Class Stream

Lib/test/test_io.py:982–985

    def test_buffered_readinto_mixin(self):
        # Test the implementation provided by BufferedIOBase
        class Stream(self.BufferedIOBase):
            def read(self, size):
                return b"12345"
            read1 = read
        stream = Stream()
        for method in ("readinto", "readinto1"):
            with self.subTest(method):