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import unittest
from unittest import TestCase

from liminal.runners.airflow.tasks import job_start
from tests.util import dag_test_utils


# noinspection DuplicatedCode
class TestJobStartTask(TestCase):

    def test_apply_task_to_dag(self):
        dag = dag_test_utils.create_dag()

        task0 = job_start.JobStartTask(
            task_id="start_task",
            dag=dag,
            liminal_config={'metrics': {'namespace': 'StartJobNameSpace', 'backends': ['cloudwatch']}},
            pipeline_config={'pipeline': 'my_start_pipeline'},
            task_config={},
            parent=None,
            trigger_rule='all_success'
        )
        task0.apply_task_to_dag()

        self.assertEqual(len(dag.tasks), 1)
        dag_task0 = dag.tasks[0]

        self.assertEqual(dag_task0.namespace, 'StartJobNameSpace')
        self.assertEqual(dag_task0.backends, ['cloudwatch'])

        self.assertEqual(dag_task0.task_id, 'start')

    def test_apply_task_to_dag_missing_metrics(self):
        conf = {'pipeline': 'my_pipeline'}

        dag = dag_test_utils.create_dag()

        task0 = job_start.JobStartTask(
            task_id="start_task",
            dag=dag,
            liminal_config=conf,
            task_config={},
            pipeline_config={'pipeline': 'my_end_pipeline'},
            parent=None,
            trigger_rule='all_success')
        task0.apply_task_to_dag()

        self.assertEqual(len(dag.tasks), 1)
        dag_task0 = dag.tasks[0]

        self.assertEqual(dag_task0.namespace, '')
        self.assertEqual(dag_task0.backends, [])
        self.assertEqual(dag_task0.trigger_rule, 'all_success')

    def test_apply_task_to_dag_with_partial_configuration(self):
        dag = dag_test_utils.create_dag()

        task0 = job_start.JobStartTask(task_id="start_task",
                                       dag=dag,
                                       liminal_config={'metrics': {'namespace': 'StartJobNameSpace'}},
                                       pipeline_config={'pipeline': 'my_start_pipeline'},
                                       task_config={},
                                       parent=None,
                                       trigger_rule='all_success', )
        task0.apply_task_to_dag()

        self.assertEqual(len(dag.tasks), 1)
        dag_task0 = dag.tasks[0]

        self.assertEqual(dag_task0.namespace, 'StartJobNameSpace')
        self.assertEqual(dag_task0.backends, [])


if __name__ == '__main__':
    unittest.main()