/*
    * 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.commons.collections4.bloomfilter;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.concurrent.ThreadLocalRandom;
  import java.util.function.LongPredicate;
  
  import org.junit.jupiter.api.Test;
  
  public class DefaultBitMapProducerTest extends AbstractBitMapProducerTest {
  
      class DefaultBitMapProducer implements BitMapProducer {
          long[] bitMaps;
  
          DefaultBitMapProducer(final long[] bitMaps) {
              this.bitMaps = bitMaps;
          }
  
          @Override
          public boolean forEachBitMap(final LongPredicate predicate) {
              for (final long bitmap : bitMaps) {
                  if (!predicate.test(bitmap)) {
                      return false;
                  }
              }
              return true;
          }
      }
  
      /**
       * Generates an array of random long values.
       * @param size the number of values to generate
       * @return the array of random values.
       */
      static long[] generateLongArray(final int size) {
          return ThreadLocalRandom.current().longs(size).toArray();
      }
  
      long[] values = generateLongArray(5);
  
      @Override
      protected BitMapProducer createEmptyProducer() {
          return new DefaultBitMapProducer(new long[0]);
      }
  
      @Override
      protected BitMapProducer createProducer() {
          return new DefaultBitMapProducer(values);
      }
  
      @Override
      protected boolean emptyIsZeroLength() {
          return true;
      }
  
      @Test
      public void testAsBitMapArrayLargeArray() {
          final long[] expected = generateLongArray(32);
          final BitMapProducer producer = predicate -> {
              for (final long l : expected) {
                  if (!predicate.test(l)) {
                      return false;
                  }
              }
              return true;
          };
          final long[] ary = producer.asBitMapArray();
          assertArrayEquals(expected, ary);
      }
  
      @Test
      public void testFromBitMapArray() {
          final int nOfBitMaps = BitMap.numberOfBitMaps(256);
          final long[] expected = generateLongArray(nOfBitMaps);
          final long[] ary = BitMapProducer.fromBitMapArray(expected).asBitMapArray();
          assertArrayEquals(expected, ary);
      }
  
      @Test
      public void testFromIndexProducer() {
          final int[] expected = DefaultIndexProducerTest.generateIntArray(10, 256);
          final IndexProducer ip = IndexProducer.fromIndexArray(expected);
         final long[] ary = BitMapProducer.fromIndexProducer(ip, 256).asBitMapArray();
         for (final int idx : expected) {
             assertTrue(BitMap.contains(ary, idx));
         }
     }
 }