/**
*
* 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.SmallTests;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.assertEquals;
/**
* Tests for the bit comparator
*/
@Category(SmallTests.class)
public class TestBitComparator {
private static byte[] zeros = new byte[]{0, 0, 0, 0, 0, 0};
private static byte[] ones = new byte[]{1, 1, 1, 1, 1, 1};
private static byte[] data0 = new byte[]{0, 1, 2, 4, 8, 15};
private static byte[] data1 = new byte[]{15, 0, 0, 0, 0, 0};
private static byte[] data2 = new byte[]{0, 0, 0, 0, 0, 15};
private static byte[] data3 = new byte[]{15, 15, 15, 15, 15};
// data for testing compareTo method with offset and length parameters
private static byte[] data1_2 = new byte[]{15, 15, 0, 0, 0, 0, 0, 15};
private static byte[] data2_2 = new byte[]{15, 0, 0, 0, 0, 0, 15, 15};
private final int Equal = 0;
private final int NotEqual = 1;
@Test
public void testANDOperation() {
testOperation(zeros, ones, BitComparator.BitwiseOp.AND, NotEqual);
testOperation(data1, ones, BitComparator.BitwiseOp.AND, Equal);
testOperation(data1, data0, BitComparator.BitwiseOp.AND, NotEqual);
testOperation(data2, data1, BitComparator.BitwiseOp.AND, NotEqual);
testOperation(ones, data0, BitComparator.BitwiseOp.AND, Equal);
testOperation(ones, data3, BitComparator.BitwiseOp.AND, NotEqual);
}
@Test
public void testOROperation() {
testOperation(ones, zeros, BitComparator.BitwiseOp.OR, Equal);
testOperation(zeros, zeros, BitComparator.BitwiseOp.OR, NotEqual);
testOperation(data1, zeros, BitComparator.BitwiseOp.OR, Equal);
testOperation(data2, data1, BitComparator.BitwiseOp.OR, Equal);
testOperation(ones, data3, BitComparator.BitwiseOp.OR, NotEqual);
}
@Test
public void testXOROperation() {
testOperation(ones, zeros, BitComparator.BitwiseOp.XOR, Equal);
testOperation(zeros, zeros, BitComparator.BitwiseOp.XOR, NotEqual);
testOperation(ones, ones, BitComparator.BitwiseOp.XOR, NotEqual);
testOperation(data2, data1, BitComparator.BitwiseOp.XOR, Equal);
testOperation(ones, data3, BitComparator.BitwiseOp.XOR, NotEqual);
}
private void testOperation(byte[] data, byte[] comparatorBytes, BitComparator.BitwiseOp operator, int expected) {
BitComparator comparator = new BitComparator(comparatorBytes, operator);
assertEquals(comparator.compareTo(data), expected);
}
@Test
public void testANDOperationWithOffset() {
testOperationWithOffset(data1_2, ones, BitComparator.BitwiseOp.AND, Equal);
testOperationWithOffset(data1_2, data0, BitComparator.BitwiseOp.AND, NotEqual);
testOperationWithOffset(data2_2, data1, BitComparator.BitwiseOp.AND, NotEqual);
}
@Test
public void testOROperationWithOffset() {
testOperationWithOffset(data1_2, zeros, BitComparator.BitwiseOp.OR, Equal);
testOperationWithOffset(data2_2, data1, BitComparator.BitwiseOp.OR, Equal);
}
@Test
public void testXOROperationWithOffset() {
testOperationWithOffset(data2_2, data1, BitComparator.BitwiseOp.XOR, Equal);
}
private void testOperationWithOffset(byte[] data, byte[] comparatorBytes, BitComparator.BitwiseOp operator, int expected) {
BitComparator comparator = new BitComparator(comparatorBytes, operator);
assertEquals(comparator.compareTo(data, 1, comparatorBytes.length), expected);
}
}