| /* |
| * Copyright (C) 2016 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 com.android.server.wifi; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| |
| import android.os.Binder; |
| import android.test.suitebuilder.annotation.SmallTest; |
| |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * Unit tests for {@link com.android.server.wifi.BinderUtil}. |
| */ |
| @SmallTest |
| public class BinderUtilTest { |
| static final int FAKE_UID = 30000000; |
| |
| private long mToken; |
| |
| /** |
| * Sets up the test harness before running a test. |
| */ |
| @Before |
| public void setUp() { |
| mToken = Binder.clearCallingIdentity(); |
| } |
| |
| /** |
| * Cleans up the test harness after running a test. |
| */ |
| @After |
| public void cleanUp() { |
| Binder.restoreCallingIdentity(mToken); |
| } |
| |
| /** |
| * Test using {@link BinderUtil.setUid} to set and restore the Binder uid. |
| */ |
| @Test |
| public void setUid() { |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| assertFalse(uid == FAKE_UID); |
| |
| // Verify that setUid() can be used to fake the Binder uid without affecting the pid. |
| BinderUtil.setUid(FAKE_UID); |
| assertEquals(pid, Binder.getCallingPid()); |
| assertEquals(FAKE_UID, Binder.getCallingUid()); |
| |
| // Verify that setUid() can be used to restore the original Binder uid without affecting the |
| // pid. |
| BinderUtil.setUid(uid); |
| assertEquals(pid, Binder.getCallingPid()); |
| assertEquals(uid, Binder.getCallingUid()); |
| } |
| |
| /** |
| * Test using {@link BinderUtil.setUid} to set the Binder uid and |
| * {@link Binder.restoreCallingIdentity} to restore it. |
| */ |
| @Test |
| public void setUidAndRestoreCallingIdentity() { |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| assertFalse(uid == FAKE_UID); |
| |
| // Verify that setUid() can be used to fake the Binder uid without affecting the pid. |
| BinderUtil.setUid(FAKE_UID); |
| assertEquals(pid, Binder.getCallingPid()); |
| assertEquals(FAKE_UID, Binder.getCallingUid()); |
| |
| // Verify that the setUid() calls above did not break Binder.restoreCallingIdentity(). |
| Binder.restoreCallingIdentity(mToken); |
| assertEquals(pid, Binder.getCallingPid()); |
| assertEquals(uid, Binder.getCallingUid()); |
| } |
| } |