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bpo-46659: Update the test on the mbcs codec alias (GH-31168)

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encodings registers the _alias_mbcs() codec search function before
the search_function() codec search function. Previously, the
_alias_mbcs() was never used.

Fix the test_codecs.test_mbcs_alias() test: use the current ANSI code
page, not a fake ANSI code page number.

Remove the test_site.test_aliasing_mbcs() test: the alias is now
implemented in the encodings module, no longer in the site module.
This commit is contained in:
Victor Stinner 2022-02-06 21:50:09 +01:00 • committed by GitHub
parent 3da5526136
commit 04dd60e50c
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3 changed files with 15 additions and 19 deletions
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17
Lib/test/test_codecs.py
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@ -1904,7 +1904,10 @@ class BasicUnicodeTest(unittest.TestCase, MixInCheckStateHandling):
name += "_codec"
elif encoding == "latin_1":
name = "latin_1"
self.assertEqual(encoding.replace("_", "-"), name.replace("_", "-"))
# Skip the mbcs alias on Windows
if name != "mbcs":
self.assertEqual(encoding.replace("_", "-"),
name.replace("_", "-"))
(b, size) = codecs.getencoder(encoding)(s)
self.assertEqual(size, len(s), "encoding=%r" % encoding)
@ -3188,11 +3191,13 @@ class CodePageTest(unittest.TestCase):
self.assertEqual(decoded, ('abc', 3))
def test_mbcs_alias(self):
# Check that looking up our 'default' codepage will return
# mbcs when we don't have a more specific one available
with mock.patch('_winapi.GetACP', return_value=123):
codec = codecs.lookup('cp123')
self.assertEqual(codec.name, 'mbcs')
# On Windows, the encoding name must be the ANSI code page
encoding = locale.getpreferredencoding(False)
self.assertTrue(encoding.startswith('cp'), encoding)
# The encodings module create a "mbcs" alias to the ANSI code page
codec = codecs.lookup(encoding)
self.assertEqual(codec.name, "mbcs")
@support.bigmemtest(size=2**31, memuse=7, dry_run=False)
def test_large_input(self, size):