"""
        Test `default_view` default value of DAG initialization
        """
        dag = models.DAG(dag_id="test-default_default_view")
        assert conf.get("webserver", "dag_default_view").lower() == dag.default_view
    def test_dag_invalid_orientation(self):
        """
        Test invalid `orientation` of DAG initialization
        """
        with pytest.raises(AirflowException, match="Invalid values of dag.orientation: only support"):
            models.DAG(dag_id="test-invalid-orientation", orientation="airflow")
    def test_dag_orientation_default_value(self):
        """
        Test `orientation` default value of DAG initialization
        """
        dag = models.DAG(dag_id="test-default_orientation")
        assert conf.get("webserver", "dag_orientation") == dag.orientation
    def test_dag_as_context_manager(self):
        """
        Test DAG as a context manager.
        When used as a context manager, Operators are automatically added to
        the DAG (unless they specify a different DAG)
        """
        dag = DAG("dag", start_date=DEFAULT_DATE, default_args={"owner": "owner1"})
        dag2 = DAG("dag2", start_date=DEFAULT_DATE, default_args={"owner": "owner2"})
        with dag:
            op1 = EmptyOperator(task_id="op1")
            op2 = EmptyOperator(task_id="op2", dag=dag2)