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# Copyright 2018 Google LLC

#

# Licensed 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

#

# https://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 airflow import exceptions

from airflow import models

import internal_unit_testing

import pytest

@pytest.fixture(scope="function")

def set_variables(airflow_database):

models.Variable.set('gcp_project', 'example-project')

yield

models.Variable.delete('gcp_project')

def test_dag_no_dag():

import internal_unit_testing as module # Does not contain a DAG.

with pytest.raises(AssertionError):

internal_unit_testing.assert_has_valid_dag(module)

def test_dag_has_cycle():

from . import unit_testing_cycle as module

with pytest.raises(exceptions.AirflowDagCycleException):

internal_unit_testing.assert_has_valid_dag(module)

# [START composer_dag_unit_testing_test]

def test_dag_with_variables(set_variables):

# Importing the module verifies that there are no syntax errors.

from . import unit_testing_variables as module

# The assert_has_valid_dag verifies that the module contains an Airflow DAG

# and that the DAG contains no cycles.

internal_unit_testing.assert_has_valid_dag(module)

# [END composer_dag_unit_testing_test]