/**
 * 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.hadoop.hdfs.server.blockmanagement;

import static org.apache.hadoop.hdfs.server.namenode.INodeId.INVALID_INODE_ID;
import static org.hamcrest.core.Is.is;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStorageInfo.AddBlockResult;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;

/**
 * This class provides tests for BlockInfo class, which is used in BlocksMap.
 * The test covers BlockList.listMoveToHead, used for faster block report
 * processing in DatanodeDescriptor.reportDiff.
 */

public class TestBlockInfo {

  private static final Log LOG = LogFactory
      .getLog("org.apache.hadoop.hdfs.TestBlockInfo");

  @Test
  public void testIsDeleted() {
    BlockInfo blockInfo = new BlockInfoContiguous((short) 3);
    BlockCollection bc = Mockito.mock(BlockCollection.class);
    blockInfo.setBlockCollectionId(1000);
    Assert.assertFalse(blockInfo.isDeleted());
    blockInfo.setBlockCollectionId(INVALID_INODE_ID);
    Assert.assertTrue(blockInfo.isDeleted());
  }

  @Test
  public void testAddStorage() throws Exception {
    BlockInfo blockInfo = new BlockInfoContiguous((short) 3);

    final DatanodeStorageInfo storage = DFSTestUtil.createDatanodeStorageInfo(
        "storageID", "127.0.0.1");

    boolean added = blockInfo.addStorage(storage, blockInfo);

    Assert.assertTrue(added);
    Assert.assertEquals(storage, blockInfo.getStorageInfo(0));
  }

  @Test
  public void testReplaceStorage() throws Exception {

    // Create two dummy storages.
    final DatanodeStorageInfo storage1 = DFSTestUtil.createDatanodeStorageInfo(
        "storageID1", "127.0.0.1");
    final DatanodeStorageInfo storage2 = new DatanodeStorageInfo(
        storage1.getDatanodeDescriptor(), new DatanodeStorage("storageID2"));
    final int NUM_BLOCKS = 10;
    BlockInfo[] blockInfos = new BlockInfo[NUM_BLOCKS];

    // Create a few dummy blocks and add them to the first storage.
    for (int i = 0; i < NUM_BLOCKS; ++i) {
      blockInfos[i] = new BlockInfoContiguous((short) 3);
      storage1.addBlock(blockInfos[i]);
    }

    // Try to move one of the blocks to a different storage.
    boolean added =
        storage2.addBlock(blockInfos[NUM_BLOCKS / 2]) == AddBlockResult.ADDED;
    Assert.assertThat(added, is(false));
    Assert.assertThat(blockInfos[NUM_BLOCKS/2].getStorageInfo(0), is(storage2));
  }

  @Test(expected=IllegalArgumentException.class)
  public void testAddStorageWithDifferentBlock() throws Exception {
    BlockInfo blockInfo1 = new BlockInfoContiguous(new Block(1000L), (short) 3);
    BlockInfo blockInfo2 = new BlockInfoContiguous(new Block(1001L), (short) 3);

    final DatanodeStorageInfo storage = DFSTestUtil.createDatanodeStorageInfo(
        "storageID", "127.0.0.1");
    blockInfo1.addStorage(storage, blockInfo2);
  }
}
