[Python-checkins] [3.13] gh-130655: Add a test for big-endian MO files in gettext (GH-132469) (GH-133248)

[serhiy-storchaka]

https://github.com/python/cpython/commit/90c786e377b98eeba93b91c05f8a3527d7868a6b
commit: 90c786e377b98eeba93b91c05f8a3527d7868a6b
branch: 3.13
author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com>
committer: serhiy-storchaka <storch...@gmail.com>
date: 2025-05-01T11:36:06Z
summary:

[3.13] gh-130655: Add a test for big-endian MO files in gettext (GH-132469) 
(GH-133248)

(cherry picked from commit 474f296718eb59391c929eec0e4c3df5fc11fb96)

Co-authored-by: Tomas R <tomas.ro...@gmail.com>

files:
M Lib/test/test_gettext.py

diff --git a/Lib/test/test_gettext.py b/Lib/test/test_gettext.py
index 7c7f1f84760a64..17299153295903 100644
--- a/Lib/test/test_gettext.py
+++ b/Lib/test/test_gettext.py
@@ -117,6 +117,23 @@
     0x62, 0x61, 0x72, 0x00,  # Message data
 ]))
 
+
+GNU_MO_DATA_BIG_ENDIAN = base64.b64encode(bytes([
+    0x95, 0x04, 0x12, 0xDE,  # Magic
+    0x00, 0x00, 0x00, 0x00,  # Version
+    0x00, 0x00, 0x00, 0x01,  # Message count
+    0x00, 0x00, 0x00, 0x1C,  # Message offset
+    0x00, 0x00, 0x00, 0x24,  # Translation offset
+    0x00, 0x00, 0x00, 0x00,  # Hash table size
+    0x00, 0x00, 0x00, 0x2C,  # Hash table offset
+    0x00, 0x00, 0x00, 0x03,  # 1st message length
+    0x00, 0x00, 0x00, 0x2C,  # 1st message offset
+    0x00, 0x00, 0x00, 0x03,  # 1st trans length
+    0x00, 0x00, 0x00, 0x30,  # 1st trans offset
+    0x66, 0x6F, 0x6F, 0x00,  # Message data
+    0x62, 0x61, 0x72, 0x00,  # Message data
+]))
+
 UMO_DATA = b'''\
 3hIElQAAAAADAAAAHAAAADQAAAAAAAAAAAAAAAAAAABMAAAABAAAAE0AAAAQAAAAUgAAAA8BAABj
 AAAABAAAAHMBAAAWAAAAeAEAAABhYsOeAG15Y29udGV4dMOeBGFiw54AUHJvamVjdC1JZC1WZXJz
@@ -144,6 +161,7 @@
 MOFILE_BAD_MAJOR_VERSION = os.path.join(LOCALEDIR, 
'gettext_bad_major_version.mo')
 MOFILE_BAD_MINOR_VERSION = os.path.join(LOCALEDIR, 
'gettext_bad_minor_version.mo')
 MOFILE_CORRUPT = os.path.join(LOCALEDIR, 'gettext_corrupt.mo')
+MOFILE_BIG_ENDIAN = os.path.join(LOCALEDIR, 'gettext_big_endian.mo')
 UMOFILE = os.path.join(LOCALEDIR, 'ugettext.mo')
 MMOFILE = os.path.join(LOCALEDIR, 'metadata.mo')
 
@@ -170,6 +188,8 @@ def setUpClass(cls):
             fp.write(base64.decodebytes(GNU_MO_DATA_BAD_MINOR_VERSION))
         with open(MOFILE_CORRUPT, 'wb') as fp:
             fp.write(base64.decodebytes(GNU_MO_DATA_CORRUPT))
+        with open(MOFILE_BIG_ENDIAN, 'wb') as fp:
+            fp.write(base64.decodebytes(GNU_MO_DATA_BIG_ENDIAN))
         with open(UMOFILE, 'wb') as fp:
             fp.write(base64.decodebytes(UMO_DATA))
         with open(MMOFILE, 'wb') as fp:
@@ -319,6 +339,12 @@ def test_corrupt_file(self):
             self.assertEqual(exception.strerror, "File is corrupt")
             self.assertEqual(exception.filename, MOFILE_CORRUPT)
 
+    def test_big_endian_file(self):
+        with open(MOFILE_BIG_ENDIAN, 'rb') as fp:
+            t = gettext.GNUTranslations(fp)
+
+        self.assertEqual(t.gettext('foo'), 'bar')
+
     def test_some_translations(self):
         eq = self.assertEqual
         # test some translations

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