1#!/usr/bin/env python
2#
3# Copyright 2017 - The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#     http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16"""Driver test library."""
17import unittest
18import mock
19
20
21class BaseDriverTest(unittest.TestCase):
22    """Base class for driver tests."""
23
24    def setUp(self):
25        """Set up test."""
26        self._patchers = []
27
28    def tearDown(self):
29        """Tear down test."""
30        for patcher in reversed(self._patchers):
31            patcher.stop()
32
33    def Patch(self, *args, **kwargs):
34        """A wrapper for mock.patch.object.
35
36        This wrapper starts a patcher and store it in self._patchers,
37        so that we can later stop them in tearDown.
38
39        Args:
40          *args: Arguments to pass to mock.patch.
41          **kwargs: Keyword arguments to pass to mock.patch.
42
43        Returns:
44          Mock object
45        """
46        patcher = mock.patch.object(*args, **kwargs)
47        self._patchers.append(patcher)
48        return patcher.start()
49