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 com.datastax.oss.driver.internal.core.metadata.token;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  import java.math.BigInteger;
  import org.junit.Test;
  
  public class RandomTokenRangeTest {
  
    private static final String MIN = "-1";
    private static final String MAX = "170141183460469231731687303715884105728";
  
    @Test
    public void should_split_range() {
      assertThat(range("0", "127605887595351923798765477786913079296").splitEvenly(3))
          .containsExactly(
              range("0", "42535295865117307932921825928971026432"),
              range(
                  "42535295865117307932921825928971026432", "85070591730234615865843651857942052864"),
              range(
                  "85070591730234615865843651857942052864",
                  "127605887595351923798765477786913079296"));
    }
  
    @Test
    public void should_split_range_that_wraps_around_the_ring() {
      assertThat(
              range(
                      "127605887595351923798765477786913079296",
                      "85070591730234615865843651857942052864")
                  .splitEvenly(3))
          .containsExactly(
              range("127605887595351923798765477786913079296", "0"),
              range("0", "42535295865117307932921825928971026432"),
              range(
                  "42535295865117307932921825928971026432",
                  "85070591730234615865843651857942052864"));
    }
  
    @Test
    public void should_split_range_producing_empty_splits_near_ring_end() {
      // These are edge cases where we want to make sure we don't accidentally generate the ]min,min]
      // range (which is the whole ring)
      assertThat(range(MAX, MIN).splitEvenly(3))
          .containsExactly(range(MAX, MAX), range(MAX, MAX), range(MAX, MIN));
  
      assertThat(range(MIN, "0").splitEvenly(3))
          .containsExactly(range(MIN, "0"), range("0", "0"), range("0", "0"));
    }
  
    @Test
    public void should_split_whole_ring() {
      assertThat(range(MIN, MIN).splitEvenly(3))
          .containsExactly(
              range(MIN, "56713727820156410577229101238628035242"),
              range(
                  "56713727820156410577229101238628035242",
                  "113427455640312821154458202477256070485"),
              range("113427455640312821154458202477256070485", MIN));
    }
  
    private RandomTokenRange range(String start, String end) {
      return new RandomTokenRange(
          new RandomToken(new BigInteger(start)), new RandomToken(new BigInteger(end)));
    }
  }
  