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/*
* Copyright (C) 2018 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.launcher3.util;
/**
* Event tracker for reliably reproducing race conditions in tests.
* The app should call onEvent() for events that the test will try to reproduce in all possible
* orders.
*/
public class RaceConditionTracker {
public final static boolean ENTER = true;
public final static boolean EXIT = false;
static final String ENTER_POSTFIX = "enter";
static final String EXIT_POSTFIX = "exit";
public interface EventProcessor {
void onEvent(String eventName);
}
private static EventProcessor sEventProcessor;
static void setEventProcessor(EventProcessor eventProcessor) {
sEventProcessor = eventProcessor;
}
public static void onEvent(String eventName) {
if (sEventProcessor != null) sEventProcessor.onEvent(eventName);
}
public static void onEvent(String eventName, boolean isEnter) {
if (sEventProcessor != null) {
sEventProcessor.onEvent(enterExitEvt(eventName, isEnter));
}
}
public static String enterExitEvt(String eventName, boolean isEnter) {
return eventName + ":" + (isEnter ? ENTER_POSTFIX : EXIT_POSTFIX);
}
public static String enterEvt(String eventName) {
return enterExitEvt(eventName, ENTER);
}
public static String exitEvt(String eventName) {
return enterExitEvt(eventName, EXIT);
}
}
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