/**
    *
    * 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.hbase.mob;
  
  import java.io.IOException;
  import java.util.Random;
  
  import org.apache.hadoop.hbase.CellUtil;
  import org.apache.hadoop.hbase.KeyValue;
  import org.apache.hadoop.hbase.regionserver.StoreFile;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.junit.Assert;
  
  public class MobTestUtil {
    protected static final char FIRST_CHAR = 'a';
    protected static final char LAST_CHAR = 'z';
  
    protected static String generateRandomString(int demoLength) {
      String base = "abcdefghijklmnopqrstuvwxyz";
      Random random = new Random();
      StringBuffer sb = new StringBuffer();
      for (int i = 0; i < demoLength; i++) {
        int number = random.nextInt(base.length());
        sb.append(base.charAt(number));
      }
      return sb.toString();
    }
    protected static void writeStoreFile(final StoreFile.Writer writer, String caseName)
        throws IOException {
      writeStoreFile(writer, Bytes.toBytes(caseName), Bytes.toBytes(caseName));
    }
  
    /*
     * Writes HStoreKey and ImmutableBytes data to passed writer and then closes
     * it.
     *
     * @param writer
     *
     * @throws IOException
     */
    private static void writeStoreFile(final StoreFile.Writer writer, byte[] fam,
        byte[] qualifier) throws IOException {
      long now = System.currentTimeMillis();
      try {
        for (char d = FIRST_CHAR; d <= LAST_CHAR; d++) {
          for (char e = FIRST_CHAR; e <= LAST_CHAR; e++) {
            byte[] b = new byte[] { (byte) d, (byte) e };
            writer.append(new KeyValue(b, fam, qualifier, now, b));
          }
        }
      } finally {
        writer.close();
      }
    }
  
    /**
     * Compare two KeyValue only for their row family qualifier value
     */
    public static void assertKeyValuesEquals(KeyValue firstKeyValue,
  	      KeyValue secondKeyValue) {
  		    Assert.assertEquals(Bytes.toString(CellUtil.cloneRow(firstKeyValue)),
  	            Bytes.toString(CellUtil.cloneRow(secondKeyValue)));
  		    Assert.assertEquals(Bytes.toString(CellUtil.cloneFamily(firstKeyValue)),
  	            Bytes.toString(CellUtil.cloneFamily(secondKeyValue)));
  		    Assert.assertEquals(Bytes.toString(CellUtil.cloneQualifier(firstKeyValue)),
  	            Bytes.toString(CellUtil.cloneQualifier(secondKeyValue)));
  		    Assert.assertEquals(Bytes.toString(CellUtil.cloneValue(firstKeyValue)),
  	            Bytes.toString(CellUtil.cloneValue(secondKeyValue)));
  	  }
  }