mirror of https://github.com/google/oss-fuzz.git
68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
# Copyright 2020 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Contains convenient helpers for writing tests."""
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import contextlib
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import os
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import shutil
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import tempfile
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from unittest import mock
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import config_utils
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def _create_config(config_cls, **kwargs):
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"""Creates a config object from |config_cls| and then sets every attribute
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that is a key in |kwargs| to the corresponding value. Asserts that each key in
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|kwargs| is an attribute of config."""
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with mock.patch('os.path.basename', return_value=None), mock.patch(
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'config_utils.get_project_src_path',
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return_value=None), mock.patch('config_utils._is_dry_run',
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return_value=True):
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config = config_cls()
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for key, value in kwargs.items():
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assert hasattr(config, key), 'Config doesn\'t have attribute: ' + key
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setattr(config, key, value)
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return config
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def create_build_config(**kwargs):
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"""Wrapper around _create_config for build configs."""
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return _create_config(config_utils.BuildFuzzersConfig, **kwargs)
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def create_run_config(**kwargs):
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"""Wrapper around _create_config for run configs."""
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return _create_config(config_utils.RunFuzzersConfig, **kwargs)
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def patch_environ(testcase_obj, env=None):
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"""Patch environment."""
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if env is None:
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env = {}
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patcher = mock.patch.dict(os.environ, env)
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testcase_obj.addCleanup(patcher.stop)
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patcher.start()
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@contextlib.contextmanager
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def temp_dir_copy(directory):
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"""Context manager that yields a temporary copy of |directory|."""
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with tempfile.TemporaryDirectory() as temp_dir:
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temp_copy_path = os.path.join(temp_dir, os.path.basename(directory))
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shutil.copytree(directory, temp_copy_path)
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yield temp_copy_path
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