/*
 * Copyright 2014 Goldman Sachs.
 *
 * 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.gs.collections.impl.parallel;

import java.util.ArrayList;
import java.util.Collection;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicInteger;

import com.gs.collections.impl.list.Interval;
import org.junit.Assert;
import org.junit.Test;

/**
 * JUnit test for {@link ParallelIterate}.
 */
public class ParallelIterate2Test
{
    /**
     * crude test to check that creation works and that all tasks are executed
     */
    @Test
    public void creationAndExecution() throws InterruptedException
    {
        int howManyTimes = 200;
        AtomicInteger counter = new AtomicInteger(0);

        Collection<Callable<Integer>> tasks = new ArrayList<>();

        Interval.oneTo(howManyTimes).run(() -> tasks.add(counter::getAndIncrement));

        ExecutorService executorService1 = ParallelIterate.newPooledExecutor(4, "test pool 2 4", true);
        executorService1.invokeAll(tasks);
        Assert.assertEquals(howManyTimes, counter.get());

        counter.set(0);
        ExecutorService executorService2 = ParallelIterate.newPooledExecutor(2, "test pool 2", true);
        executorService2.invokeAll(tasks);
        Assert.assertEquals(howManyTimes, counter.get());
    }
}