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 com.datastax.oss.protocol.internal.util.Bytes;
  import org.junit.Test;
  
  /** @see TokenRangeTest */
  public class ByteOrderedTokenRangeTest {
  
    private static final String MIN = "0x";
  
    @Test
    public void should_split_range() {
      assertThat(range("0x0a", "0x0d").splitEvenly(3))
          .containsExactly(range("0x0a", "0x0b"), range("0x0b", "0x0c"), range("0x0c", "0x0d"));
    }
  
    @Test
    public void should_split_range_producing_empty_splits_near_ring_end() {
      // 0x00 is the first token following min.
      // This is an edge case where we want to make sure we don't accidentally generate the ]min,min]
      // range (which is the whole ring):
      assertThat(range(MIN, "0x00").splitEvenly(3))
          .containsExactly(range(MIN, "0x00"), range("0x00", "0x00"), range("0x00", "0x00"));
    }
  
    @Test
    public void should_split_range_when_padding_produces_same_token() {
      // To compute the ranges, we pad with trailing zeroes until the range is big enough for the
      // number of splits.
      // But in this case padding produces the same token 0x1100, so adding more zeroes wouldn't help.
      assertThat(range("0x11", "0x1100").splitEvenly(3))
          .containsExactly(
              range("0x11", "0x1100"), range("0x1100", "0x1100"), range("0x1100", "0x1100"));
    }
  
    @Test
    public void should_split_range_that_wraps_around_the_ring() {
      assertThat(range("0x0d", "0x0a").splitEvenly(2))
          .containsExactly(range("0x0d", "0x8c"), range("0x8c", "0x0a"));
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void should_fail_to_split_whole_ring() {
      range(MIN, MIN).splitEvenly(1);
    }
  
    private ByteOrderedTokenRange range(String start, String end) {
      return new ByteOrderedTokenRange(
          new ByteOrderedToken(Bytes.fromHexString(start)),
          new ByteOrderedToken(Bytes.fromHexString(end)));
    }
  }
  