/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.policies;

import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.Schedulable;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.SchedulingPolicy;
import org.apache.hadoop.yarn.util.resource.Resources;
import org.junit.Before;
import org.junit.Test;

import java.util.ArrayList;
import java.util.Collection;

public class TestEmptyQueues {
  private Collection<? extends Schedulable> schedulables;

  @Before
  public void setup() {
    schedulables = new ArrayList<Schedulable>();
  }

  private void testComputeShares(SchedulingPolicy policy) {
    policy.computeShares(schedulables, Resources.none());
  }

  @Test (timeout = 1000)
  public void testFifoPolicy() {
    testComputeShares(SchedulingPolicy.getInstance(FifoPolicy.class));
  }

  @Test (timeout = 1000)
  public void testFairSharePolicy() {
    testComputeShares(SchedulingPolicy.getInstance(FairSharePolicy.class));
  }

  @Test (timeout = 1000)
  public void testDRFPolicy() {
    testComputeShares(
        SchedulingPolicy.getInstance(DominantResourceFairnessPolicy.class));
  }
}
