Method test_file2file_not_supported

Lib/test/test_shutil.py:3373–3392

(self)

        return shutil._fastcopy_sendfile(fsrc, fdst)

    def test_file2file_not_supported(self):
        # Emulate a case where sendfile() only support file->socket
        # fds. In such a case copyfile() is supposed to skip the
        # fast-copy attempt from then on.
        assert shutil._USE_CP_SENDFILE
        try:
            with unittest.mock.patch(
                    self.PATCHPOINT,
                    side_effect=OSError(errno.ENOTSOCK, "yo")) as m:
                with self.get_files() as (src, dst):
                    with self.assertRaises(_GiveupOnFastCopy):
                        shutil._fastcopy_sendfile(src, dst)
                assert m.called
            assert not shutil._USE_CP_SENDFILE

            with unittest.mock.patch(self.PATCHPOINT) as m:
                shutil.copyfile(TESTFN, TESTFN2)
                assert not m.called
        finally:
            shutil._USE_CP_SENDFILE = True


@unittest.skipUnless(shutil._USE_CP_COPY_FILE_RANGE, "os.copy_file_range() not supported")