Merged revisions 81459 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r81459 | victor.stinner | 2010-05-22 04:11:07 +0200 (sam., 22 mai 2010) | 3 lines
Issue #6268: Fix seek() method of codecs.open(), don't read the BOM twice
after seek(0)
........
diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py
index 7c3a30b..47b80f7 100644
--- a/Lib/test/test_codecs.py
+++ b/Lib/test/test_codecs.py
@@ -1488,6 +1488,26 @@
self.assertEquals(srw.read(), u"\xfc")
+class BomTest(unittest.TestCase):
+ def test_seek0(self):
+ data = "1234567890"
+ tests = ("utf-16",
+ "utf-16-le",
+ "utf-16-be",
+ "utf-32",
+ "utf-32-le",
+ "utf-32-be")
+ for encoding in tests:
+ with codecs.open('foo', 'wt+', encoding=encoding) as f:
+ # Check if the BOM is written only once
+ f.write(data)
+ f.write(data)
+ f.seek(0)
+ self.assertEquals(f.read(), data * 2)
+ f.seek(0)
+ self.assertEquals(f.read(), data * 2)
+
+
def test_main():
test_support.run_unittest(
UTF32Test,
@@ -1516,6 +1536,7 @@
BasicStrTest,
CharmapTest,
WithStmtTest,
+ BomTest,
)