builtin --match=builtins.hex 
(...)
0:00:00 load avg: 0.28 [1/1] test_builtin
hex (builtins)
Doctest: builtins.hex ... ok

--
Ran 1 test in 0.002s
(...)

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[issue30683] Enhance doctest support in regrtest --list-cases

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Note that --match (and --matchfile) is ignored by doctests. I think this can 
cause a problem for bisect feature. After making --match working with doctests 
we can found a way to name doctests and list them.

--
nosy: +serhiy.storchaka

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[issue30683] Enhance doctest support in regrtest --list-cases

[STINNER Victor]

New submission from STINNER Victor:

bpo-30523 added a new --list-cases command to regrtest to list test methods. It 
is able to list doctest tests in test_builtins, but not in test_extcall.

test_builtin doctest tests:

haypo@selma$ ./python -m test test_builtin --list-cases|grep ^builtins
builtins.bin
builtins.float.as_integer_ratio
...


test_builtins works because it uses:

def load_tests(loader, tests, pattern):
from doctest import DocTestSuite
tests.addTest(DocTestSuite(builtins))
return tests

Listing test methods of test_extcall doesn't work, the following command has no 
output (but succeed):

./python -m test test_extcall --list-cases

test_extcall uses:

def test_main():
support.run_doctest(sys.modules[__name__], True)

I see two options:

* Replace support.run_doctest() with doctest.DocTestSuite() in all tests
* Enhance --list-cases to discover doctests. support.run_doctest() calls 
doctest.testmod(), but doctest.testmod() has no API to list tests. testmod() 
lists tests and directly runs them. Maybe --list-cases can reuse 
doctest.DocTestSuite(), I don't know.

--
components: Tests
messages: 296179
nosy: haypo
priority: normal
severity: normal
status: open
title: Enhance doctest support in regrtest --list-cases
type: enhancement
versions: Python 3.7

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