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25 changes: 20 additions & 5 deletions Lib/platform.py
Original file line number Diff line number Diff line change
Expand Up @@ -1464,9 +1464,24 @@ def invalidate_caches():

### Command line interface

if __name__ == '__main__':
# Default is to print the aliased verbose platform string
terse = ('terse' in sys.argv or '--terse' in sys.argv)
aliased = (not 'nonaliased' in sys.argv and not '--nonaliased' in sys.argv)
print(platform(aliased, terse))
def _parse_args(args: list[str] | None):
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("--terse", action="store_true")
parser.add_argument("--nonaliased", action="store_true")

return parser.parse_args(args)


def _main(args: list[str] | None = None):
args = _parse_args(args)

aliased = not args.nonaliased

print(platform(aliased, args.terse))


if __name__ == "__main__":
_main()
sys.exit(0)
51 changes: 51 additions & 0 deletions Lib/test/test_platform.py
Original file line number Diff line number Diff line change
@@ -1,11 +1,15 @@
import io
import itertools
import os
import copy
import contextlib
import pickle
import platform
import subprocess
import sys
import unittest
from unittest import mock
from textwrap import dedent

from test import support
from test.support import os_helper
Expand Down Expand Up @@ -741,5 +745,52 @@ def test_parse_os_release(self):
self.assertEqual(len(info["SPECIALS"]), 5)


class CommandLineTest(unittest.TestCase):
def setUp(self):
self.clear_caches()
self.addCleanup(self.clear_caches)

def clear_caches(self):
platform._platform_cache.clear()
platform._sys_version_cache.clear()
platform._uname_cache = None
platform._os_release_cache = None

@staticmethod
def text_normalize(string):
"""Dedent *string* and strip it from its surrounding whitespaces.
This method is used by the other utility functions so that any
string to write or to match against can be freely indented.
"""
return dedent(string).strip()

def invoke_platform(self, *flags):
output = io.StringIO()
with contextlib.redirect_stdout(output):
platform._main(args=flags)
return self.text_normalize(output.getvalue())

def test_unknown_flag(self):
with self.assertRaises(SystemExit):
# suppress argparse error message
with contextlib.redirect_stderr(io.StringIO()):
_ = self.invoke_platform('--unknown')

def test_invocation(self):
self.invoke_platform("--terse", "--nonaliased")
self.invoke_platform("--nonaliased")
self.invoke_platform("--terse")
self.invoke_platform()

def test_help(self):
output = io.StringIO()

with self.assertRaises(SystemExit):
with contextlib.redirect_stdout(output):
platform._main(args=["--help"])

self.assertIn("usage:", output.getvalue())


if __name__ == '__main__':
unittest.main()
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