content: /*
   * Copyright 2015, 2024 StreamEx contributors
   *
   * Licensed 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 one.util.streamex;
  
  import org.junit.Test;
  
  import java.util.Spliterator;
  import java.util.stream.IntStream;
  import java.util.stream.LongStream;
  
  import static one.util.streamex.TestHelpers.checkSpliterator;
  import static org.junit.Assert.*;
  
  /**
   * @author Tagir Valeev
   */
  public class PrependSpliteratorTest {
      @Test
      public void testSpliterator() {
          checkSpliterator("prepend", IntStreamEx.range(100).boxed().toList(), () -> new PrependSpliterator<>(IntStream
                  .range(1, 100).spliterator(), 0));
          assertTrue(new PrependSpliterator<>(IntStream.range(1, 100).spliterator(), 0)
                  .hasCharacteristics(Spliterator.SIZED));
          assertTrue(new PrependSpliterator<>(LongStream.range(0, Long.MAX_VALUE - 2).spliterator(), 0L)
                  .hasCharacteristics(Spliterator.SIZED));
          assertFalse(new PrependSpliterator<>(LongStream.range(0, Long.MAX_VALUE - 1).spliterator(), 0L)
                  .hasCharacteristics(Spliterator.SIZED));
          assertFalse(new PrependSpliterator<>(LongStream.range(0, Long.MAX_VALUE).spliterator(), 0L)
                  .hasCharacteristics(Spliterator.SIZED));
          assertEquals(Long.MAX_VALUE - 1, new PrependSpliterator<>(
                  LongStream.range(0, Long.MAX_VALUE - 2).spliterator(), 0L).estimateSize());
          assertEquals(Long.MAX_VALUE,
              new PrependSpliterator<>(LongStream.range(0, Long.MAX_VALUE - 1).spliterator(), 0L).estimateSize());
          assertEquals(Long.MAX_VALUE, new PrependSpliterator<>(LongStream.range(0, Long.MAX_VALUE).spliterator(), 0L)
                  .estimateSize());
          
          PrependSpliterator<Integer> spltr = new PrependSpliterator<>(IntStream.range(1, 100).spliterator(), 0);
          spltr.tryAdvance(x -> assertEquals(0, (int) x));
          assertTrue(spltr.hasCharacteristics(Spliterator.SORTED));
      }
  }
  