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      1 /*
      2  * Copyright (C) 2016 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 
     17 package com.android.phone;
     18 
     19 import android.content.Context;
     20 
     21 import com.android.services.telephony.Log;
     22 
     23 /**
     24  * Helper for Mockito-based test cases.
     25  */
     26 public final class MockitoHelper {
     27 
     28     private static final String TAG = "MockitoHelper";
     29     private static final String DEXCACHE = "dexmaker.dexcache";
     30 
     31     private ClassLoader mOriginalClassLoader;
     32     private Thread mContextThread;
     33 
     34     /**
     35      * Creates a new helper, which in turn will set the context classloader so it can load Mockito
     36      * resources.
     37      *
     38      * @param packageClass test case class
     39      */
     40     public void setUp(Context context, Class<?> packageClass) throws Exception {
     41         // makes a copy of the context classloader
     42         mContextThread = Thread.currentThread();
     43         mOriginalClassLoader = mContextThread.getContextClassLoader();
     44         ClassLoader newClassLoader = packageClass.getClassLoader();
     45         Log.v(TAG, "Changing context classloader from " + mOriginalClassLoader
     46                 + " to " + newClassLoader);
     47         mContextThread.setContextClassLoader(newClassLoader);
     48         String dexCache = context.getCacheDir().toString();
     49         Log.v(this, "Setting property %s to %s", DEXCACHE, dexCache);
     50         System.setProperty(DEXCACHE, dexCache);
     51     }
     52 
     53     /**
     54      * Restores the context classloader to the previous value.
     55      */
     56     public void tearDown() throws Exception {
     57         Log.v(TAG, "Restoring context classloader to " + mOriginalClassLoader);
     58         mContextThread.setContextClassLoader(mOriginalClassLoader);
     59         System.clearProperty(DEXCACHE);
     60     }
     61 }