Method test_exception_on_first_call

Lib/test/test_shutil.py:3251–3259

(self)

                              shutil.copyfile, TESTFN, TESTFN2)

    def test_exception_on_first_call(self):
        # Emulate a case where the first call to the zero-copy
        # function raises an exception in which case the function is
        # supposed to give up immediately.
        with unittest.mock.patch(self.PATCHPOINT,
                                 side_effect=OSError(errno.EINVAL, "yo")):
            with self.get_files() as (src, dst):
                with self.assertRaises(_GiveupOnFastCopy):
                    self.zerocopy_fun(src, dst)

    def test_filesystem_full(self):
        # Emulate a case where filesystem is full and sendfile() fails