Issue #12050: zlib.decompressobj().decompress() now clears the unconsumed_tail
attribute when called without a max_length argument.
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index a003611..7f63143 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -310,6 +310,15 @@
self.assertRaises(ValueError, dco.decompress, "", -1)
self.assertEqual('', dco.unconsumed_tail)
+ def test_clear_unconsumed_tail(self):
+ # Issue #12050: calling decompress() without providing max_length
+ # should clear the unconsumed_tail attribute.
+ cdata = "x\x9cKLJ\x06\x00\x02M\x01" # "abc"
+ dco = zlib.decompressobj()
+ ddata = dco.decompress(cdata, 1)
+ ddata += dco.decompress(dco.unconsumed_tail)
+ self.assertEqual(dco.unconsumed_tail, "")
+
def test_flushes(self):
# Test flush() with the various options, using all the
# different levels in order to provide more variations.