tests/dags/test_invalid_param4.py

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# to you under the Apache License, Version 2.0 (the
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#
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from __future__ import annotations

from datetime import datetime

from airflow import DAG
from airflow.models.param import Param
from airflow.operators.python import PythonOperator

with DAG(
    "test_invalid_param4",
    start_date=datetime(2021, 1, 1),
    schedule="0 0 * * *",
    params={
        # a mandatory string but the default is not valid in length validation
        "str_param": Param(default="banana", type="string", minLength=2, maxLength=4),
    },
) as the_dag:

    def print_these(*params):
        for param in params:
            print(param)

    PythonOperator(
        task_id="ref_params",
        python_callable=print_these,
        op_args=[
            "{{ params.str_param }}",
        ],
    )