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GeezerVison is showing github.com — gh-131178: Add tests for `ftplib` command-line interface by rudy-07 · Pull Request #161080 · python/cpython

gh-131178: Add tests for ftplib command-line interface #161080

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Merged
orsenthil merged 3 commits into python:main from rudy-07:test-ftplib-cli
Nov 1, 2026

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Merged

gh-131178: Add tests for ftplib command-line interface #161080

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31c2aa7
gh-131178: Add tests for ftplib command-line interface
rudy-07 Nov 1, 2026
2f1b646
gh-131178: Fix requires_subprocess decorator syntax and isolate netrc…
rudy-07 Nov 1, 2026
35c8cfc
Delete Misc/NEWS.d/next/Tests/2026-11-01-19-45-00.gh-issue-131178.ftp…
orsenthil Nov 1, 2026
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68 changes: 68 additions & 0 deletions 68 Lib/test/test_ftplib.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1191,6 +1191,74 @@ def test__all__(self):
support.check__all__(self, ftplib, not_exported=not_exported)


class CommandLineTest(TestCase):
"""Tests for the ftplib command-line interface."""

def test_main_no_arguments_prints_usage(self):
with mock.patch('sys.argv', ['ftplib']), \
support.captured_stdout() as stdout:
with self.assertRaises(SystemExit) as cm:
ftplib.test()
self.assertEqual(cm.exception.code, 0)
output = stdout.getvalue()
self.assertIn('Usage:', output)
self.assertIn('Options:', output)
self.assertIn('Commands:', output)

@requires_subprocess()
def test_subprocess_invocation_no_args(self):
from test.support.script_helper import assert_python_ok
rc, out, err = assert_python_ok('-m', 'ftplib')
self.assertEqual(rc, 0)
self.assertIn(b'Usage:', out)
self.assertIn(b'Options:', out)
self.assertIn(b'Commands:', out)
self.assertEqual(err, b'')

@mock.patch('ftplib.FTP')
@mock.patch('netrc.netrc', side_effect=OSError)
def test_cli_host_and_debugging(self, mock_netrc, mock_ftp_cls):
mock_ftp = mock_ftp_cls.return_value
with mock.patch('sys.argv', ['ftplib', '-d', '-d', 'example.com']):
ftplib.test()
mock_ftp_cls.assert_called_once_with('example.com')
mock_ftp.set_debuglevel.assert_called_once_with(2)
mock_ftp.login.assert_called_once_with('', '', '')
mock_ftp.quit.assert_called_once()

@mock.patch('ftplib.FTP')
@mock.patch('netrc.netrc', side_effect=OSError)
def test_cli_commands(self, mock_netrc, mock_ftp_cls):
mock_ftp = mock_ftp_cls.return_value
with mock.patch('sys.argv', ['ftplib', 'example.com', '-l/pub', '-d/incoming', '-p']):
ftplib.test()
mock_ftp_cls.assert_called_once_with('example.com')
mock_ftp.dir.assert_called_once_with('/pub')
mock_ftp.sendcmd.assert_called_once_with('CWD /incoming')
mock_ftp.set_pasv.assert_called_once()
mock_ftp.quit.assert_called_once()

@mock.patch('ftplib.FTP')
@mock.patch('netrc.netrc', side_effect=OSError)
def test_cli_retrieve_file(self, mock_netrc, mock_ftp_cls):
mock_ftp = mock_ftp_cls.return_value
with mock.patch('sys.argv', ['ftplib', 'example.com', 'testfile.txt']):
ftplib.test()
mock_ftp.retrbinary.assert_called_once()
args, kwargs = mock_ftp.retrbinary.call_args
self.assertEqual(args[0], 'RETR testfile.txt')
mock_ftp.quit.assert_called_once()

@mock.patch('ftplib.FTP')
@mock.patch('netrc.netrc', side_effect=OSError('file not found'))
def test_cli_custom_rcfile_error(self, mock_netrc, mock_ftp_cls):
with mock.patch('sys.argv', ['ftplib', '-rnonexistent.netrc', 'example.com']), \
support.captured_stderr() as stderr:
ftplib.test()
self.assertIn("Could not open account file -- using anonymous login.",
stderr.getvalue())


def setUpModule():
thread_info = threading_helper.threading_setup()
unittest.addModuleCleanup(threading_helper.threading_cleanup, *thread_info)
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