tests/test_utils/mock_operators.py

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#
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import warnings
from typing import Sequence

import attr

from airflow.models.baseoperator import BaseOperator, BaseOperatorLink
from airflow.models.xcom import XCom
from airflow.utils.context import Context


class MockOperator(BaseOperator):
    """Operator for testing purposes."""

    template_fields: Sequence[str] = ("arg1", "arg2")

    def __init__(self, arg1: str = "", arg2: str = "", **kwargs):
        super().__init__(**kwargs)
        self.arg1 = arg1
        self.arg2 = arg2

    def execute(self, context: Context):
        pass


class AirflowLink(BaseOperatorLink):
    """
    Operator Link for Apache Airflow Website
    """

    name = 'airflow'

    def get_link(self, operator, *, ti_key):
        return 'https://airflow.apache.org'


class Dummy2TestOperator(BaseOperator):
    """
    Example of an Operator that has an extra operator link
    and will be overridden by the one defined in tests/plugins/test_plugin.py
    """

    operator_extra_links = (AirflowLink(),)


class Dummy3TestOperator(BaseOperator):
    """
    Example of an operator that has no extra Operator link.
    An operator link would be added to this operator via Airflow plugin
    """

    operator_extra_links = ()


@attr.s(auto_attribs=True)
class CustomBaseIndexOpLink(BaseOperatorLink):
    index: int = attr.ib()

    @property
    def name(self) -> str:
        return f'BigQuery Console #{self.index + 1}'

    def get_link(self, operator, *, ti_key):
        search_queries = XCom.get_one(
            task_id=ti_key.task_id, dag_id=ti_key.dag_id, run_id=ti_key.run_id, key='search_query'
        )
        if not search_queries:
            return None
        if len(search_queries) < self.index:
            return None
        search_query = search_queries[self.index]
        return f'https://console.cloud.google.com/bigquery?j={search_query}'


class CustomOpLink(BaseOperatorLink):
    name = 'Google Custom'

    def get_link(self, operator, *, ti_key):
        search_query = XCom.get_one(
            task_id=ti_key.task_id, dag_id=ti_key.dag_id, run_id=ti_key.run_id, key='search_query'
        )
        return f'http://google.com/custom_base_link?search={search_query}'


class CustomOperator(BaseOperator):

    template_fields = ['bash_command']

    @property
    def operator_extra_links(self):
        """
        Return operator extra links
        """
        if isinstance(self.bash_command, str) or self.bash_command is None:
            return (CustomOpLink(),)
        return (CustomBaseIndexOpLink(i) for i, _ in enumerate(self.bash_command))

    def __init__(self, bash_command=None, **kwargs):
        super().__init__(**kwargs)
        self.bash_command = bash_command

    def execute(self, context: Context):
        self.log.info("Hello World!")
        context['task_instance'].xcom_push(key='search_query', value="dummy_value")


class GoogleLink(BaseOperatorLink):
    """
    Operator Link for Apache Airflow Website for Google
    """

    name = 'google'
    operators = [Dummy3TestOperator, CustomOperator]

    def get_link(self, operator, *, ti_key):
        return 'https://www.google.com'


class AirflowLink2(BaseOperatorLink):
    """
    Operator Link for Apache Airflow Website for 1.10.5
    """

    name = 'airflow'
    operators = [Dummy2TestOperator, Dummy3TestOperator]

    def get_link(self, operator, *, ti_key):
        return 'https://airflow.apache.org/1.10.5/'


class GithubLink(BaseOperatorLink):
    """
    Operator Link for Apache Airflow GitHub
    """

    name = 'github'

    def get_link(self, operator, *, ti_key):
        return 'https://github.com/apache/airflow'


class DeprecatedOperator(BaseOperator):
    def __init__(self, **kwargs):
        warnings.warn("This operator is deprecated.", DeprecationWarning, stacklevel=2)
        super().__init__(**kwargs)

    def execute(self, context: Context):
        pass