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gh-131178: Add tests for mimetypes command-line interface by htjworld · Pull Request #149681 · python/cpython · GitHub

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gh-131178: Add tests for mimetypes command-line interface #149681

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gh-131178: Add tests for mimetypes command-line interface #149681

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49 changes: 48 additions & 1 deletion Lib/test/test_mimetypes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,9 @@
import unittest.mock
from platform import win32_edition
from test import support
from test.support import cpython_only, force_not_colorized, os_helper
from test.support import cpython_only, force_not_colorized, os_helper, requires_subprocess
from test.support.import_helper import ensure_lazy_imports
from test.support.script_helper import assert_python_ok, assert_python_failure

try:
import _winapi
Expand Down Expand Up @@ -508,5 +509,51 @@ def test_invocation_error(self):
self.assertEqual(result, expected)


@requires_subprocess()
class CommandLineSubprocessTest(unittest.TestCase):
def test_help(self):
rc, stdout, stderr = assert_python_ok('-m', 'mimetypes', '--help')
self.assertIn(b'mimetypes', stdout)
self.assertIn(b'--help', stdout)
self.assertIn(b'--extension', stdout)
self.assertIn(b'--lenient', stdout)

def test_type_lookup(self):
rc, stdout, stderr = assert_python_ok('-m', 'mimetypes', 'foo.pdf')
self.assertIn(b'application/pdf', stdout)

def test_type_lookup_unknown(self):
rc, stdout, stderr = assert_python_failure('-m', 'mimetypes', 'foo.unknownext12345')
self.assertIn(b'error:', stdout)

def test_extension_flag(self):
rc, stdout, stderr = assert_python_ok('-m', 'mimetypes', '-e', 'image/jpeg')
self.assertIn(b'.jpg', stdout)

def test_extension_flag_unknown(self):
rc, stdout, stderr = assert_python_failure('-m', 'mimetypes', '-e', 'image/unknowntype12345')
self.assertIn(b'error:', stdout)

def test_lenient_flag(self):
rc, stdout, stderr = assert_python_ok('-m', 'mimetypes', '--lenient', 'foo.webp')
self.assertIn(b'image/webp', stdout)

def test_multiple_inputs(self):
rc, stdout, stderr = assert_python_ok('-m', 'mimetypes', 'foo.pdf', 'foo.png')
self.assertIn(b'application/pdf', stdout)
self.assertIn(b'image/png', stdout)

def test_multiple_inputs_with_error(self):
rc, stdout, stderr = assert_python_failure(
'-m', 'mimetypes', 'foo.pdf', 'foo.unknownext12345'
)
self.assertIn(b'application/pdf', stdout)
self.assertIn(b'error:', stdout)

def test_unknown_flag(self):
rc, stdout, stderr = assert_python_failure('-m', 'mimetypes', '--unknown-flag')
self.assertNotEqual(rc, 0)


if __name__ == "__main__":
unittest.main()
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Tests/2026-05-11-23-26-02.gh-issue-131178.Y2o6Dt.rst
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@@ -0,0 +1 @@
Add tests for the :mod:`mimetypes` command-line interface.
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