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.bookkeeper.client.impl;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import com.google.common.collect.Lists;
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.Unpooled;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  import org.apache.bookkeeper.client.api.LedgerEntry;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Unit test for {@link LedgerEntriesImpl}.
   */
  public class LedgerEntriesImplTest {
      private final int entryNumber = 7;
      private LedgerEntriesImpl ledgerEntriesImpl;
      private final List<LedgerEntry> entryList = Lists.newArrayList();
  
      // content for each entry
      private final long ledgerId = 1234L;
      private final long entryId = 5678L;
      private final long length = 9876L;
      private final byte[] dataBytes = "test-ledger-entry-impl".getBytes(UTF_8);
      private final ArrayList<ByteBuf> bufs = Lists.newArrayListWithExpectedSize(entryNumber);
  
      public LedgerEntriesImplTest () {
          for (int i = 0; i < entryNumber; i++) {
              ByteBuf buf = Unpooled.wrappedBuffer(dataBytes);
              bufs.add(buf);
  
              entryList.add(LedgerEntryImpl.create(ledgerId + i,
                  entryId + i,
                  length + i,
                  buf));
          }
  
          ledgerEntriesImpl = LedgerEntriesImpl.create(entryList);
      }
  
      @AfterEach
      public void tearDown() {
          ledgerEntriesImpl.close();
  
          // References should be released after close.
          bufs.forEach(byteBuf -> assertEquals(0, byteBuf.refCnt()));
  
          try {
              ledgerEntriesImpl.getEntry(entryId);
              fail("should fail getEntry after close");
          } catch (NullPointerException e) {
              // expected behavior
          }
  
          try {
              ledgerEntriesImpl.iterator();
              fail("should fail iterator after close");
          } catch (NullPointerException e) {
              // expected behavior
          }
      }
  
      @Test
      public void testGetEntry() {
          for (int i = 0; i < entryNumber; i++) {
              LedgerEntry entry = ledgerEntriesImpl.getEntry(entryId + i);
              assertEquals(entryList.get(i).getLedgerId(),  entry.getLedgerId());
              assertEquals(entryList.get(i).getEntryId(),  entry.getEntryId());
              assertEquals(entryList.get(i).getLength(),  entry.getLength());
  
              ByteBuf buf = entry.getEntryBuffer();
              byte[]  content = new byte[buf.readableBytes()];
              buf.readBytes(content);
              assertArrayEquals(dataBytes, content);
  
              assertEquals(1, entry.getEntryBuffer().refCnt());
          }
  
          try {
              LedgerEntry entry = ledgerEntriesImpl.getEntry(entryId - 1);
              fail("Should get IndexOutOfBoundsException");
          } catch (IndexOutOfBoundsException e) {
              // expected behavior
          }
  
          try {
              LedgerEntry entry = ledgerEntriesImpl.getEntry(entryId + entryNumber);
              fail("Should get IndexOutOfBoundsException");
          } catch (IndexOutOfBoundsException e) {
              // expected behavior
          }
      }
  
      @Test
      public void testIterator() {
          Iterator<LedgerEntry> entryIterator = ledgerEntriesImpl.iterator();
          entryIterator.forEachRemaining(ledgerEntry -> assertEquals(1, ledgerEntry.getEntryBuffer().refCnt()));
      }
  }
  