core/tests/coretests/src/com/android/internal/os/KernelWakelockReaderTest.java - platform/frameworks/base - Gitiles

 /*
  * 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.internal.os;

 import androidx.test.filters.SmallTest;

 import junit.framework.TestCase;

 import java.nio.charset.Charset;

 import android.system.suspend.WakeLockInfo;

 public class KernelWakelockReaderTest extends TestCase {
     /**
      * Helper class that builds the mock Kernel module file /d/wakeup_sources.
      */
     private static class ProcFileBuilder {
         private final static String sHeader = "name\t\tactive_count\tevent_count\twakeup_count\t" +
                 "expire_count\tactive_since\ttotal_time\tmax_time\tlast_change\t" +
                 "prevent_suspend_time\n";

         private StringBuilder mStringBuilder;

         private void ensureHeader() {
             if (mStringBuilder == null) {
                 mStringBuilder = new StringBuilder();
                 mStringBuilder.append(sHeader);
             }
         }

         public ProcFileBuilder addLine(String name, int count, long timeMillis) {
             ensureHeader();
             mStringBuilder.append(name).append("\t").append(count).append("\t0\t0\t0\t0\t")
                     .append(timeMillis).append("\t0\t0\t0\n");
             return this;
         }

         public byte[] getBytes() throws Exception {
             ensureHeader();
             byte[] data = mStringBuilder.toString().getBytes(Charset.forName("UTF-8"));

             // The Kernel puts a \0 at the end of the data. Since each of our lines ends with \n,
             // we override the last \n with a \0.
             data[data.length - 1] = 0;
             return data;
         }
     }

     /**
      * Helper method to create WakeLockInfo object.
      * @param totalTime is time in microseconds.
      * @return the created WakeLockInfo object.
      */
     private WakeLockInfo createWakeLockInfo(String name, int activeCount, long totalTime) {
         WakeLockInfo info = new WakeLockInfo();
         info.name = name;
         info.pid = 1;
         info.activeCount = activeCount;
         info.isActive = true;
         info.activeSince = 0;
         info.lastChange = 0;
         info.maxTime = 0;
         info.totalTime = totalTime;
         return info;
     }

     /**
      * Helper method for KernelWakeLockReader::readKernelWakelockStats(...)
      * @param staleStats existing stats to update.
      * @param buffer representation of mock kernel module file /d/wakeup_sources.
      * @param wlStats mock WakeLockInfo list returned from ISuspendControlService.
      * @return the updated stats.
      */
     private KernelWakelockStats readKernelWakelockStats(KernelWakelockStats staleStats,
                                                         byte[] buffer, WakeLockInfo[] wlStats) {
         mReader.updateVersion(staleStats);
         mReader.parseProcWakelocks(buffer, buffer.length, true, staleStats);
         mReader.getNativeWakelockStats(wlStats, staleStats);
         return mReader.removeOldStats(staleStats);
     }

     private KernelWakelockReader mReader;

     @Override
     public void setUp() throws Exception {
         super.setUp();
         mReader = new KernelWakelockReader();
     }

 // ------------------------- Kernel Wakelock Stats Test ------------------------
     @SmallTest
     public void testParseEmptyFile() throws Exception {
         KernelWakelockStats staleStats = mReader.parseProcWakelocks(new byte[0], 0, true,
                 new KernelWakelockStats());

         assertTrue(staleStats.isEmpty());
     }

     @SmallTest
     public void testOnlyHeader() throws Exception {
         byte[] buffer = new ProcFileBuilder().getBytes();

         KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
                 new KernelWakelockStats());

         assertTrue(staleStats.isEmpty());
     }

     @SmallTest
     public void testOneWakelock() throws Exception {
         byte[] buffer = new ProcFileBuilder()
                 .addLine("Wakelock", 34, 123) // Milliseconds
                 .getBytes();

         KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
                 new KernelWakelockStats());

         assertEquals(1, staleStats.size());

         assertTrue(staleStats.containsKey("Wakelock"));

         KernelWakelockStats.Entry entry = staleStats.get("Wakelock");
         assertEquals(34, entry.mCount);
         assertEquals(123 * 1000, entry.mTotalTime); // Microseconds
     }

     @SmallTest
     public void testTwoWakelocks() throws Exception {
         byte[] buffer = new ProcFileBuilder()
                 .addLine("Wakelock", 1, 10)
                 .addLine("Fakelock", 2, 20)
                 .getBytes();

         KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
                 new KernelWakelockStats());

         assertEquals(2, staleStats.size());

         assertTrue(staleStats.containsKey("Wakelock"));
         assertTrue(staleStats.containsKey("Fakelock"));
     }

     @SmallTest
     public void testDuplicateWakelocksAccumulate() throws Exception {
         byte[] buffer = new ProcFileBuilder()
                 .addLine("Wakelock", 1, 10) // Milliseconds
                 .addLine("Wakelock", 1, 10) // Milliseconds
                 .getBytes();

         KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
                 new KernelWakelockStats());

         assertEquals(1, staleStats.size());
         assertTrue(staleStats.containsKey("Wakelock"));

         KernelWakelockStats.Entry entry = staleStats.get("Wakelock");
         assertEquals(2, entry.mCount);
         assertEquals(20 * 1000, entry.mTotalTime); // Microseconds
     }

     @SmallTest
     public void testWakelocksBecomeStale() throws Exception {
         KernelWakelockStats staleStats = new KernelWakelockStats();

         byte[] buffer = new ProcFileBuilder()
                 .addLine("Fakelock", 3, 30)
                 .getBytes();

         readKernelWakelockStats(staleStats, buffer, new WakeLockInfo[0]);

         assertEquals(1, staleStats.size());
         assertTrue(staleStats.containsKey("Fakelock"));

         buffer = new ProcFileBuilder()
                 .addLine("Wakelock", 1, 10)
                 .getBytes();

         readKernelWakelockStats(staleStats, buffer, new WakeLockInfo[0]);

         assertEquals(1, staleStats.size());
         assertTrue(staleStats.containsKey("Wakelock"));
         assertFalse(staleStats.containsKey("Fakelock"));
     }

 // -------------------- Native (SystemSuspend) Wakelock Stats Test -------------------
     @SmallTest
     public void testEmptyWakeLockInfoList() {
         KernelWakelockStats staleStats = mReader.getNativeWakelockStats(new WakeLockInfo[0],
                 new KernelWakelockStats());

         assertTrue(staleStats.isEmpty());
     }

     @SmallTest
     public void testOneWakeLockInfo() {
         WakeLockInfo[] wlStats = new WakeLockInfo[1];
         wlStats[0] = createWakeLockInfo("WakeLock", 20, 10000);

         KernelWakelockStats staleStats = mReader.getNativeWakelockStats(wlStats,
                 new KernelWakelockStats());

         assertEquals(1, staleStats.size());

         assertTrue(staleStats.containsKey("WakeLock"));

         KernelWakelockStats.Entry entry = staleStats.get("WakeLock");
         assertEquals(20, entry.mCount);
         assertEquals(10000, entry.mTotalTime);
     }

     @SmallTest
     public void testTwoWakeLockInfos() {
         WakeLockInfo[] wlStats = new WakeLockInfo[2];
         wlStats[0] = createWakeLockInfo("WakeLock1", 10, 1000);
         wlStats[1] = createWakeLockInfo("WakeLock2", 20, 2000);

         KernelWakelockStats staleStats = mReader.getNativeWakelockStats(wlStats,
                 new KernelWakelockStats());

         assertEquals(2, staleStats.size());

         assertTrue(staleStats.containsKey("WakeLock1"));
         assertTrue(staleStats.containsKey("WakeLock2"));

         KernelWakelockStats.Entry entry1 = staleStats.get("WakeLock1");
         assertEquals(10, entry1.mCount);
         assertEquals(1000, entry1.mTotalTime);

         KernelWakelockStats.Entry entry2 = staleStats.get("WakeLock2");
         assertEquals(20, entry2.mCount);
         assertEquals(2000, entry2.mTotalTime);
     }

     @SmallTest
     public void testWakeLockInfosBecomeStale() {
         WakeLockInfo[] wlStats = new WakeLockInfo[1];
         wlStats[0] = createWakeLockInfo("WakeLock1", 10, 1000);

         KernelWakelockStats staleStats = new KernelWakelockStats();

         readKernelWakelockStats(staleStats, new byte[0], wlStats);

         assertEquals(1, staleStats.size());

         assertTrue(staleStats.containsKey("WakeLock1"));
         KernelWakelockStats.Entry entry = staleStats.get("WakeLock1");
         assertEquals(10, entry.mCount);
         assertEquals(1000, entry.mTotalTime);

         wlStats[0] = createWakeLockInfo("WakeLock2", 20, 2000);

         readKernelWakelockStats(staleStats, new byte[0], wlStats);

         assertEquals(1, staleStats.size());

         assertFalse(staleStats.containsKey("WakeLock1"));
         assertTrue(staleStats.containsKey("WakeLock2"));
         entry = staleStats.get("WakeLock2");
         assertEquals(20, entry.mCount);
         assertEquals(2000, entry.mTotalTime);
     }

 // -------------------- Aggregate  Wakelock Stats Tests --------------------
     @SmallTest
     public void testAggregateStatsEmpty() throws Exception {
         KernelWakelockStats staleStats = new KernelWakelockStats();

         byte[] buffer = new byte[0];
         WakeLockInfo[] wlStats = new WakeLockInfo[0];

         readKernelWakelockStats(staleStats, buffer, wlStats);

         assertTrue(staleStats.isEmpty());
     }

     @SmallTest
     public void testAggregateStatsNoNativeWakelocks() throws Exception {
         KernelWakelockStats staleStats = new KernelWakelockStats();

         byte[] buffer = new ProcFileBuilder()
                 .addLine("Wakelock", 34, 123) // Milliseconds
                 .getBytes();
         WakeLockInfo[] wlStats = new WakeLockInfo[0];

         readKernelWakelockStats(staleStats, buffer, wlStats);

         assertEquals(1, staleStats.size());

         assertTrue(staleStats.containsKey("Wakelock"));

         KernelWakelockStats.Entry entry = staleStats.get("Wakelock");
         assertEquals(34, entry.mCount);
         assertEquals(1000 * 123, entry.mTotalTime);  // Microseconds
     }

     @SmallTest
     public void testAggregateStatsNoKernelWakelocks() throws Exception {
         KernelWakelockStats staleStats = new KernelWakelockStats();

         byte[] buffer = new byte[0];
         WakeLockInfo[] wlStats = new WakeLockInfo[1];
         wlStats[0] = createWakeLockInfo("WakeLock", 10, 1000);

         readKernelWakelockStats(staleStats, buffer, wlStats);

         assertEquals(1, staleStats.size());

         assertTrue(staleStats.containsKey("WakeLock"));

         KernelWakelockStats.Entry entry = staleStats.get("WakeLock");
         assertEquals(10, entry.mCount);
         assertEquals(1000, entry.mTotalTime);
     }

     @SmallTest
     public void testAggregateStatsBothKernelAndNativeWakelocks() throws Exception {
         KernelWakelockStats staleStats = new KernelWakelockStats();

         byte[] buffer = new ProcFileBuilder()
                 .addLine("WakeLock1", 34, 123)  // Milliseconds
                 .getBytes();
         WakeLockInfo[] wlStats = new WakeLockInfo[1];
         wlStats[0] = createWakeLockInfo("WakeLock2", 10, 1000);

         readKernelWakelockStats(staleStats, buffer, wlStats);

         assertEquals(2, staleStats.size());

         assertTrue(staleStats.containsKey("WakeLock1"));
         KernelWakelockStats.Entry entry1 = staleStats.get("WakeLock1");
         assertEquals(34, entry1.mCount);
         assertEquals(123 * 1000, entry1.mTotalTime);  // Microseconds

         assertTrue(staleStats.containsKey("WakeLock2"));
         KernelWakelockStats.Entry entry2 = staleStats.get("WakeLock2");
         assertEquals(10, entry2.mCount);
         assertEquals(1000, entry2.mTotalTime);
     }

     @SmallTest
     public void testAggregateStatsUpdate() throws Exception {
         KernelWakelockStats staleStats = new KernelWakelockStats();

         byte[] buffer = new ProcFileBuilder()
                 .addLine("WakeLock1", 34, 123)  // Milliseconds
                 .addLine("WakeLock2", 46, 345)  // Milliseconds
                 .getBytes();
         WakeLockInfo[] wlStats = new WakeLockInfo[2];
         wlStats[0] = createWakeLockInfo("WakeLock3", 10, 1000);
         wlStats[1] = createWakeLockInfo("WakeLock4", 20, 2000);

         readKernelWakelockStats(staleStats, buffer, wlStats);

         assertEquals(4, staleStats.size());

         assertTrue(staleStats.containsKey("WakeLock1"));
         assertTrue(staleStats.containsKey("WakeLock2"));
         assertTrue(staleStats.containsKey("WakeLock3"));
         assertTrue(staleStats.containsKey("WakeLock4"));

         KernelWakelockStats.Entry entry1 = staleStats.get("WakeLock1");
         assertEquals(34, entry1.mCount);
         assertEquals(123 * 1000, entry1.mTotalTime); // Microseconds

         KernelWakelockStats.Entry entry2 = staleStats.get("WakeLock2");
         assertEquals(46, entry2.mCount);
         assertEquals(345 * 1000, entry2.mTotalTime); // Microseconds

         KernelWakelockStats.Entry entry3 = staleStats.get("WakeLock3");
         assertEquals(10, entry3.mCount);
         assertEquals(1000, entry3.mTotalTime);

         KernelWakelockStats.Entry entry4 = staleStats.get("WakeLock4");
         assertEquals(20, entry4.mCount);
         assertEquals(2000, entry4.mTotalTime);

         buffer = new ProcFileBuilder()
                 .addLine("WakeLock1", 45, 789)  // Milliseconds
                 .addLine("WakeLock1", 56, 123)  // Milliseconds
                 .getBytes();
         wlStats = new WakeLockInfo[1];
         wlStats[0] = createWakeLockInfo("WakeLock4", 40, 4000);

         readKernelWakelockStats(staleStats, buffer, wlStats);

         assertEquals(2, staleStats.size());

         assertTrue(staleStats.containsKey("WakeLock1"));
         assertTrue(staleStats.containsKey("WakeLock4"));

         assertFalse(staleStats.containsKey("WakeLock2"));
         assertFalse(staleStats.containsKey("WakeLock3"));

         entry1 = staleStats.get("WakeLock1");
         assertEquals(45 + 56, entry1.mCount);
         assertEquals((789 + 123) * 1000, entry1.mTotalTime);  // Microseconds

         entry2 = staleStats.get("WakeLock4");
         assertEquals(40, entry2.mCount);
         assertEquals(4000, entry4.mTotalTime);
     }
 }
	/*
	* 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.internal.os;

	import androidx.test.filters.SmallTest;

	import junit.framework.TestCase;

	import java.nio.charset.Charset;

	import android.system.suspend.WakeLockInfo;

	public class KernelWakelockReaderTest extends TestCase {
	/**
	* Helper class that builds the mock Kernel module file /d/wakeup_sources.
	*/
	private static class ProcFileBuilder {
	private final static String sHeader = "name\t\tactive_count\tevent_count\twakeup_count\t" +
	"expire_count\tactive_since\ttotal_time\tmax_time\tlast_change\t" +
	"prevent_suspend_time\n";

	private StringBuilder mStringBuilder;

	private void ensureHeader() {
	if (mStringBuilder == null) {
	mStringBuilder = new StringBuilder();
	mStringBuilder.append(sHeader);
	}
	}

	public ProcFileBuilder addLine(String name, int count, long timeMillis) {
	ensureHeader();
	mStringBuilder.append(name).append("\t").append(count).append("\t0\t0\t0\t0\t")
	.append(timeMillis).append("\t0\t0\t0\n");
	return this;
	}

	public byte[] getBytes() throws Exception {
	ensureHeader();
	byte[] data = mStringBuilder.toString().getBytes(Charset.forName("UTF-8"));

	// The Kernel puts a \0 at the end of the data. Since each of our lines ends with \n,
	// we override the last \n with a \0.
	data[data.length - 1] = 0;
	return data;
	}
	}

	/**
	* Helper method to create WakeLockInfo object.
	* @param totalTime is time in microseconds.
	* @return the created WakeLockInfo object.
	*/
	private WakeLockInfo createWakeLockInfo(String name, int activeCount, long totalTime) {
	WakeLockInfo info = new WakeLockInfo();
	info.name = name;
	info.pid = 1;
	info.activeCount = activeCount;
	info.isActive = true;
	info.activeSince = 0;
	info.lastChange = 0;
	info.maxTime = 0;
	info.totalTime = totalTime;
	return info;
	}

	/**
	* Helper method for KernelWakeLockReader::readKernelWakelockStats(...)
	* @param staleStats existing stats to update.
	* @param buffer representation of mock kernel module file /d/wakeup_sources.
	* @param wlStats mock WakeLockInfo list returned from ISuspendControlService.
	* @return the updated stats.
	*/
	private KernelWakelockStats readKernelWakelockStats(KernelWakelockStats staleStats,
	byte[] buffer, WakeLockInfo[] wlStats) {
	mReader.updateVersion(staleStats);
	mReader.parseProcWakelocks(buffer, buffer.length, true, staleStats);
	mReader.getNativeWakelockStats(wlStats, staleStats);
	return mReader.removeOldStats(staleStats);
	}

	private KernelWakelockReader mReader;

	@Override
	public void setUp() throws Exception {
	super.setUp();
	mReader = new KernelWakelockReader();
	}

	// ------------------------- Kernel Wakelock Stats Test ------------------------
	@SmallTest
	public void testParseEmptyFile() throws Exception {
	KernelWakelockStats staleStats = mReader.parseProcWakelocks(new byte[0], 0, true,
	new KernelWakelockStats());

	assertTrue(staleStats.isEmpty());
	}

	@SmallTest
	public void testOnlyHeader() throws Exception {
	byte[] buffer = new ProcFileBuilder().getBytes();

	KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
	new KernelWakelockStats());

	assertTrue(staleStats.isEmpty());
	}

	@SmallTest
	public void testOneWakelock() throws Exception {
	byte[] buffer = new ProcFileBuilder()
	.addLine("Wakelock", 34, 123) // Milliseconds
	.getBytes();

	KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
	new KernelWakelockStats());

	assertEquals(1, staleStats.size());

	assertTrue(staleStats.containsKey("Wakelock"));

	KernelWakelockStats.Entry entry = staleStats.get("Wakelock");
	assertEquals(34, entry.mCount);
	assertEquals(123 * 1000, entry.mTotalTime); // Microseconds
	}

	@SmallTest
	public void testTwoWakelocks() throws Exception {
	byte[] buffer = new ProcFileBuilder()
	.addLine("Wakelock", 1, 10)
	.addLine("Fakelock", 2, 20)
	.getBytes();

	KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
	new KernelWakelockStats());

	assertEquals(2, staleStats.size());

	assertTrue(staleStats.containsKey("Wakelock"));
	assertTrue(staleStats.containsKey("Fakelock"));
	}

	@SmallTest
	public void testDuplicateWakelocksAccumulate() throws Exception {
	byte[] buffer = new ProcFileBuilder()
	.addLine("Wakelock", 1, 10) // Milliseconds
	.addLine("Wakelock", 1, 10) // Milliseconds
	.getBytes();

	KernelWakelockStats staleStats = mReader.parseProcWakelocks(buffer, buffer.length, true,
	new KernelWakelockStats());

	assertEquals(1, staleStats.size());
	assertTrue(staleStats.containsKey("Wakelock"));

	KernelWakelockStats.Entry entry = staleStats.get("Wakelock");
	assertEquals(2, entry.mCount);
	assertEquals(20 * 1000, entry.mTotalTime); // Microseconds
	}

	@SmallTest
	public void testWakelocksBecomeStale() throws Exception {
	KernelWakelockStats staleStats = new KernelWakelockStats();

	byte[] buffer = new ProcFileBuilder()
	.addLine("Fakelock", 3, 30)
	.getBytes();

	readKernelWakelockStats(staleStats, buffer, new WakeLockInfo[0]);

	assertEquals(1, staleStats.size());
	assertTrue(staleStats.containsKey("Fakelock"));

	buffer = new ProcFileBuilder()
	.addLine("Wakelock", 1, 10)
	.getBytes();

	readKernelWakelockStats(staleStats, buffer, new WakeLockInfo[0]);

	assertEquals(1, staleStats.size());
	assertTrue(staleStats.containsKey("Wakelock"));
	assertFalse(staleStats.containsKey("Fakelock"));
	}

	// -------------------- Native (SystemSuspend) Wakelock Stats Test -------------------
	@SmallTest
	public void testEmptyWakeLockInfoList() {
	KernelWakelockStats staleStats = mReader.getNativeWakelockStats(new WakeLockInfo[0],
	new KernelWakelockStats());

	assertTrue(staleStats.isEmpty());
	}

	@SmallTest
	public void testOneWakeLockInfo() {
	WakeLockInfo[] wlStats = new WakeLockInfo[1];
	wlStats[0] = createWakeLockInfo("WakeLock", 20, 10000);

	KernelWakelockStats staleStats = mReader.getNativeWakelockStats(wlStats,
	new KernelWakelockStats());

	assertEquals(1, staleStats.size());

	assertTrue(staleStats.containsKey("WakeLock"));

	KernelWakelockStats.Entry entry = staleStats.get("WakeLock");
	assertEquals(20, entry.mCount);
	assertEquals(10000, entry.mTotalTime);
	}

	@SmallTest
	public void testTwoWakeLockInfos() {
	WakeLockInfo[] wlStats = new WakeLockInfo[2];
	wlStats[0] = createWakeLockInfo("WakeLock1", 10, 1000);
	wlStats[1] = createWakeLockInfo("WakeLock2", 20, 2000);

	KernelWakelockStats staleStats = mReader.getNativeWakelockStats(wlStats,
	new KernelWakelockStats());

	assertEquals(2, staleStats.size());

	assertTrue(staleStats.containsKey("WakeLock1"));
	assertTrue(staleStats.containsKey("WakeLock2"));

	KernelWakelockStats.Entry entry1 = staleStats.get("WakeLock1");
	assertEquals(10, entry1.mCount);
	assertEquals(1000, entry1.mTotalTime);

	KernelWakelockStats.Entry entry2 = staleStats.get("WakeLock2");
	assertEquals(20, entry2.mCount);
	assertEquals(2000, entry2.mTotalTime);
	}

	@SmallTest
	public void testWakeLockInfosBecomeStale() {
	WakeLockInfo[] wlStats = new WakeLockInfo[1];
	wlStats[0] = createWakeLockInfo("WakeLock1", 10, 1000);

	KernelWakelockStats staleStats = new KernelWakelockStats();

	readKernelWakelockStats(staleStats, new byte[0], wlStats);

	assertEquals(1, staleStats.size());

	assertTrue(staleStats.containsKey("WakeLock1"));
	KernelWakelockStats.Entry entry = staleStats.get("WakeLock1");
	assertEquals(10, entry.mCount);
	assertEquals(1000, entry.mTotalTime);

	wlStats[0] = createWakeLockInfo("WakeLock2", 20, 2000);

	readKernelWakelockStats(staleStats, new byte[0], wlStats);

	assertEquals(1, staleStats.size());

	assertFalse(staleStats.containsKey("WakeLock1"));
	assertTrue(staleStats.containsKey("WakeLock2"));
	entry = staleStats.get("WakeLock2");
	assertEquals(20, entry.mCount);
	assertEquals(2000, entry.mTotalTime);
	}

	// -------------------- Aggregate Wakelock Stats Tests --------------------
	@SmallTest
	public void testAggregateStatsEmpty() throws Exception {
	KernelWakelockStats staleStats = new KernelWakelockStats();

	byte[] buffer = new byte[0];
	WakeLockInfo[] wlStats = new WakeLockInfo[0];

	readKernelWakelockStats(staleStats, buffer, wlStats);

	assertTrue(staleStats.isEmpty());
	}

	@SmallTest
	public void testAggregateStatsNoNativeWakelocks() throws Exception {
	KernelWakelockStats staleStats = new KernelWakelockStats();

	byte[] buffer = new ProcFileBuilder()
	.addLine("Wakelock", 34, 123) // Milliseconds
	.getBytes();
	WakeLockInfo[] wlStats = new WakeLockInfo[0];

	readKernelWakelockStats(staleStats, buffer, wlStats);

	assertEquals(1, staleStats.size());

	assertTrue(staleStats.containsKey("Wakelock"));

	KernelWakelockStats.Entry entry = staleStats.get("Wakelock");
	assertEquals(34, entry.mCount);
	assertEquals(1000 * 123, entry.mTotalTime); // Microseconds
	}

	@SmallTest
	public void testAggregateStatsNoKernelWakelocks() throws Exception {
	KernelWakelockStats staleStats = new KernelWakelockStats();

	byte[] buffer = new byte[0];
	WakeLockInfo[] wlStats = new WakeLockInfo[1];
	wlStats[0] = createWakeLockInfo("WakeLock", 10, 1000);

	readKernelWakelockStats(staleStats, buffer, wlStats);

	assertEquals(1, staleStats.size());

	assertTrue(staleStats.containsKey("WakeLock"));

	KernelWakelockStats.Entry entry = staleStats.get("WakeLock");
	assertEquals(10, entry.mCount);
	assertEquals(1000, entry.mTotalTime);
	}

	@SmallTest
	public void testAggregateStatsBothKernelAndNativeWakelocks() throws Exception {
	KernelWakelockStats staleStats = new KernelWakelockStats();

	byte[] buffer = new ProcFileBuilder()
	.addLine("WakeLock1", 34, 123) // Milliseconds
	.getBytes();
	WakeLockInfo[] wlStats = new WakeLockInfo[1];
	wlStats[0] = createWakeLockInfo("WakeLock2", 10, 1000);

	readKernelWakelockStats(staleStats, buffer, wlStats);

	assertEquals(2, staleStats.size());

	assertTrue(staleStats.containsKey("WakeLock1"));
	KernelWakelockStats.Entry entry1 = staleStats.get("WakeLock1");
	assertEquals(34, entry1.mCount);
	assertEquals(123 * 1000, entry1.mTotalTime); // Microseconds

	assertTrue(staleStats.containsKey("WakeLock2"));
	KernelWakelockStats.Entry entry2 = staleStats.get("WakeLock2");
	assertEquals(10, entry2.mCount);
	assertEquals(1000, entry2.mTotalTime);
	}

	@SmallTest
	public void testAggregateStatsUpdate() throws Exception {
	KernelWakelockStats staleStats = new KernelWakelockStats();

	byte[] buffer = new ProcFileBuilder()
	.addLine("WakeLock1", 34, 123) // Milliseconds
	.addLine("WakeLock2", 46, 345) // Milliseconds
	.getBytes();
	WakeLockInfo[] wlStats = new WakeLockInfo[2];
	wlStats[0] = createWakeLockInfo("WakeLock3", 10, 1000);
	wlStats[1] = createWakeLockInfo("WakeLock4", 20, 2000);

	readKernelWakelockStats(staleStats, buffer, wlStats);

	assertEquals(4, staleStats.size());

	assertTrue(staleStats.containsKey("WakeLock1"));
	assertTrue(staleStats.containsKey("WakeLock2"));
	assertTrue(staleStats.containsKey("WakeLock3"));
	assertTrue(staleStats.containsKey("WakeLock4"));

	KernelWakelockStats.Entry entry1 = staleStats.get("WakeLock1");
	assertEquals(34, entry1.mCount);
	assertEquals(123 * 1000, entry1.mTotalTime); // Microseconds

	KernelWakelockStats.Entry entry2 = staleStats.get("WakeLock2");
	assertEquals(46, entry2.mCount);
	assertEquals(345 * 1000, entry2.mTotalTime); // Microseconds

	KernelWakelockStats.Entry entry3 = staleStats.get("WakeLock3");
	assertEquals(10, entry3.mCount);
	assertEquals(1000, entry3.mTotalTime);

	KernelWakelockStats.Entry entry4 = staleStats.get("WakeLock4");
	assertEquals(20, entry4.mCount);
	assertEquals(2000, entry4.mTotalTime);

	buffer = new ProcFileBuilder()
	.addLine("WakeLock1", 45, 789) // Milliseconds
	.addLine("WakeLock1", 56, 123) // Milliseconds
	.getBytes();
	wlStats = new WakeLockInfo[1];
	wlStats[0] = createWakeLockInfo("WakeLock4", 40, 4000);

	readKernelWakelockStats(staleStats, buffer, wlStats);

	assertEquals(2, staleStats.size());

	assertTrue(staleStats.containsKey("WakeLock1"));
	assertTrue(staleStats.containsKey("WakeLock4"));

	assertFalse(staleStats.containsKey("WakeLock2"));
	assertFalse(staleStats.containsKey("WakeLock3"));

	entry1 = staleStats.get("WakeLock1");
	assertEquals(45 + 56, entry1.mCount);
	assertEquals((789 + 123) * 1000, entry1.mTotalTime); // Microseconds

	entry2 = staleStats.get("WakeLock4");
	assertEquals(40, entry2.mCount);
	assertEquals(4000, entry4.mTotalTime);
	}
	}