Issue #12175: RawIOBase.readall() now returns None if read() returns None.
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 9b18b70..d0608e3 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -798,14 +798,17 @@
# Inject some None's in there to simulate EWOULDBLOCK
rawio = self.MockRawIO((b"abc", b"d", None, b"efg", None, None, None))
bufio = self.tp(rawio)
-
self.assertEqual(b"abcd", bufio.read(6))
self.assertEqual(b"e", bufio.read(1))
self.assertEqual(b"fg", bufio.read())
self.assertEqual(b"", bufio.peek(1))
- self.assertTrue(None is bufio.read())
+ self.assertIsNone(bufio.read())
self.assertEqual(b"", bufio.read())
+ rawio = self.MockRawIO((b"a", None, None))
+ self.assertEqual(b"a", rawio.readall())
+ self.assertIsNone(rawio.readall())
+
def test_read_past_eof(self):
rawio = self.MockRawIO((b"abc", b"d", b"efg"))
bufio = self.tp(rawio)