def test_loading_boostrapped_mrjob_library(self):
        # track the dir we're loading mrjob from rather than the full path
        # to deal with edge cases where we load from the .py file,
        # and the script loads from the .pyc compiled from that .py file.
        our_mrjob_dir = os.path.dirname(os.path.realpath(mrjob.__file__))

        with mrjob_conf_patcher():
            mr_job = MRJobWhereAreYou(['-r', 'local'])
            mr_job.sandbox()

            with mr_job.make_runner() as runner:
                # sanity check
                self.assertEqual(runner.get_opts()['bootstrap_mrjob'], True)
                local_tmp_dir = os.path.realpath(runner._get_local_tmp_dir())

                runner.run()

                output = list(runner.stream_output())
                self.assertEqual(len(output), 1)

                # script should load mrjob from its working dir
                _, script_mrjob_dir = mr_job.parse_output_line(output[0])

                self.assertNotEqual(our_mrjob_dir, script_mrjob_dir)
                assert script_mrjob_dir.startswith(local_tmp_dir)

    def test_can_turn_off_bootstrap_mrjob(self):
        # track the dir we're loading mrjob from rather than the full path
        # to deal with edge cases where we load from the .py file,
        # and the script loads from the .pyc compiled from that .py file.
        our_mrjob_dir = os.path.dirname(os.path.realpath(mrjob.__file__))

        self.mrjob_conf_path = os.path.join(self.tmp_dir, 'mrjob.conf')
        dump_mrjob_conf({'runners': {'local': {'bootstrap_mrjob': False}}},
                        open(self.mrjob_conf_path, 'w'))

        mr_job = MRJobWhereAreYou(['-c', self.mrjob_conf_path])
        mr_job.sandbox()

        with mr_job.make_runner() as runner:
            # sanity check
            self.assertEqual(runner.get_opts()['bootstrap_mrjob'], False)
            runner.run()

            output = list(runner.stream_output())

            self.assertEqual(len(output), 1)

            # script should load mrjob from the same place our test does
            _, script_mrjob_dir = mr_job.parse_output_line(output[0])
            self.assertEqual(our_mrjob_dir, script_mrjob_dir)

    def test_can_turn_off_bootstrap_mrjob(self):
        with mrjob_conf_patcher({"runners": {"local": {"bootstrap_mrjob": False}}}):

            mr_job = MRJobWhereAreYou(["-r", "local"])
            mr_job.sandbox()

            with mr_job.make_runner() as runner:
                # sanity check
                self.assertEqual(runner.get_opts()["bootstrap_mrjob"], False)
                local_tmp_dir = os.path.realpath(runner._get_local_tmp_dir())
                try:
                    with no_handlers_for_logger():
                        runner.run()
                except Exception as e:
                    # if mrjob is not installed, script won't be able to run
                    self.assertIn("ImportError", str(e))
                    return

                output = list(runner.stream_output())

                self.assertEqual(len(output), 1)

                # script should not load mrjob from local_tmp_dir
                _, script_mrjob_dir = mr_job.parse_output_line(output[0])
                self.assertFalse(script_mrjob_dir.startswith(local_tmp_dir))

    def test_can_turn_off_bootstrap_mrjob(self):
        with mrjob_conf_patcher(
                {'runners': {'local': {'bootstrap_mrjob': False}}}):

            mr_job = MRJobWhereAreYou(['-r', 'local'])
            mr_job.sandbox()

            with mr_job.make_runner() as runner:
                # sanity check
                self.assertEqual(runner._opts['bootstrap_mrjob'], False)
                local_tmp_dir = os.path.realpath(runner._get_local_tmp_dir())
                try:
                    runner.run()
                except StepFailedException:
                    # this is what happens when mrjob isn't installed elsewhere
                    return

                # however, if mrjob is installed, we need to verify that
                # we're using the installed version and not a bootstrapped copy
                output = list(mr_job.parse_output(runner.cat_output()))

                self.assertEqual(len(output), 1)

                # script should not load mrjob from local_tmp_dir
                _, script_mrjob_dir = output[0]
                self.assertFalse(script_mrjob_dir.startswith(local_tmp_dir))