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/*
* Copyright (C) 2011 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.net;
import static android.net.NetworkStatsHistory.FIELD_ALL;
import static android.net.NetworkStatsHistory.FIELD_OPERATIONS;
import static android.net.NetworkStatsHistory.FIELD_RX_BYTES;
import static android.net.NetworkStatsHistory.FIELD_RX_PACKETS;
import static android.net.NetworkStatsHistory.FIELD_TX_BYTES;
import static android.net.NetworkStatsHistory.DataStreamUtils.readVarLong;
import static android.net.NetworkStatsHistory.DataStreamUtils.writeVarLong;
import static android.net.NetworkStatsHistory.Entry.UNKNOWN;
import static android.text.format.DateUtils.DAY_IN_MILLIS;
import static android.text.format.DateUtils.HOUR_IN_MILLIS;
import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
import static android.text.format.DateUtils.SECOND_IN_MILLIS;
import static android.text.format.DateUtils.WEEK_IN_MILLIS;
import static android.text.format.DateUtils.YEAR_IN_MILLIS;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;
import android.test.suitebuilder.annotation.Suppress;
import android.util.Log;
import com.android.frameworks.coretests.R;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.util.Random;
@SmallTest
public class NetworkStatsHistoryTest extends AndroidTestCase {
private static final String TAG = "NetworkStatsHistoryTest";
private static final long TEST_START = 1194220800000L;
private static final long KB_IN_BYTES = 1024;
private static final long MB_IN_BYTES = KB_IN_BYTES * 1024;
private static final long GB_IN_BYTES = MB_IN_BYTES * 1024;
private NetworkStatsHistory stats;
@Override
protected void tearDown() throws Exception {
super.tearDown();
if (stats != null) {
assertConsistent(stats);
}
}
public void testReadOriginalVersion() throws Exception {
final DataInputStream in = new DataInputStream(
getContext().getResources().openRawResource(R.raw.history_v1));
NetworkStatsHistory.Entry entry = null;
try {
final NetworkStatsHistory history = new NetworkStatsHistory(in);
assertEquals(15 * SECOND_IN_MILLIS, history.getBucketDuration());
entry = history.getValues(0, entry);
assertEquals(29143L, entry.rxBytes);
assertEquals(6223L, entry.txBytes);
entry = history.getValues(history.size() - 1, entry);
assertEquals(1476L, entry.rxBytes);
assertEquals(838L, entry.txBytes);
entry = history.getValues(Long.MIN_VALUE, Long.MAX_VALUE, entry);
assertEquals(332401L, entry.rxBytes);
assertEquals(64314L, entry.txBytes);
} finally {
in.close();
}
}
public void testRecordSingleBucket() throws Exception {
final long BUCKET_SIZE = HOUR_IN_MILLIS;
stats = new NetworkStatsHistory(BUCKET_SIZE);
// record data into narrow window to get single bucket
stats.recordData(TEST_START, TEST_START + SECOND_IN_MILLIS,
new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 2L));
assertEquals(1, stats.size());
assertValues(stats, 0, SECOND_IN_MILLIS, 1024L, 10L, 2048L, 20L, 2L);
}
public void testRecordEqualBuckets() throws Exception {
final long bucketDuration = HOUR_IN_MILLIS;
stats = new NetworkStatsHistory(bucketDuration);
// split equally across two buckets
final long recordStart = TEST_START + (bucketDuration / 2);
stats.recordData(recordStart, recordStart + bucketDuration,
new NetworkStats.Entry(1024L, 10L, 128L, 2L, 2L));
assertEquals(2, stats.size());
assertValues(stats, 0, HOUR_IN_MILLIS / 2, 512L, 5L, 64L, 1L, 1L);
assertValues(stats, 1, HOUR_IN_MILLIS / 2, 512L, 5L, 64L, 1L, 1L);
}
public void testRecordTouchingBuckets() throws Exception {
final long BUCKET_SIZE = 15 * MINUTE_IN_MILLIS;
stats = new NetworkStatsHistory(BUCKET_SIZE);
// split almost completely into middle bucket, but with a few minutes
// overlap into neighboring buckets. total record is 20 minutes.
final long recordStart = (TEST_START + BUCKET_SIZE) - MINUTE_IN_MILLIS;
final long recordEnd = (TEST_START + (BUCKET_SIZE * 2)) + (MINUTE_IN_MILLIS * 4);
stats.recordData(recordStart, recordEnd,
new NetworkStats.Entry(1000L, 2000L, 5000L, 10000L, 100L));
assertEquals(3, stats.size());
// first bucket should have (1/20 of value)
assertValues(stats, 0, MINUTE_IN_MILLIS, 50L, 100L, 250L, 500L, 5L);
// second bucket should have (15/20 of value)
assertValues(stats, 1, 15 * MINUTE_IN_MILLIS, 750L, 1500L, 3750L, 7500L, 75L);
// final bucket should have (4/20 of value)
assertValues(stats, 2, 4 * MINUTE_IN_MILLIS, 200L, 400L, 1000L, 2000L, 20L);
}
public void testRecordGapBuckets() throws Exception {
final long BUCKET_SIZE = HOUR_IN_MILLIS;
stats = new NetworkStatsHistory(BUCKET_SIZE);
// record some data today and next week with large gap
final long firstStart = TEST_START;
final long lastStart = TEST_START + WEEK_IN_MILLIS;
stats.recordData(firstStart, firstStart + SECOND_IN_MILLIS,
new NetworkStats.Entry(128L, 2L, 256L, 4L, 1L));
stats.recordData(lastStart, lastStart + SECOND_IN_MILLIS,
new NetworkStats.Entry(64L, 1L, 512L, 8L, 2L));
// we should have two buckets, far apart from each other
assertEquals(2, stats.size());
assertValues(stats, 0, SECOND_IN_MILLIS, 128L, 2L, 256L, 4L, 1L);
assertValues(stats, 1, SECOND_IN_MILLIS, 64L, 1L, 512L, 8L, 2L);
// now record something in middle, spread across two buckets
final long middleStart = TEST_START + DAY_IN_MILLIS;
final long middleEnd = middleStart + (HOUR_IN_MILLIS * 2);
stats.recordData(middleStart, middleEnd,
new NetworkStats.Entry(2048L, 4L, 2048L, 4L, 2L));
// now should have four buckets, with new record in middle two buckets
assertEquals(4, stats.size());
assertValues(stats, 0, SECOND_IN_MILLIS, 128L, 2L, 256L, 4L, 1L);
assertValues(stats, 1, HOUR_IN_MILLIS, 1024L, 2L, 1024L, 2L, 1L);
assertValues(stats, 2, HOUR_IN_MILLIS, 1024L, 2L, 1024L, 2L, 1L);
assertValues(stats, 3, SECOND_IN_MILLIS, 64L, 1L, 512L, 8L, 2L);
}
public void testRecordOverlapBuckets() throws Exception {
final long BUCKET_SIZE = HOUR_IN_MILLIS;
stats = new NetworkStatsHistory(BUCKET_SIZE);
// record some data in one bucket, and another overlapping buckets
stats.recordData(TEST_START, TEST_START + SECOND_IN_MILLIS,
new NetworkStats.Entry(256L, 2L, 256L, 2L, 1L));
final long midStart = TEST_START + (HOUR_IN_MILLIS / 2);
stats.recordData(midStart, midStart + HOUR_IN_MILLIS,
new NetworkStats.Entry(1024L, 10L, 1024L, 10L, 10L));
// should have two buckets, with some data mixed together
assertEquals(2, stats.size());
assertValues(stats, 0, SECOND_IN_MILLIS + (HOUR_IN_MILLIS / 2), 768L, 7L, 768L, 7L, 6L);
assertValues(stats, 1, (HOUR_IN_MILLIS / 2), 512L, 5L, 512L, 5L, 5L);
}
public void testRecordEntireGapIdentical() throws Exception {
// first, create two separate histories far apart
final NetworkStatsHistory stats1 = new NetworkStatsHistory(HOUR_IN_MILLIS);
stats1.recordData(TEST_START, TEST_START + 2 * HOUR_IN_MILLIS, 2000L, 1000L);
final long TEST_START_2 = TEST_START + DAY_IN_MILLIS;
final NetworkStatsHistory stats2 = new NetworkStatsHistory(HOUR_IN_MILLIS);
stats2.recordData(TEST_START_2, TEST_START_2 + 2 * HOUR_IN_MILLIS, 1000L, 500L);
// combine together with identical bucket size
stats = new NetworkStatsHistory(HOUR_IN_MILLIS);
stats.recordEntireHistory(stats1);
stats.recordEntireHistory(stats2);
// first verify that totals match up
assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 3000L, 1500L);
// now inspect internal buckets
assertValues(stats, 0, 1000L, 500L);
assertValues(stats, 1, 1000L, 500L);
assertValues(stats, 2, 500L, 250L);
assertValues(stats, 3, 500L, 250L);
}
public void testRecordEntireOverlapVaryingBuckets() throws Exception {
// create history just over hour bucket boundary
final NetworkStatsHistory stats1 = new NetworkStatsHistory(HOUR_IN_MILLIS);
stats1.recordData(TEST_START, TEST_START + MINUTE_IN_MILLIS * 60, 600L, 600L);
final long TEST_START_2 = TEST_START + MINUTE_IN_MILLIS;
final NetworkStatsHistory stats2 = new NetworkStatsHistory(MINUTE_IN_MILLIS);
stats2.recordData(TEST_START_2, TEST_START_2 + MINUTE_IN_MILLIS * 5, 50L, 50L);
// combine together with minute bucket size
stats = new NetworkStatsHistory(MINUTE_IN_MILLIS);
stats.recordEntireHistory(stats1);
stats.recordEntireHistory(stats2);
// first verify that totals match up
assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 650L, 650L);
// now inspect internal buckets
assertValues(stats, 0, 10L, 10L);
assertValues(stats, 1, 20L, 20L);
assertValues(stats, 2, 20L, 20L);
assertValues(stats, 3, 20L, 20L);
assertValues(stats, 4, 20L, 20L);
assertValues(stats, 5, 20L, 20L);
assertValues(stats, 6, 10L, 10L);
// now combine using 15min buckets
stats = new NetworkStatsHistory(HOUR_IN_MILLIS / 4);
stats.recordEntireHistory(stats1);
stats.recordEntireHistory(stats2);
// first verify that totals match up
assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 650L, 650L);
// and inspect buckets
assertValues(stats, 0, 200L, 200L);
assertValues(stats, 1, 150L, 150L);
assertValues(stats, 2, 150L, 150L);
assertValues(stats, 3, 150L, 150L);
}
public void testRemove() throws Exception {
stats = new NetworkStatsHistory(HOUR_IN_MILLIS);
// record some data across 24 buckets
stats.recordData(TEST_START, TEST_START + DAY_IN_MILLIS, 24L, 24L);
assertEquals(24, stats.size());
// try removing far before buckets; should be no change
stats.removeBucketsBefore(TEST_START - YEAR_IN_MILLIS);
assertEquals(24, stats.size());
// try removing just moments into first bucket; should be no change
// since that bucket contains data beyond the cutoff
stats.removeBucketsBefore(TEST_START + SECOND_IN_MILLIS);
assertEquals(24, stats.size());
// try removing single bucket
stats.removeBucketsBefore(TEST_START + HOUR_IN_MILLIS);
assertEquals(23, stats.size());
// try removing multiple buckets
stats.removeBucketsBefore(TEST_START + (4 * HOUR_IN_MILLIS));
assertEquals(20, stats.size());
// try removing all buckets
stats.removeBucketsBefore(TEST_START + YEAR_IN_MILLIS);
assertEquals(0, stats.size());
}
public void testTotalData() throws Exception {
final long BUCKET_SIZE = HOUR_IN_MILLIS;
stats = new NetworkStatsHistory(BUCKET_SIZE);
// record uniform data across day
stats.recordData(TEST_START, TEST_START + DAY_IN_MILLIS, 2400L, 4800L);
// verify that total outside range is 0
assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START - DAY_IN_MILLIS, 0L, 0L);
// verify total in first hour
assertValues(stats, TEST_START, TEST_START + HOUR_IN_MILLIS, 100L, 200L);
// verify total across 1.5 hours
assertValues(stats, TEST_START, TEST_START + (long) (1.5 * HOUR_IN_MILLIS), 150L, 300L);
// verify total beyond end
assertValues(stats, TEST_START + (23 * HOUR_IN_MILLIS), TEST_START + WEEK_IN_MILLIS, 100L, 200L);
// verify everything total
assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 2400L, 4800L);
}
@Suppress
public void testFuzzing() throws Exception {
try {
// fuzzing with random events, looking for crashes
final NetworkStats.Entry entry = new NetworkStats.Entry();
final Random r = new Random();
for (int i = 0; i < 500; i++) {
stats = new NetworkStatsHistory(r.nextLong());
for (int j = 0; j < 10000; j++) {
if (r.nextBoolean()) {
// add range
final long start = r.nextLong();
final long end = start + r.nextInt();
entry.rxBytes = nextPositiveLong(r);
entry.rxPackets = nextPositiveLong(r);
entry.txBytes = nextPositiveLong(r);
entry.txPackets = nextPositiveLong(r);
entry.operations = nextPositiveLong(r);
stats.recordData(start, end, entry);
} else {
// trim something
stats.removeBucketsBefore(r.nextLong());
}
}
assertConsistent(stats);
}
} catch (Throwable e) {
Log.e(TAG, String.valueOf(stats));
throw new RuntimeException(e);
}
}
private static long nextPositiveLong(Random r) {
final long value = r.nextLong();
return value < 0 ? -value : value;
}
public void testIgnoreFields() throws Exception {
final NetworkStatsHistory history = new NetworkStatsHistory(
MINUTE_IN_MILLIS, 0, FIELD_RX_BYTES | FIELD_TX_BYTES);
history.recordData(0, MINUTE_IN_MILLIS,
new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
history.recordData(0, 2 * MINUTE_IN_MILLIS,
new NetworkStats.Entry(2L, 2L, 2L, 2L, 2L));
assertFullValues(history, UNKNOWN, 1026L, UNKNOWN, 2050L, UNKNOWN, UNKNOWN);
}
public void testIgnoreFieldsRecordIn() throws Exception {
final NetworkStatsHistory full = new NetworkStatsHistory(MINUTE_IN_MILLIS, 0, FIELD_ALL);
final NetworkStatsHistory partial = new NetworkStatsHistory(
MINUTE_IN_MILLIS, 0, FIELD_RX_PACKETS | FIELD_OPERATIONS);
full.recordData(0, MINUTE_IN_MILLIS,
new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
partial.recordEntireHistory(full);
assertFullValues(partial, UNKNOWN, UNKNOWN, 10L, UNKNOWN, UNKNOWN, 4L);
}
public void testIgnoreFieldsRecordOut() throws Exception {
final NetworkStatsHistory full = new NetworkStatsHistory(MINUTE_IN_MILLIS, 0, FIELD_ALL);
final NetworkStatsHistory partial = new NetworkStatsHistory(
MINUTE_IN_MILLIS, 0, FIELD_RX_PACKETS | FIELD_OPERATIONS);
partial.recordData(0, MINUTE_IN_MILLIS,
new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
full.recordEntireHistory(partial);
assertFullValues(full, MINUTE_IN_MILLIS, 0L, 10L, 0L, 0L, 4L);
}
public void testSerialize() throws Exception {
final NetworkStatsHistory before = new NetworkStatsHistory(MINUTE_IN_MILLIS, 40, FIELD_ALL);
before.recordData(0, 4 * MINUTE_IN_MILLIS,
new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
before.recordData(DAY_IN_MILLIS, DAY_IN_MILLIS + MINUTE_IN_MILLIS,
new NetworkStats.Entry(10L, 20L, 30L, 40L, 50L));
final ByteArrayOutputStream out = new ByteArrayOutputStream();
before.writeToStream(new DataOutputStream(out));
out.close();
final ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
final NetworkStatsHistory after = new NetworkStatsHistory(new DataInputStream(in));
// must have identical totals before and after
assertFullValues(before, 5 * MINUTE_IN_MILLIS, 1034L, 30L, 2078L, 60L, 54L);
assertFullValues(after, 5 * MINUTE_IN_MILLIS, 1034L, 30L, 2078L, 60L, 54L);
}
public void testVarLong() throws Exception {
assertEquals(0L, performVarLong(0L));
assertEquals(-1L, performVarLong(-1L));
assertEquals(1024L, performVarLong(1024L));
assertEquals(-1024L, performVarLong(-1024L));
assertEquals(40 * MB_IN_BYTES, performVarLong(40 * MB_IN_BYTES));
assertEquals(512 * GB_IN_BYTES, performVarLong(512 * GB_IN_BYTES));
assertEquals(Long.MIN_VALUE, performVarLong(Long.MIN_VALUE));
assertEquals(Long.MAX_VALUE, performVarLong(Long.MAX_VALUE));
assertEquals(Long.MIN_VALUE + 40, performVarLong(Long.MIN_VALUE + 40));
assertEquals(Long.MAX_VALUE - 40, performVarLong(Long.MAX_VALUE - 40));
}
private static long performVarLong(long before) throws Exception {
final ByteArrayOutputStream out = new ByteArrayOutputStream();
writeVarLong(new DataOutputStream(out), before);
final ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
return readVarLong(new DataInputStream(in));
}
private static void assertConsistent(NetworkStatsHistory stats) {
// verify timestamps are monotonic
long lastStart = Long.MIN_VALUE;
NetworkStatsHistory.Entry entry = null;
for (int i = 0; i < stats.size(); i++) {
entry = stats.getValues(i, entry);
assertTrue(lastStart < entry.bucketStart);
lastStart = entry.bucketStart;
}
}
private static void assertValues(
NetworkStatsHistory stats, int index, long rxBytes, long txBytes) {
final NetworkStatsHistory.Entry entry = stats.getValues(index, null);
assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
assertEquals("unexpected txBytes", txBytes, entry.txBytes);
}
private static void assertValues(
NetworkStatsHistory stats, long start, long end, long rxBytes, long txBytes) {
final NetworkStatsHistory.Entry entry = stats.getValues(start, end, null);
assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
assertEquals("unexpected txBytes", txBytes, entry.txBytes);
}
private static void assertValues(NetworkStatsHistory stats, int index, long activeTime,
long rxBytes, long rxPackets, long txBytes, long txPackets, long operations) {
final NetworkStatsHistory.Entry entry = stats.getValues(index, null);
assertEquals("unexpected activeTime", activeTime, entry.activeTime);
assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
assertEquals("unexpected txBytes", txBytes, entry.txBytes);
assertEquals("unexpected txPackets", txPackets, entry.txPackets);
assertEquals("unexpected operations", operations, entry.operations);
}
private static void assertFullValues(NetworkStatsHistory stats, long activeTime, long rxBytes,
long rxPackets, long txBytes, long txPackets, long operations) {
assertValues(stats, Long.MIN_VALUE, Long.MAX_VALUE, activeTime, rxBytes, rxPackets, txBytes,
txPackets, operations);
}
private static void assertValues(NetworkStatsHistory stats, long start, long end,
long activeTime, long rxBytes, long rxPackets, long txBytes, long txPackets,
long operations) {
final NetworkStatsHistory.Entry entry = stats.getValues(start, end, null);
assertEquals("unexpected activeTime", activeTime, entry.activeTime);
assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
assertEquals("unexpected txBytes", txBytes, entry.txBytes);
assertEquals("unexpected txPackets", txPackets, entry.txPackets);
assertEquals("unexpected operations", operations, entry.operations);
}
}
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