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Commit 30317dd2 authored by TreeHugger Robot's avatar TreeHugger Robot Committed by Android (Google) Code Review
Browse files

Merge "Query usage event for a longer time period and then trim the usage... 

Merge "Query usage event for a longer time period and then trim the usage events outside the expected period to make sure the app usage calculation near the boundaries are correct."
parents eac5326a 4a6b2655

src/com/android/settings/fuelgauge/batteryusage/DataProcessManager.java

+1 −1
Original line number Diff line number Diff line
@@ -376,7 +376,7 @@ public class DataProcessManager { 
        // Generates the indexed AppUsagePeriod list data for each corresponding time slot for

        // further use.

        mAppUsagePeriodMap = DataProcessor.generateAppUsagePeriodMap(

                mHourlyBatteryLevelsPerDay, mAppUsageEventList, mStartTimestampOfLevelData);

                mHourlyBatteryLevelsPerDay, mAppUsageEventList);

    }



    private void tryToGenerateFinalDataAndApplyCallback() {

src/com/android/settings/fuelgauge/batteryusage/DataProcessor.java

+74 −65
Original line number Diff line number Diff line
@@ -72,7 +72,6 @@ import java.util.stream.Stream; 
 * usage UI.

 */

public final class DataProcessor {

    private static final boolean DEBUG = false;

    private static final String TAG = "DataProcessor";

    private static final int POWER_COMPONENT_SYSTEM_SERVICES = 7;

    private static final int POWER_COMPONENT_WAKELOCK = 12;
@@ -98,6 +97,9 @@ public final class DataProcessor { 
    @VisibleForTesting

    static long sFakeCurrentTimeMillis = 0;



    @VisibleForTesting

    static boolean sDebug = false;



    @VisibleForTesting

    static IUsageStatsManager sUsageStatsManager =

            IUsageStatsManager.Stub.asInterface(
@@ -250,8 +252,7 @@ public final class DataProcessor { 
    public static Map<Integer, Map<Integer, Map<Long, Map<String, List<AppUsagePeriod>>>>>

            generateAppUsagePeriodMap(

            final List<BatteryLevelData.PeriodBatteryLevelData> hourlyBatteryLevelsPerDay,

            final List<AppUsageEvent> appUsageEventList,

            final long startTimestampOfLevelData) {

            final List<AppUsageEvent> appUsageEventList) {

        if (appUsageEventList.isEmpty()) {

            Log.w(TAG, "appUsageEventList is empty");

            return null;
@@ -261,12 +262,8 @@ public final class DataProcessor { 
        Collections.sort(appUsageEventList, TIMESTAMP_COMPARATOR);

        final Map<Integer, Map<Integer, Map<Long, Map<String, List<AppUsagePeriod>>>>> resultMap =

                new HashMap<>();

        // Starts from the first index within expected time range. The events before the time range

        // will be bypassed directly.

        int currentAppUsageEventIndex =

                getFirstUsageEventIndex(appUsageEventList, startTimestampOfLevelData);

        final int appUsageEventSize = appUsageEventList.size();



        final long dailySize = hourlyBatteryLevelsPerDay.size();

        for (int dailyIndex = 0; dailyIndex < hourlyBatteryLevelsPerDay.size(); dailyIndex++) {

            final Map<Integer, Map<Long, Map<String, List<AppUsagePeriod>>>> dailyMap =

                    new HashMap<>();
@@ -275,32 +272,21 @@ public final class DataProcessor { 
                continue;

            }

            final List<Long> timestamps = hourlyBatteryLevelsPerDay.get(dailyIndex).getTimestamps();

            final long hourlySize = timestamps.size() - 1;

            for (int hourlyIndex = 0; hourlyIndex < timestamps.size() - 1; hourlyIndex++) {

                // The start and end timestamps of this slot should be the adjacent timestamps.

                final long startTimestamp = timestamps.get(hourlyIndex);

                final long endTimestamp = timestamps.get(hourlyIndex + 1);

                // The final slot is to show the data from last even hour until now but the

                // timestamp in hourlyBatteryLevelsPerDay is not the real value. So use current

                // timestamp instead of reading the timestamp from hourlyBatteryLevelsPerDay here.

                final long endTimestamp =

                        dailyIndex == dailySize - 1 && hourlyIndex == hourlySize - 1 && !sDebug

                                ? System.currentTimeMillis() : timestamps.get(hourlyIndex + 1);



                // Gets the app usage event list for this hourly slot first.

                final List<AppUsageEvent> hourlyAppUsageEventList = new ArrayList<>();

                while (currentAppUsageEventIndex < appUsageEventSize) {

                    // If current event is null, go for next directly.

                    if (appUsageEventList.get(currentAppUsageEventIndex) == null) {

                        currentAppUsageEventIndex++;

                        continue;

                    }

                    final long timestamp =

                            appUsageEventList.get(currentAppUsageEventIndex).getTimestamp();

                    // If the timestamp is already later than the end time, stop the loop.

                    if (timestamp >= endTimestamp) {

                        break;

                    }

                    // If timestamp is within the time range, add it into the list.

                    if (timestamp >= startTimestamp) {

                        hourlyAppUsageEventList.add(

                                appUsageEventList.get(currentAppUsageEventIndex));

                    }

                    currentAppUsageEventIndex++;

                }

                final List<AppUsageEvent> hourlyAppUsageEventList =

                        getAppUsageEventListWithinTimeRangeWithBuffer(

                                appUsageEventList, startTimestamp, endTimestamp);



                // The value could be null when there is no data in the hourly slot.

                dailyMap.put(
@@ -785,13 +771,11 @@ public final class DataProcessor { 
            final List<AppUsageEvent> usageEvents, final long startTime, final long endTime) {

        final List<AppUsagePeriod> usagePeriodList = new ArrayList<>();

        AppUsagePeriod.Builder pendingUsagePeriod = AppUsagePeriod.newBuilder();

        boolean hasMetStartEvent = false;



        for (final AppUsageEvent event : usageEvents) {

            final long eventTime = event.getTimestamp();



            if (event.getType() == AppUsageEventType.ACTIVITY_RESUMED) {

                hasMetStartEvent = true;

                // If there is an existing start time, simply ignore this start event.

                // If there was no start time, then start a new period.

                if (!pendingUsagePeriod.hasStartTime()) {
@@ -800,37 +784,31 @@ public final class DataProcessor { 
            } else if (event.getType() == AppUsageEventType.ACTIVITY_STOPPED) {

                pendingUsagePeriod.setEndTime(eventTime);

                if (!pendingUsagePeriod.hasStartTime()) {

                    // If we haven't met start event in this list, the start event might happen

                    // in the previous time slot. use the startTime for this period.

                    // Otherwise, add one for the default duration.

                    if (!hasMetStartEvent) {

                        hasMetStartEvent = true;

                        pendingUsagePeriod.setStartTime(startTime);

                    } else {

                    pendingUsagePeriod.setStartTime(

                            getStartTimeForIncompleteUsagePeriod(pendingUsagePeriod));

                }

                }

                // If we already have start time, add it directly.

                addToPeriodList(usagePeriodList, pendingUsagePeriod.build());

                validateAndAddToPeriodList(

                        usagePeriodList, pendingUsagePeriod.build(), startTime, endTime);

                pendingUsagePeriod.clear();

            } else if (event.getType() == AppUsageEventType.DEVICE_SHUTDOWN) {

                hasMetStartEvent = true;

                // The end event might be lost when device is shutdown. Use the estimated end

                // time for the period.

                if (pendingUsagePeriod.hasStartTime()) {

                    pendingUsagePeriod.setEndTime(

                            getEndTimeForIncompleteUsagePeriod(pendingUsagePeriod, eventTime));

                    addToPeriodList(usagePeriodList, pendingUsagePeriod.build());

                    validateAndAddToPeriodList(

                            usagePeriodList, pendingUsagePeriod.build(), startTime, endTime);

                    pendingUsagePeriod.clear();

                }

            }

        }

        // If there exists unclosed period, the stop event might happen in the next time

        // slot. Use the endTime for the period.

        if (pendingUsagePeriod.hasStartTime()) {

        if (pendingUsagePeriod.hasStartTime() && pendingUsagePeriod.getStartTime() < endTime) {

            pendingUsagePeriod.setEndTime(endTime);

            addToPeriodList(usagePeriodList, pendingUsagePeriod.build());

            validateAndAddToPeriodList(

                    usagePeriodList, pendingUsagePeriod.build(), startTime, endTime);

            pendingUsagePeriod.clear();

        }

        return usagePeriodList;
@@ -881,12 +859,56 @@ public final class DataProcessor { 
        }

    }



    private static void addToPeriodList(

            final List<AppUsagePeriod> appUsagePeriodList, final AppUsagePeriod appUsagePeriod) {

    /**

     * Generates the list of {@link AppUsageEvent} within the specific time range.

     * The buffer is added to make sure the app usage calculation near the boundaries is correct.

     *

     * Note: The appUsageEventList should have been sorted when calling this function.

     */

    private static List<AppUsageEvent> getAppUsageEventListWithinTimeRangeWithBuffer(

            final List<AppUsageEvent> appUsageEventList, final long startTime, final long endTime) {

        final long start = startTime - DatabaseUtils.USAGE_QUERY_BUFFER_HOURS;

        final long end = endTime + DatabaseUtils.USAGE_QUERY_BUFFER_HOURS;

        final List<AppUsageEvent> resultList = new ArrayList<>();

        for (final AppUsageEvent event : appUsageEventList) {

            final long eventTime = event.getTimestamp();

            // Because the appUsageEventList has been sorted, if any event is already after the end

            // time, all the following events should be able to drop directly.

            if (eventTime > end) {

                break;

            }

            // If the event timestamp is in [start, end], add it into the result list.

            if (eventTime >= start) {

                resultList.add(event);

            }

        }

        return resultList;

    }



    private static void validateAndAddToPeriodList(

            final List<AppUsagePeriod> appUsagePeriodList,

            final AppUsagePeriod appUsagePeriod,

            final long startTime,

            final long endTime) {

        final long periodStartTime =

                trimPeriodTime(appUsagePeriod.getStartTime(), startTime, endTime);

        final long periodEndTime = trimPeriodTime(appUsagePeriod.getEndTime(), startTime, endTime);

        // Only when the period is valid, add it into the list.

        if (appUsagePeriod.getStartTime() < appUsagePeriod.getEndTime()) {

            appUsagePeriodList.add(appUsagePeriod);

        if (periodStartTime < periodEndTime) {

            final AppUsagePeriod period =

                    AppUsagePeriod.newBuilder()

                            .setStartTime(periodStartTime)

                            .setEndTime(periodEndTime)

                            .build();

            appUsagePeriodList.add(period);

        }

    }



    private static long trimPeriodTime(

            final long originalTime, final long startTime, final long endTime) {

        long finalTime = Math.max(originalTime, startTime);

        finalTime = Math.min(finalTime, endTime);

        return finalTime;

    }



    private static void addToUsagePeriodMap(
@@ -918,19 +940,6 @@ public final class DataProcessor { 
                eventTime);

    }



    private static int getFirstUsageEventIndex(

            final List<AppUsageEvent> appUsageEventList,

            final long startTimestampOfLevelData) {

        int currentIndex = 0;

        while (currentIndex < appUsageEventList.size()

                && (appUsageEventList.get(currentIndex) == null

                || appUsageEventList.get(currentIndex).getTimestamp()

                < startTimestampOfLevelData)) {

            currentIndex++;

        }

        return currentIndex;

    }



    private static void insertHourlyDeviceScreenOnTime(

            final Map<Integer, Map<Integer, Map<Long, Map<String, List<AppUsagePeriod>>>>>

                    appUsagePeriodMap,
@@ -1520,7 +1529,7 @@ public final class DataProcessor { 
                    foregroundUsageTimeInMs + backgroundUsageTimeInMs;

            if (totalUsageTimeInMs > TOTAL_HOURLY_TIME_THRESHOLD) {

                final float ratio = TOTAL_HOURLY_TIME_THRESHOLD / totalUsageTimeInMs;

                if (DEBUG) {

                if (sDebug) {

                    Log.w(TAG, String.format("abnormal usage time %d|%d for:\n%s",

                            Duration.ofMillis(foregroundUsageTimeInMs).getSeconds(),

                            Duration.ofMillis(backgroundUsageTimeInMs).getSeconds(),
@@ -1876,7 +1885,7 @@ public final class DataProcessor { 


    private static void log(Context context, final String content, final long timestamp,

            final BatteryHistEntry entry) {

        if (DEBUG) {

        if (sDebug) {

            Log.d(TAG, String.format(entry != null ? "%s %s:\n%s" : "%s %s:%s",

                    utcToLocalTime(context, timestamp), content, entry));

        }

src/com/android/settings/fuelgauge/batteryusage/DatabaseUtils.java

+9 −1
Original line number Diff line number Diff line
@@ -74,6 +74,11 @@ public final class DatabaseUtils { 
    public static final String QUERY_KEY_USERID = "userid";



    public static final long INVALID_USER_ID = Integer.MIN_VALUE;

    /**

     * The buffer hours to query app usage events that may have begun or ended out of the final

     * desired time frame.

     */

    public static final long USAGE_QUERY_BUFFER_HOURS = Duration.ofHours(3).toMillis();



    /** A content URI to access battery usage states data. */

    public static final Uri BATTERY_CONTENT_URI =
@@ -138,7 +143,10 @@ public final class DatabaseUtils { 
            final long startTimestampOfLevelData) {

        final long startTime = System.currentTimeMillis();

        final long sixDaysAgoTimestamp = getTimestampSixDaysAgo(calendar);

        final long queryTimestamp = Math.max(startTimestampOfLevelData, sixDaysAgoTimestamp);

        // Query a longer time period and then trim to the original time period in order to make

        // sure the app usage calculation near the boundaries is correct.

        final long queryTimestamp =

                Math.max(startTimestampOfLevelData, sixDaysAgoTimestamp) - USAGE_QUERY_BUFFER_HOURS;

        Log.d(TAG, "sixDayAgoTimestamp: " + sixDaysAgoTimestamp);

        final String queryUserIdString = userIds.stream()

                .map(userId -> String.valueOf(userId))

tests/robotests/src/com/android/settings/fuelgauge/batteryusage/DataProcessorTest.java

+53 −46
Original line number Diff line number Diff line
@@ -178,22 +178,22 @@ public final class DataProcessorTest { 


    @Test

    public void generateAppUsagePeriodMap_returnExpectedResult() {

        DataProcessor.sDebug = true;

        final List<BatteryLevelData.PeriodBatteryLevelData> hourlyBatteryLevelsPerDay =

                new ArrayList<>();

        final String packageName = "com.android.settings";

        // Adds the day 1 data.

        final List<Long> timestamps1 = List.of(10000L, 20000L, 30000L);

        final List<Long> timestamps1 = List.of(14400000L, 18000000L, 21600000L);

        final List<Integer> levels1 = List.of(100, 100, 100);

        hourlyBatteryLevelsPerDay.add(

                new BatteryLevelData.PeriodBatteryLevelData(timestamps1, levels1));

        // Adds the day 2 data.

        hourlyBatteryLevelsPerDay.add(null);

        // Adds the day 3 data.

        final List<Long> timestamps2 = List.of(40000L, 50000L);

        final List<Long> timestamps2 = List.of(45200000L, 48800000L);

        final List<Integer> levels2 = List.of(100, 100);

        hourlyBatteryLevelsPerDay.add(

                new BatteryLevelData.PeriodBatteryLevelData(timestamps2, levels2));

        final long startTimestampOfLevelData = 10000L;

        final List<AppUsageEvent> appUsageEventList = new ArrayList<>();

        // Adds some events before the start timestamp.

        appUsageEventList.add(buildAppUsageEvent(
@@ -204,39 +204,48 @@ public final class DataProcessorTest { 
                /*instanceId=*/ 2, packageName));

        // Adds the valid app usage events.

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 10000L, /*userId=*/ 1,

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 4200000L, /*userId=*/ 1,

                /*instanceId=*/ 2, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 15000L, /*userId=*/ 1,

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 4500000L, /*userId=*/ 1,

                /*instanceId=*/ 2, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 12000L, /*userId=*/ 2,

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 12600000L, /*userId=*/ 2,

                /*instanceId=*/ 3, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 18000L, /*userId=*/ 2,

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 15600000L, /*userId=*/ 2,

                /*instanceId=*/ 3, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 35000L, /*userId=*/ 1,

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 16200000L, /*userId=*/ 2,

                /*instanceId=*/ 3, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 18000000L, /*userId=*/ 2,

                /*instanceId=*/ 3, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 17200000L, /*userId=*/ 1,

                /*instanceId=*/ 2, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 45000L, /*userId=*/ 1,

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 17800000L, /*userId=*/ 1,

                /*instanceId=*/ 2, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 42000L, /*userId=*/ 1,

                /*instanceId=*/ 4, packageName));

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 46000000L, /*userId=*/ 1,

                /*instanceId=*/ 2, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 52000L, /*userId=*/ 1,

                /*instanceId=*/ 4, packageName));

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 47800000L, /*userId=*/ 1,

                /*instanceId=*/ 2, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 49000000L, /*userId=*/ 1,

                /*instanceId=*/ 2, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 55000L, /*userId=*/ 1,

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 59600000L, /*userId=*/ 1,

                /*instanceId=*/ 4, packageName));

        appUsageEventList.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 58000L, /*userId=*/ 1,

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 61200000L, /*userId=*/ 1,

                /*instanceId=*/ 4, packageName));



        final Map<Integer, Map<Integer, Map<Long, Map<String, List<AppUsagePeriod>>>>> periodMap =

                DataProcessor.generateAppUsagePeriodMap(

                        hourlyBatteryLevelsPerDay, appUsageEventList, startTimestampOfLevelData);

                        hourlyBatteryLevelsPerDay, appUsageEventList);



        assertThat(periodMap.size()).isEqualTo(3);

        // Day 1
@@ -246,11 +255,12 @@ public final class DataProcessorTest { 
        Map<String, List<AppUsagePeriod>> userMap = hourlyMap.get(1L);

        assertThat(userMap.size()).isEqualTo(1);

        assertThat(userMap.get(packageName).size()).isEqualTo(1);

        assertAppUsagePeriod(userMap.get(packageName).get(0), 10000, 15000);

        assertAppUsagePeriod(userMap.get(packageName).get(0), 17200000L, 17800000L);

        userMap = hourlyMap.get(2L);

        assertThat(userMap.size()).isEqualTo(1);

        assertThat(userMap.get(packageName).size()).isEqualTo(1);

        assertAppUsagePeriod(userMap.get(packageName).get(0), 12000, 18000);

        assertThat(userMap.get(packageName).size()).isEqualTo(2);

        assertAppUsagePeriod(userMap.get(packageName).get(0), 14400000L, 15600000L);

        assertAppUsagePeriod(userMap.get(packageName).get(1), 16200000L, 18000000L);

        hourlyMap = periodMap.get(0).get(1);

        assertThat(hourlyMap).isNull();

        // Day 2
@@ -262,8 +272,8 @@ public final class DataProcessorTest { 
        userMap = hourlyMap.get(1L);

        assertThat(userMap.size()).isEqualTo(1);

        assertThat(userMap.get(packageName).size()).isEqualTo(2);

        assertAppUsagePeriod(userMap.get(packageName).get(0), 40000, 45000);

        assertAppUsagePeriod(userMap.get(packageName).get(1), 42000, 50000);

        assertAppUsagePeriod(userMap.get(packageName).get(0), 45970000L, 46000000L);

        assertAppUsagePeriod(userMap.get(packageName).get(1), 47800000L, 48800000L);

    }



    @Test
@@ -273,7 +283,7 @@ public final class DataProcessorTest { 
        hourlyBatteryLevelsPerDay.add(

                new BatteryLevelData.PeriodBatteryLevelData(new ArrayList<>(), new ArrayList<>()));

        assertThat(DataProcessor.generateAppUsagePeriodMap(

                hourlyBatteryLevelsPerDay, new ArrayList<>(), 0)).isNull();

                hourlyBatteryLevelsPerDay, new ArrayList<>())).isNull();

    }



    @Test
@@ -1508,9 +1518,19 @@ public final class DataProcessorTest { 
    @Test

    public void buildAppUsagePeriodListPerInstance_returnExpectedResult() {

        final List<AppUsageEvent> appUsageEvents = new ArrayList<>();

        // Fake data earlier than time range.

        appUsageEvents.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 1));

        appUsageEvents.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 2));

        // Fake resume event earlier than time range.

        appUsageEvents.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 3));

        appUsageEvents.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 120000));

        // Fake normal data.

        appUsageEvents.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 100000));

                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 150000));

        appUsageEvents.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 200000));

        // Fake two adjacent resume events.
@@ -1540,29 +1560,16 @@ public final class DataProcessorTest { 
                AppUsageEventType.ACTIVITY_RESUMED, /*timestamp=*/ 1000000));



        final List<AppUsagePeriod> appUsagePeriodList =

                DataProcessor.buildAppUsagePeriodListPerInstance(appUsageEvents, 0, 1100000);



        assertThat(appUsagePeriodList.size()).isEqualTo(6);

        assertAppUsagePeriod(appUsagePeriodList.get(0), 100000, 200000);

        assertAppUsagePeriod(appUsagePeriodList.get(1), 300000, 500000);

        assertAppUsagePeriod(appUsagePeriodList.get(2), 570000, 600000);

        assertAppUsagePeriod(appUsagePeriodList.get(3), 700000, 730000);

        assertAppUsagePeriod(appUsagePeriodList.get(4), 900000, 910000);

        assertAppUsagePeriod(appUsagePeriodList.get(5), 1000000, 1100000);

    }



    @Test

    public void buildAppUsagePeriodListPerInstance_notMetStart_returnExpectedResult() {

        final List<AppUsageEvent> appUsageEvents = new ArrayList<>();

        // Start with stop event.

        appUsageEvents.add(buildAppUsageEvent(

                AppUsageEventType.ACTIVITY_STOPPED, /*timestamp=*/ 100000));



        final List<AppUsagePeriod> appUsagePeriodList =

                DataProcessor.buildAppUsagePeriodListPerInstance(appUsageEvents, 0, 200000);



        assertThat(appUsageEvents.size()).isEqualTo(1);

        assertAppUsagePeriod(appUsagePeriodList.get(0), 0, 100000);

                DataProcessor.buildAppUsagePeriodListPerInstance(appUsageEvents, 100000, 1100000);



        assertThat(appUsagePeriodList.size()).isEqualTo(7);

        assertAppUsagePeriod(appUsagePeriodList.get(0), 100000, 120000);

        assertAppUsagePeriod(appUsagePeriodList.get(1), 150000, 200000);

        assertAppUsagePeriod(appUsagePeriodList.get(2), 300000, 500000);

        assertAppUsagePeriod(appUsagePeriodList.get(3), 570000, 600000);

        assertAppUsagePeriod(appUsagePeriodList.get(4), 700000, 730000);

        assertAppUsagePeriod(appUsagePeriodList.get(5), 900000, 910000);

        assertAppUsagePeriod(appUsagePeriodList.get(6), 1000000, 1100000);

    }



    @Test