tests/decorators/test_branch_python.py

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

import pytest

from airflow.decorators import task
from airflow.utils.state import State


class Test_BranchPythonDecoratedOperator:
    @pytest.mark.parametrize("branch_task_name", ["task_1", "task_2"])
    def test_branch_one(self, dag_maker, branch_task_name):
        @task
        def dummy_f():
            pass

        @task
        def task_1():
            pass

        @task
        def task_2():
            pass

        @task.branch(task_id="branching")
        def branch_operator():
            return branch_task_name

        with dag_maker():
            branchoperator = branch_operator()
            df = dummy_f()
            task_1 = task_1()
            task_2 = task_2()

            df.set_downstream(branchoperator)
            branchoperator.set_downstream(task_1)
            branchoperator.set_downstream(task_2)

        dr = dag_maker.create_dagrun()
        df.operator.run(start_date=dr.execution_date, end_date=dr.execution_date, ignore_ti_state=True)
        branchoperator.operator.run(
            start_date=dr.execution_date, end_date=dr.execution_date, ignore_ti_state=True
        )
        task_1.operator.run(start_date=dr.execution_date, end_date=dr.execution_date, ignore_ti_state=True)
        task_2.operator.run(start_date=dr.execution_date, end_date=dr.execution_date, ignore_ti_state=True)
        tis = dr.get_task_instances()

        for ti in tis:
            if ti.task_id == "dummy_f":
                assert ti.state == State.SUCCESS
            if ti.task_id == "branching":
                assert ti.state == State.SUCCESS

            if ti.task_id == "task_1" and branch_task_name == "task_1":
                assert ti.state == State.SUCCESS
            elif ti.task_id == "task_1":
                assert ti.state == State.SKIPPED

            if ti.task_id == "task_2" and branch_task_name == "task_2":
                assert ti.state == State.SUCCESS
            elif ti.task_id == "task_2":
                assert ti.state == State.SKIPPED