
package org.apache.hadoop.hbase.mapreduce;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.SmallTests;
import org.apache.hadoop.util.ReflectionUtils;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import java.util.HashSet;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

@Category(SmallTests.class)
public class TestTableSplit {
  @Test
  public void testHashCode() {
    TableSplit split1 = new TableSplit(TableName.valueOf("table"),
        "row-start".getBytes(),
        "row-end".getBytes(), "location");
    TableSplit split2 = new TableSplit(TableName.valueOf("table"),
        "row-start".getBytes(),
        "row-end".getBytes(), "location");
    assertEquals (split1, split2);
    assertTrue   (split1.hashCode() == split2.hashCode());
    HashSet<TableSplit> set = new HashSet<TableSplit>(2);
    set.add(split1);
    set.add(split2);
    assertTrue(set.size() == 1);
  }

  /**
   * length of region should not influence hashcode
   * */
  @Test
  public void testHashCode_length() {
    TableSplit split1 = new TableSplit(TableName.valueOf("table"),
            "row-start".getBytes(),
            "row-end".getBytes(), "location", 1984);
    TableSplit split2 = new TableSplit(TableName.valueOf("table"),
            "row-start".getBytes(),
            "row-end".getBytes(), "location", 1982);

    assertEquals (split1, split2);
    assertTrue   (split1.hashCode() == split2.hashCode());
    HashSet<TableSplit> set = new HashSet<TableSplit>(2);
    set.add(split1);
    set.add(split2);
    assertTrue(set.size() == 1);
  }

  /**
   * Length of region need to be properly serialized.
   * */
  @Test
  public void testLengthIsSerialized() throws Exception {
    TableSplit split1 = new TableSplit(TableName.valueOf("table"),
            "row-start".getBytes(),
            "row-end".getBytes(), "location", 666);

    TableSplit deserialized = new TableSplit(TableName.valueOf("table"),
            "row-start2".getBytes(),
            "row-end2".getBytes(), "location1");
    ReflectionUtils.copy(new Configuration(), split1, deserialized);

    Assert.assertEquals(666, deserialized.getLength());
  }

}

