Issue #22854: fileno() is always required in IOBase; remove test

Also change BufferedReader.writable() and BufferedWriter.readable() to always
return False.

diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 34760c9533ec7c3899c9a3fbbbbdf7a39876e35a..b7f6046038daff4db416c9eb7350acffc26bf83e 100644 (file)
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -693,12 +693,6 @@ class CommonBufferedTests:
 
         self.assertEqual(42, bufio.fileno())
 
-    @unittest.skip('test having existential crisis')
-    def test_no_fileno(self):
-        # XXX will we always have fileno() function? If so, kill
-        # this test. Else, write it.
-        pass
-
     def test_invalid_args(self):
         rawio = self.MockRawIO()
         bufio = self.tp(rawio)