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**Description**

Related to the discussion here: https://github.com/apache/airflow/pull/8553#discussion_r416136954

Allow user to define expected terminal state. e.g. `JOB_STATE_CANCELLED` could be not treated as failure but expected terminal state.


<!-- A short description of your feature -->


expected_variables["jobName"] = job_name
        start_java_mock.assert_called_once_with(
            variables=expected_variables,
            jar=LOCAL_JAR_FILE,
            job_class=JOB_CLASS,
            process_line_callback=mock.ANY,
        )
        dataflow_hook_mock.return_value.wait_for_done.assert_called_once_with(
            job_id=mock.ANY,
            job_name=job_name,
            location=TEST_LOCATION,
            multiple_jobs=False,
        )
class TestDataflowTemplatedJobStartOperator:
    @pytest.fixture
    def sync_operator(self):
        return DataflowTemplatedJobStartOperator(
            project_id=TEST_PROJECT,
            task_id=TASK_ID,
            template=TEMPLATE,
            job_name=JOB_NAME,
            parameters=PARAMETERS,
            options=DEFAULT_OPTIONS_TEMPLATE,
            dataflow_default_options={"EXTRA_OPTION": "TEST_A"},
            poll_sleep=POLL_SLEEP,
            location=TEST_LOCATION,
            environment={"maxWorkers": 2},
        )
    @pytest.fixture
    def deferrable_operator(self):