| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| package android.telephony; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotEquals; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertNull; |
| import static org.mockito.ArgumentMatchers.anyInt; |
| import static org.mockito.ArgumentMatchers.eq; |
| import static org.mockito.Mockito.verify; |
| import static org.mockito.Mockito.when; |
| |
| import android.os.IBinder; |
| import android.os.IInterface; |
| import android.test.suitebuilder.annotation.SmallTest; |
| |
| import androidx.test.runner.AndroidJUnit4; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.mockito.ArgumentCaptor; |
| import org.mockito.Mock; |
| import org.mockito.MockitoAnnotations; |
| |
| import java.util.concurrent.CountDownLatch; |
| |
| @RunWith(AndroidJUnit4.class) |
| public class BinderCacheManagerTest { |
| |
| @Mock IInterface mInterface; |
| @Mock IBinder mIBinder; |
| |
| private BinderCacheManager<IInterface> mBinderCache; |
| |
| @Before |
| public void setUp() throws Exception { |
| MockitoAnnotations.initMocks(this); |
| when(mInterface.asBinder()).thenReturn(mIBinder); |
| mBinderCache = new BinderCacheManager<>(() -> mInterface); |
| } |
| |
| @Test |
| @SmallTest |
| public void testGetConnection() { |
| when(mIBinder.isBinderAlive()).thenReturn(true); |
| assertEquals(mInterface, mBinderCache.getBinder()); |
| when(mIBinder.isBinderAlive()).thenReturn(false); |
| assertNull(mBinderCache.getBinder()); |
| } |
| |
| @Test |
| @SmallTest |
| public void testAddListenerAndDie() throws Exception { |
| IBinder.DeathRecipient recipient = populateCacheCaptureDeathRecipent(); |
| CountDownLatch l = new CountDownLatch(1); |
| assertEquals(mInterface, mBinderCache.listenOnBinder(l, l::countDown)); |
| when(mIBinder.isBinderAlive()).thenReturn(false); |
| recipient.binderDied(); |
| assertEquals(0, l.getCount()); |
| assertNull(mBinderCache.getBinder()); |
| // Listeners should not be abailable wile remote process is not available. |
| assertNull(mBinderCache.listenOnBinder(l, l::countDown)); |
| assertNull(mBinderCache.removeRunnable(l)); |
| verify(mIBinder).unlinkToDeath(eq(recipient), anyInt()); |
| } |
| |
| @Test |
| @SmallTest |
| public void testListenerNotCalledAfterRemoved() throws Exception { |
| IBinder.DeathRecipient recipient = populateCacheCaptureDeathRecipent(); |
| CountDownLatch l = new CountDownLatch(1); |
| assertEquals(mInterface, mBinderCache.listenOnBinder(l, l::countDown)); |
| assertEquals(mInterface, mBinderCache.removeRunnable(l)); |
| when(mIBinder.isBinderAlive()).thenReturn(false); |
| recipient.binderDied(); |
| // Callback should never have been called because the runnable was removed before it died. |
| assertNotEquals(0, l.getCount()); |
| } |
| |
| @Test |
| @SmallTest |
| public void testAddListenerAlreadyDead() throws Exception { |
| IBinder.DeathRecipient recipient = populateCacheCaptureDeathRecipent(); |
| when(mIBinder.isBinderAlive()).thenReturn(false); |
| recipient.binderDied(); |
| CountDownLatch l = new CountDownLatch(1); |
| assertNull(mBinderCache.listenOnBinder(l, l::countDown)); |
| assertNull(mBinderCache.removeRunnable(l)); |
| // Callback shouldn't be called if it was never added in the first place. |
| assertNotEquals(0, l.getCount()); |
| } |
| |
| /** |
| * Populate the cache with mInterface & capture the associated DeathRecipient |
| */ |
| private IBinder.DeathRecipient populateCacheCaptureDeathRecipent() throws Exception { |
| when(mIBinder.isBinderAlive()).thenReturn(true); |
| // Call getBinder() to populate cache the first time. |
| assertEquals(mInterface, mBinderCache.getBinder()); |
| ArgumentCaptor<IBinder.DeathRecipient> captor = ArgumentCaptor.forClass( |
| IBinder.DeathRecipient.class); |
| verify(mIBinder).linkToDeath(captor.capture(), anyInt()); |
| IBinder.DeathRecipient recipient = captor.getValue(); |
| assertNotNull(recipient); |
| return recipient; |
| } |
| } |