content: /*
   *
   *  * 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.ambari.server.stack;
  
  import static com.google.common.collect.Sets.newHashSet;
  import static com.google.common.collect.Sets.newLinkedHashSet;
  import static java.util.Arrays.asList;
  import static java.util.Collections.emptyList;
  import static java.util.Collections.emptySet;
  import static java.util.Collections.singleton;
  import static org.hamcrest.collection.IsCollectionWithSize.hasSize;
  import static org.hamcrest.core.Is.is;
  import static org.junit.Assert.assertThat;
  
  import java.util.LinkedHashSet;
  
  import org.junit.Test;
  
  
  public class HostsTypeTest {
    @Test
    public void testGuessMasterFrom1() {
      HostsType hosts = HostsType.guessHighAvailability(newLinkedHashSet(asList("c6401")));
      assertThat(hosts.getMasters(), is(singleton("c6401")));
      assertThat(hosts.getSecondaries(), hasSize(0));
    }
  
    @Test
    public void testGuessMasterFrom3() {
      HostsType hosts = HostsType.guessHighAvailability(newLinkedHashSet(asList("c6401", "c6402", "c6403")));
      assertThat(hosts.getMasters(), is(singleton("c6401")));
      assertThat(hosts.getSecondaries(), is(newLinkedHashSet(asList("c6402", "c6403"))));
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void testGuessMasterFromEmptyList() {
      HostsType.guessHighAvailability(new LinkedHashSet<>(emptySet()));
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void testMasterIsMandatory() {
      new HostsType.HighAvailabilityHosts(null, emptyList());
    }
  
    @Test
    public void testFederatedMastersAndSecondaries() {
      HostsType federated = HostsType.federated(asList(
        new HostsType.HighAvailabilityHosts("master1", asList("sec1", "sec2")),
        new HostsType.HighAvailabilityHosts("master2", asList("sec3", "sec4"))),
        new LinkedHashSet<>(emptySet()));
      assertThat(federated.getMasters(), is(newHashSet("master1", "master2")));
      assertThat(federated.getSecondaries(), is(newHashSet("sec1", "sec2", "sec3", "sec4")));
    }
  
    @Test
    public void testArrangeHosts() {
      HostsType federated = HostsType.federated(asList(
        new HostsType.HighAvailabilityHosts("master1", asList("sec1", "sec2")),
        new HostsType.HighAvailabilityHosts("master2", asList("sec3", "sec4"))),
        new LinkedHashSet<>(emptySet()));
      federated.arrangeHostSecondariesFirst();
      assertThat(federated.getHosts(), is(newLinkedHashSet(asList("sec1", "sec2", "master1", "sec3", "sec4", "master2"))));
    }
  }