Repository: apache/airflow
File: airflow-core/tests/unit/models/test_dagbag.py (Python)

Code before:
                import bundle_utils # typo

                with DAG('test_import'):
                    @task
                    def mytask():
                        print(util.get_message())
                    mytask()
                """
            )
        )
        syspath_before = deepcopy(sys.path)
        dagbag = DagBag(dag_folder=str(dag_file), bundle_path=tmp_path, include_examples=False)

        assert dagbag.import_errors  # Check import failed
        assert sys.path == syspath_before  # sys.path doesn't change

    def test_bundle_path_none_no_syspath_manipulation(self, tmp_path, caplog):
        """
        Test that no sys.path manipulation occurs when bundle_path is None.
        """
        dag_file = tmp_path / "simple_dag.py"
        dag_file.write_text(
            textwrap.dedent(
                """\
            from datetime import datetime
            from airflow.sdk import DAG, BaseOperator
            import sys

            dag = DAG("simple_dag", start_date=datetime(2021, 1, 1), schedule=None, description=f"DAG with sys.path: {sys.path}")
            t1 = BaseOperator(task_id="test_task", dag=dag)
                """
            )
        )
        syspath_before = deepcopy(sys.path)
        dagbag = DagBag(dag_folder=str(dag_file), bundle_path=None, include_examples=False)
        dag = dagbag.get_dag("simple_dag")

        assert str(tmp_path) not in dag.description  # path not updated during parse
        assert sys.path == syspath_before  # sys.path doesn't change


class TestCaptureWithReraise:
    @staticmethod
    def raise_warnings():
        warnings.warn("Foo", UserWarning, stacklevel=2)
        warnings.warn("Bar", UserWarning, stacklevel=2)
        warnings.warn("Baz", UserWarning, stacklevel=2)

    def test_capture_no_warnings(self):
        with warnings.catch_warnings():
            warnings.simplefilter("error")

Review comment (suggestion):
```suggestion
            from airflow.sdk import DAG
```

Code after:
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations

import pytest

pytestmark = pytest.mark.db_test

# This file previously contained tests for DagBag functionality, but those tests
# have been moved to airflow-core/tests/unit/dag_processing/test_dagbag.py to match
# the source code reorganization where DagBag moved from models to dag_processing.
#
# Tests for models-specific functionality (DBDagBag, DagPriorityParsingRequest, etc.)
# would remain in this file, but currently no such tests exist.