lang/java/reef-runtime-local/src/test/java/org/apache/reef/runtime/local/driver/ResourceRequestQueueTest.java

/*
 * 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.reef.runtime.local.driver;

import org.apache.reef.runtime.common.driver.api.ResourceRequestEventImpl;
import org.junit.Assert;
import org.junit.Test;

/**
 * Test for ResourceRequestQueue.
 */
public class ResourceRequestQueueTest {

  @Test
  public void testEmptyAfterConstruction() {
    final ResourceRequestQueue q = new ResourceRequestQueue();
    Assert.assertFalse("A freshly generated queue should be empty", q.hasOutStandingRequests());
  }

  @Test
  public void testNotEmptyAfterInsert() {
    final ResourceRequestQueue q = new ResourceRequestQueue();
    q.add(getAlmostSatisfied());
    Assert.assertTrue("A queue should not be empty after an insert.", q.hasOutStandingRequests());
  }

  @Test
  public void testSatisfaction() {
    final ResourceRequestQueue q = new ResourceRequestQueue();
    for (int i = 0; i < 1; ++i) {
      q.add(getAlmostSatisfied());
      Assert.assertTrue("A queue should not be empty after an insert.", q.hasOutStandingRequests());
      q.satisfyOne();
      Assert.assertFalse("The queue should be empty after all requests have been satisfied",
          q.hasOutStandingRequests());
    }

    final int nInsert = 10;
    for (int i = 0; i < nInsert; ++i) {
      q.add(getAlmostSatisfied());
    }
    for (int i = 0; i < nInsert; ++i) {
      q.satisfyOne();
    }
    Assert.assertFalse("The queue should be empty after all requests have been satisfied", q.hasOutStandingRequests());
  }

  private ResourceRequest getAlmostSatisfied() {
    return new ResourceRequest(ResourceRequestEventImpl.newBuilder().setResourceCount(1).setMemorySize(128).build());
  }
}