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gh-131178: Add tests for sysconfig command-line interface #139934

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5fcc793
Update test_sysconfig.py
LamentXU123 Oct 11, 2025
663642c
Update test_sysconfig.py
LamentXU123 Oct 11, 2025
9a01167
Update test_sysconfig.py
LamentXU123 Oct 11, 2025
85d0bc4
Fix lint CI
LamentXU123 Oct 11, 2025
ba7362d
fix CI
LamentXU123 Oct 11, 2025
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fix lint
LamentXU123 Oct 11, 2025
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Update test_sysconfig.py
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@LamentXU123
LamentXU123 authored Oct 11, 2025
commit 5fcc7935b7ade88c15d74054cb66fbc065d4d3ef
27 changes: 23 additions & 4 deletions Lib/test/test_sysconfig.py
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@
from sysconfig import (get_paths, get_platform, get_config_vars,
get_path, get_path_names, _INSTALL_SCHEMES,
get_default_scheme, get_scheme_names, get_config_var,
_expand_vars, _get_preferred_schemes,
_expand_vars, _get_preferred_schemes, get_python_version,
is_python_build, _PROJECT_BASE)
from sysconfig.__main__ import _main, _parse_makefile, _get_pybuilddir, _get_json_data_name
import _imp
Expand Down Expand Up @@ -770,7 +770,6 @@ def test_parse_makefile(self):
print("var8=$$(var3)", file=makefile)
print("var9=$(var10)(var3)", file=makefile)
print("var10=$$", file=makefile)
print("var11=$${ORIGIN}${var5}", file=makefile)
vars = _parse_makefile(TESTFN)
self.assertEqual(vars, {
'var1': 'ab42',
Expand All @@ -783,7 +782,6 @@ def test_parse_makefile(self):
'var8': '$(var3)',
'var9': '$(var3)',
'var10': '$',
'var11': '${ORIGIN}dollar$5',
})

def _test_parse_makefile_recursion(self):
Expand Down Expand Up @@ -880,6 +878,27 @@ def test_is_python_build_check_home(self):
):
sysconfig.is_python_build('foo')


class CommandLineTests(unittest.TestCase):
def test_config_output(self):
output = subprocess.run(

@cmaloney cmaloney Oct 11, 2025

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From what I can see in the base issue the pattern for these tests is to use contextlib.redirect_stdout + call the function which implements main directly (sysconfig._main) rather than run / use a subprocess.

See for example: https://github.com/python/cpython/pull/131275/files#diff-eabc91c9e7a2586ffc6ca849d6636e74e28825a4515745c280b045dbdf857e39R723-R727

That should also fix the WASI check which is currently failing with: OSError: [Errno 58] wasi does not support processes.

@LamentXU123 LamentXU123 Oct 12, 2025 •
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Ah! Thank you. I am really stuck on how to fix the WASI test.

[sys.executable, "-m", "sysconfig"],
capture_output=True,
text=True,
check=True
)
paths, vars = '', ''
for key, value in sorted(get_paths().items()):
paths += f'\t{key} = "{value}"\n'
for key, value in sorted(get_config_vars().items()):
vars += f'\t{key} = "{value}"\n'
mock_result = f'''Platform: "{get_platform()}"
Python version: "{get_python_version()}"
Current installation scheme: "{get_default_scheme()}"

Paths:
{paths}
Variables:
{vars}'''
self.assertTrue(output.stdout == mock_result)
if __name__ == "__main__":
unittest.main()