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# Copyright 2020 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
#
# 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.
"""Contains convenient helpers for writing tests."""
import contextlib
import os
import shutil
import tempfile
from unittest import mock
import config_utils
import docker
def _create_config(config_cls, **kwargs):
"""Creates a config object from |config_cls| and then sets every attribute
that is a key in |kwargs| to the corresponding value. Asserts that each key in
|kwargs| is an attribute of config."""
with mock.patch('os.path.basename', return_value=None), mock.patch(
'config_utils.get_project_src_path',
return_value=None), mock.patch('config_utils._is_dry_run',
return_value=True):
config = config_cls()
for key, value in kwargs.items():
assert hasattr(config, key), 'Config doesn\'t have attribute: ' + key
setattr(config, key, value)
return config
def create_build_config(**kwargs):
"""Wrapper around _create_config for build configs."""
return _create_config(config_utils.BuildFuzzersConfig, **kwargs)
def create_run_config(**kwargs):
"""Wrapper around _create_config for run configs."""
return _create_config(config_utils.RunFuzzersConfig, **kwargs)
def create_workspace(workspace_path='/workspace'):
"""Returns a workspace located at |workspace_path| ('/workspace' by
default)."""
config = create_run_config(workspace=workspace_path)
return docker.Workspace(config)
def patch_environ(testcase_obj, env=None):
"""Patch environment."""
if env is None:
env = {}
patcher = mock.patch.dict(os.environ, env)
testcase_obj.addCleanup(patcher.stop)
patcher.start()
@contextlib.contextmanager
def temp_dir_copy(directory):
"""Context manager that yields a temporary copy of |directory|."""
with tempfile.TemporaryDirectory() as temp_dir:
temp_copy_path = os.path.join(temp_dir, os.path.basename(directory))
shutil.copytree(directory, temp_copy_path)
yield temp_copy_path
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