1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.providers.downloads;
18
19import android.util.Log;
20
21/**
22 * Helper for Mockito-based test cases.
23 */
24public final class MockitoHelper {
25    private static final String TAG = "MockitoHelper";
26
27    private ClassLoader mOriginalClassLoader;
28    private Thread mContextThread;
29
30    /**
31     * Creates a new helper, which in turn will set the context classloader so
32     * it can load Mockito resources.
33     *
34     * @param packageClass test case class
35     */
36    public void setUp(Class<?> packageClass) throws Exception {
37        // makes a copy of the context classloader
38        mContextThread = Thread.currentThread();
39        mOriginalClassLoader = mContextThread.getContextClassLoader();
40        ClassLoader newClassLoader = packageClass.getClassLoader();
41        Log.v(TAG, "Changing context classloader from " + mOriginalClassLoader
42                + " to " + newClassLoader);
43        mContextThread.setContextClassLoader(newClassLoader);
44    }
45
46    /**
47     * Restores the context classloader to the previous value.
48     */
49    public void tearDown() throws Exception {
50        Log.v(TAG, "Restoring context classloader to " + mOriginalClassLoader);
51        mContextThread.setContextClassLoader(mOriginalClassLoader);
52    }
53}
54