Method test_getbuffer_gc_collect

Lib/test/test_io/test_memoryio.py:488–505

(self)

        memio.write(b'x')

    def test_getbuffer_gc_collect(self):
        memio = self.ioclass(b"1234567890")
        buf = memio.getbuffer()
        memiowr = weakref.ref(memio)
        bufwr = weakref.ref(buf)
        # Create a reference loop.
        a = [buf]
        a.append(a)
        # The Python implementation emits an unraisable exception.
        with support.catch_unraisable_exception():
            del memio
        del buf
        del a
        # The C implementation emits an unraisable exception.
        with support.catch_unraisable_exception():
            gc.collect()
        self.assertIsNone(memiowr())
        self.assertIsNone(bufwr())

    def test_read1(self):
        buf = self.buftype("1234567890")