/*
* 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 com.android.example.github.util;
import org.junit.runner.Description;
import android.arch.core.executor.testing.CountingTaskExecutorRule;
import android.support.test.espresso.Espresso;
import android.support.test.espresso.IdlingResource;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* A Junit rule that registers Architecture Components' background threads as an Espresso idling
* resource.
*/
public class TaskExecutorWithIdlingResourceRule extends CountingTaskExecutorRule {
private CopyOnWriteArrayList<IdlingResource.ResourceCallback> callbacks =
new CopyOnWriteArrayList<>();
@Override
protected void starting(Description description) {
Espresso.registerIdlingResources(new IdlingResource() {
@Override
public String getName() {
return "architecture components idling resource";
}
@Override
public boolean isIdleNow() {
return TaskExecutorWithIdlingResourceRule.this.isIdle();
}
@Override
public void registerIdleTransitionCallback(ResourceCallback callback) {
callbacks.add(callback);
}
});
super.starting(description);
}
@Override
protected void onIdle() {
super.onIdle();
for (IdlingResource.ResourceCallback callback : callbacks) {
callback.onTransitionToIdle();
}
}
}