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/*
* Copyright (C) 2019 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.experimentalcar;
import static com.google.common.truth.Truth.assertThat;
import android.car.experimental.DriverAwarenessEvent;
import android.car.experimental.DriverAwarenessSupplierConfig;
import android.car.experimental.DriverAwarenessSupplierService;
import android.car.experimental.IDriverAwarenessSupplier;
import android.car.experimental.IDriverAwarenessSupplierCallback;
import android.content.Context;
import android.os.RemoteException;
import android.util.Pair;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnitRunner;
import java.util.Arrays;
@RunWith(MockitoJUnitRunner.class)
public class DriverDistractionExperimentalFeatureServiceTest {
private static final long INITIAL_TIME = 1000L;
private static final long PREFERRED_SUPPLIER_STALENESS = 10L;
private final IDriverAwarenessSupplier mFallbackSupplier =
new IDriverAwarenessSupplier.Stub() {
@Override
public void onReady() throws RemoteException {
}
@Override
public void setCallback(IDriverAwarenessSupplierCallback callback)
throws RemoteException {
}
};
private final DriverAwarenessSupplierConfig mFallbackConfig = new DriverAwarenessSupplierConfig(
DriverAwarenessSupplierService.NO_STALENESS);
private final IDriverAwarenessSupplier mPreferredSupplier =
new IDriverAwarenessSupplier.Stub() {
@Override
public void onReady() throws RemoteException {
}
@Override
public void setCallback(IDriverAwarenessSupplierCallback callback)
throws RemoteException {
}
};
private final DriverAwarenessSupplierConfig mPreferredSupplierConfig =
new DriverAwarenessSupplierConfig(PREFERRED_SUPPLIER_STALENESS);
@Mock
private Context mContext;
private DriverDistractionExperimentalFeatureService mService;
private FakeTimeSource mTimeSource;
private FakeTimer mTimer;
@Before
public void setUp() throws Exception {
mTimeSource = new FakeTimeSource(INITIAL_TIME);
mTimer = new FakeTimer();
mService = new DriverDistractionExperimentalFeatureService(mContext, mTimeSource, mTimer);
}
@After
public void tearDown() throws Exception {
if (mService != null) {
mService.release();
}
}
@Test
public void testHandleDriverAwarenessEvent_updatesCurrentValue_withLatestEvent()
throws Exception {
mService.setDriverAwarenessSuppliers(Arrays.asList(
new Pair<>(mFallbackSupplier, mFallbackConfig)));
float firstEmittedEvent = 0.7f;
emitEvent(mFallbackSupplier, INITIAL_TIME + 1, firstEmittedEvent);
assertThat(getCurrentAwarenessValue()).isEqualTo(firstEmittedEvent);
}
@Test
public void testHandleDriverAwarenessEvent_hasPreferredEvent_ignoresFallbackEvent()
throws Exception {
mService.setDriverAwarenessSuppliers(Arrays.asList(
new Pair<>(mFallbackSupplier, mFallbackConfig),
new Pair<>(mPreferredSupplier, mPreferredSupplierConfig)));
// emit an event from the preferred supplier before the fallback supplier
float preferredValue = 0.6f;
emitEvent(mPreferredSupplier, INITIAL_TIME + 1, preferredValue);
float fallbackValue = 0.7f;
emitEvent(mFallbackSupplier, INITIAL_TIME + 2, fallbackValue);
// even though the fallback supplier has a more recent timestamp, it is not the current
// since the event from the preferred supplier is still fresh
assertThat(getCurrentAwarenessValue()).isEqualTo(preferredValue);
}
@Test
public void testHandleDriverAwarenessEvent_ignoresOldEvents() throws Exception {
mService.setDriverAwarenessSuppliers(Arrays.asList(
new Pair<>(mFallbackSupplier, mFallbackConfig)));
float firstEmittedEvent = 0.7f;
emitEvent(mFallbackSupplier, INITIAL_TIME + 1, firstEmittedEvent);
long oldTime = INITIAL_TIME - 100;
emitEvent(mFallbackSupplier, oldTime, 0.6f);
// the event with the old timestamp shouldn't overwrite the value with a more recent
// timestamp
assertThat(getCurrentAwarenessValue()).isEqualTo(firstEmittedEvent);
}
@Test
public void testPreferredAwarenessEvent_becomesStale_fallsBackToFallbackEvent()
throws Exception {
mService.setDriverAwarenessSuppliers(Arrays.asList(
new Pair<>(mFallbackSupplier, mFallbackConfig),
new Pair<>(mPreferredSupplier, mPreferredSupplierConfig)));
// emit an event from the preferred supplier before the fallback supplier
float preferredValue = 0.6f;
long preferredEventTime = INITIAL_TIME + 1;
mTimeSource.setElapsedRealtime(preferredEventTime);
emitEvent(mPreferredSupplier, preferredEventTime, preferredValue);
float fallbackValue = 0.7f;
long fallbackEventTime = INITIAL_TIME + 2;
mTimeSource.setElapsedRealtime(fallbackEventTime);
emitEvent(mFallbackSupplier, fallbackEventTime, fallbackValue);
// the preferred supplier still has a fresh event
assertThat(getCurrentAwarenessValue()).isEqualTo(preferredValue);
// go into the future
mTimeSource.setElapsedRealtime(preferredEventTime + PREFERRED_SUPPLIER_STALENESS + 1);
mTimer.executePendingTask();
// the preferred supplier's data has become stale
assertThat(getCurrentAwarenessValue()).isEqualTo(fallbackValue);
}
private float getCurrentAwarenessValue() {
return mService.getCurrentDriverAwareness().mAwarenessEvent.getAwarenessValue();
}
/**
* Handle an event as if it were emitted from the specified supplier with the specified time and
* value.
*/
private void emitEvent(IDriverAwarenessSupplier supplier, long time, float value)
throws RemoteException {
long maxStaleness;
if (supplier == mFallbackSupplier) {
maxStaleness = DriverAwarenessSupplierService.NO_STALENESS;
} else {
maxStaleness = PREFERRED_SUPPLIER_STALENESS;
}
mService.handleDriverAwarenessEvent(
new DriverDistractionExperimentalFeatureService.DriverAwarenessEventWrapper(
new DriverAwarenessEvent(time, value),
supplier,
maxStaleness));
}
}
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