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.cassandra.locator;
  
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.distributed.test.log.ClusterMetadataTestHelper;
  import org.assertj.core.api.Assertions;
  
  import static org.junit.Assert.assertEquals;
  
  public class ReplicationFactorTest
  {
      @BeforeClass
      public static void setupClass()
      {
          DatabaseDescriptor.daemonInitialization();
          DatabaseDescriptor.setTransientReplicationEnabledUnsafe(true);
          ClusterMetadataTestHelper.setInstanceForTest();
      }
  
      @Test
      public void shouldParseValidRF()
      {
          assertRfParse("0", 0, 0);
          assertRfParse("3", 3, 0);
          assertRfParse("3/1", 3, 1);
          assertRfParse("5", 5, 0);
          assertRfParse("5/2", 5, 2);
      }
  
      @Test
      public void shouldFailOnInvalidRF()
      {
          assertRfParseFailure("-1", "Replication factor must be non-negative");
          assertRfParseFailure("3/3", "Transient replicas must be zero, or less than total replication factor");
          assertRfParseFailure("3/-1", "Amount of transient nodes should be strictly positive");
          assertRfParseFailure("3/4", "Transient replicas must be zero, or less than total replication factor");
          assertRfParseFailure("3/", "Replication factor format is <replicas> or <replicas>/<transient>");
          assertRfParseFailure("1/a", "For input string");
          assertRfParseFailure("a/1", "For input string");
          assertRfParseFailure("", "For input string");
      }
  
      @Test
      public void shouldRoundTripParseSimpleRF()
      {
          String rf = "3";
          assertEquals(rf, ReplicationFactor.fromString(rf).toParseableString());
      }
  
      @Test
      public void shouldRoundTripParseTransientRF()
      {
          String rf = "3/1";
          assertEquals(rf, ReplicationFactor.fromString(rf).toParseableString());
      }
  
      private static void assertRfParseFailure(String s, String error)
      {
          try
          {
              ReplicationFactor.fromString(s);
              Assert.fail("Expected IllegalArgumentException");
          }
          catch (IllegalArgumentException e)
          {
              Assertions.assertThat(e.getMessage()).contains(error);
          }
      }
  
      private static void assertRfParse(String s, int expectedReplicas, int expectedTrans)
      {
          ReplicationFactor rf = ReplicationFactor.fromString(s);
          assertEquals(expectedReplicas, rf.allReplicas);
          assertEquals(expectedTrans, rf.transientReplicas());
          assertEquals(expectedReplicas - expectedTrans, rf.fullReplicas);
      }
  }
  