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bpo-37529: Add test for guessing extensions (GH-28243)

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Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>
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andrei kulakov 2022-03-12 12:26:17 -05:00 • committed by GitHub
parent af2277e461
commit d9db07a310
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Lib/test/test_mimetypes.py
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@ -159,6 +159,15 @@ class MimeTypesTestCase(unittest.TestCase):
# Poison should be gone.
self.assertEqual(mimetypes.guess_extension('foo/bar'), None)
@unittest.skipIf(sys.platform.startswith("win"), "Non-Windows only")
def test_guess_known_extensions(self):
# Issue 37529
# The test fails on Windows because Windows adds mime types from the Registry
# and that creates some duplicates.
from mimetypes import types_map
for v in types_map.values():
self.assertIsNotNone(mimetypes.guess_extension(v))
def test_preferred_extension(self):
def check_extensions():
self.assertEqual(mimetypes.guess_extension('application/octet-stream'), '.bin')