Method test_line_buffering

Lib/test/test_io.py:2957–2966

(self)

        self.assertIn(TestSubclass.__name__, repr(f))

    def test_line_buffering(self):
        r = self.BytesIO()
        b = self.BufferedWriter(r, 1000)
        t = self.TextIOWrapper(b, encoding="utf-8", newline="\n", line_buffering=True)
        t.write("X")
        self.assertEqual(r.getvalue(), b"")  # No flush happened
        t.write("Y\nZ")
        self.assertEqual(r.getvalue(), b"XY\nZ")  # All got flushed
        t.write("A\rB")
        self.assertEqual(r.getvalue(), b"XY\nZA\rB")

    def test_reconfigure_line_buffering(self):
        r = self.BytesIO()