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/*
* Copyright (C) 2017 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.testing;
import android.util.ArrayMap;
import android.util.Log;
import org.junit.Assert;
import org.junit.rules.TestWatcher;
import org.junit.runner.Description;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class LeakCheck extends TestWatcher {
private final Map<String, Tracker> mTrackers = new HashMap<>();
public LeakCheck() {
}
@Override
protected void succeeded(Description description) {
verify();
}
public Tracker getTracker(String tag) {
Tracker t = mTrackers.get(tag);
if (t == null) {
t = new Tracker();
mTrackers.put(tag, t);
}
return t;
}
public void verify() {
mTrackers.values().forEach(Tracker::verify);
}
public static class LeakInfo {
private static final String TAG = "LeakInfo";
private List<Throwable> mThrowables = new ArrayList<>();
LeakInfo() {
}
public void addAllocation(Throwable t) {
// TODO: Drop off the first element in the stack trace here to have a cleaner stack.
mThrowables.add(t);
}
public void clearAllocations() {
mThrowables.clear();
}
void verify() {
if (mThrowables.size() == 0) return;
Log.e(TAG, "Listener or binding not properly released");
for (Throwable t : mThrowables) {
Log.e(TAG, "Allocation found", t);
}
StringWriter writer = new StringWriter();
mThrowables.get(0).printStackTrace(new PrintWriter(writer));
Assert.fail("Listener or binding not properly released\n"
+ writer.toString());
}
}
public static class Tracker {
private Map<Object, LeakInfo> mObjects = new ArrayMap<>();
public LeakInfo getLeakInfo(Object object) {
LeakInfo leakInfo = mObjects.get(object);
if (leakInfo == null) {
leakInfo = new LeakInfo();
mObjects.put(object, leakInfo);
}
return leakInfo;
}
void verify() {
mObjects.values().forEach(LeakInfo::verify);
}
}
}
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