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/*
* Copyright (C) 2015 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.tv.testing;
import com.android.tv.common.util.Clock;
import java.util.concurrent.TimeUnit;
/**
* Fake implementation of Clock suitable for testing.
*
* <p>The current time only changes if {@link #setCurrentTimeMillis(long)}, {@link #increment} or
* {@link #sleep(long)} is called.
*/
public class FakeClock implements Clock {
/** Creates a fake clock with the time set to now and the boot time set to now - 100,000. */
public static FakeClock createWithCurrentTime() {
long now = System.currentTimeMillis();
return new FakeClock(now, now - 100_000);
}
/** Creates a fake clock with the time set to zero. */
public static FakeClock createWithTimeOne() {
return new FakeClock(1L, 0L);
}
/** Creates a fake clock with the time set to {@code time}. */
public static FakeClock createWithTime(long time) {
return new FakeClock(time, 0L);
}
private long mCurrentTimeMillis;
private long mBootTimeMillis;
private FakeClock(long currentTimeMillis, long bootTimeMillis) {
mCurrentTimeMillis = currentTimeMillis;
mBootTimeMillis = bootTimeMillis;
}
public void setCurrentTimeMillis(long ms) {
if (ms < mBootTimeMillis) {
throw new IllegalStateException("current time can not be before boot time");
}
mCurrentTimeMillis = ms;
}
public void setBootTimeMillis(long ms) {
if (ms > mCurrentTimeMillis) {
throw new IllegalStateException("boot time can not be after current time");
}
mBootTimeMillis = ms;
}
/**
* Increment the current time by one unit of time.
*
* @param unit The time unit to increment by.
*/
public void increment(TimeUnit unit) {
increment(unit, 1);
}
/**
* Increment the current time by {@code amount} unit of time.
*
* @param unit The time unit to increment by.
* @param amount The amount of time units to increment by.
*/
public void increment(TimeUnit unit, long amount) {
mCurrentTimeMillis += unit.toMillis(amount);
}
@Override
public long currentTimeMillis() {
return mCurrentTimeMillis;
}
@Override
public long elapsedRealtime() {
return mCurrentTimeMillis - mBootTimeMillis;
}
@Override
public long uptimeMillis() {
return elapsedRealtime();
}
/** Sleep does not block it just updates the current time. */
@Override
public void sleep(long ms) {
// TODO: implement blocking if needed.
mCurrentTimeMillis += ms;
}
}
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