/**
 * 
 *  Licensed 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.
 *  under the License.
 */

package org.apache.hadoop.hbase.filter;

import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.Assert;
import org.junit.Test;
import org.junit.experimental.categories.Category;

@Category(SmallTests.class)
public class TestNullComparator {

  @Test
  public void testNullValue()
  {
    // given
    byte[] value = null;
    NullComparator comparator = new NullComparator();

    // when
    int comp1 = comparator.compareTo(value);
    int comp2 = comparator.compareTo(value, 5, 15);

    // then
    Assert.assertEquals(0, comp1);
    Assert.assertEquals(0, comp2);
  }

  @Test
  public void testNonNullValue() {
    // given
    byte[] value = new byte[] { 0, 1, 2, 3, 4, 5 };
    NullComparator comparator = new NullComparator();

    // when
    int comp1 = comparator.compareTo(value);
    int comp2 = comparator.compareTo(value, 1, 3);

    // then
    Assert.assertEquals(1, comp1);
    Assert.assertEquals(1, comp2);
  }

  @Test
  public void testEmptyValue() {
    // given
    byte[] value = new byte[] { 0 };
    NullComparator comparator = new NullComparator();

    // when
    int comp1 = comparator.compareTo(value);
    int comp2 = comparator.compareTo(value, 1, 3);

    // then
    Assert.assertEquals(1, comp1);
    Assert.assertEquals(1, comp2);
  }

}