tests/operators/test_email.py

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import datetime
import unittest
from unittest import mock

from airflow.models.dag import DAG
from airflow.operators.email import EmailOperator
from airflow.utils import timezone
from tests.test_utils.config import conf_vars

DEFAULT_DATE = timezone.datetime(2016, 1, 1)
END_DATE = timezone.datetime(2016, 1, 2)
INTERVAL = datetime.timedelta(hours=12)
FROZEN_NOW = timezone.datetime(2016, 1, 2, 12, 1, 1)

send_email_test = mock.Mock()


class TestEmailOperator(unittest.TestCase):
    def setUp(self):
        super().setUp()
        self.dag = DAG(
            'test_dag',
            default_args={'owner': 'airflow', 'start_date': DEFAULT_DATE},
            schedule_interval=INTERVAL,
        )
        self.addCleanup(self.dag.clear)

    def _run_as_operator(self, **kwargs):
        task = EmailOperator(
            to='airflow@example.com',
            subject='Test Run',
            html_content='The quick brown fox jumps over the lazy dog',
            task_id='task',
            dag=self.dag,
            files=["/tmp/Report-A-{{ execution_date.strftime('%Y-%m-%d') }}.csv"],
            **kwargs,
        )
        task.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE)

    def test_execute(self):
        with conf_vars({('email', 'email_backend'): 'tests.operators.test_email.send_email_test'}):
            self._run_as_operator()
        assert send_email_test.call_count == 1
        resulting_files = send_email_test.call_args[1]['files']  # pylint: disable=unsubscriptable-object
        assert resulting_files[0] == '/tmp/Report-A-2016-01-01.csv'