Issue #23796: peak and read1 methods of BufferedReader now raise ValueError
if they called on a closed object.
Patch by John Hergenroeder.
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 2fb1b1e..416c547 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -1115,6 +1115,14 @@
self.assertEqual(rawio._extraneous_reads, 0,
"failed for {}: {} != 0".format(n, rawio._extraneous_reads))
+ def test_read_on_closed(self):
+ # Issue #23796
+ b = io.BufferedReader(io.BytesIO(b"12"))
+ b.read(1)
+ b.close()
+ self.assertRaises(ValueError, b.peek)
+ self.assertRaises(ValueError, b.read1, 1)
+
class CBufferedReaderTest(BufferedReaderTest, SizeofTest):
tp = io.BufferedReader