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/**
* 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.filter;
import static org.junit.Assert.assertEquals;
import java.nio.ByteBuffer;
import org.apache.hadoop.hbase.HBaseClassTestRule;
import org.apache.hadoop.hbase.testclassification.FilterTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
/**
* Tests for the bit comparator
*/
@Category({FilterTests.class, SmallTests.class})
public class TestBitComparator {
@ClassRule
public static final HBaseClassTestRule CLASS_RULE =
HBaseClassTestRule.forClass(TestBitComparator.class);
private static byte[] zeros = new byte[]{0, 0, 0, 0, 0, 0};
private static ByteBuffer zeros_bb = ByteBuffer.wrap(zeros);
private static byte[] ones = new byte[]{1, 1, 1, 1, 1, 1};
private static ByteBuffer ones_bb = ByteBuffer.wrap(ones);
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 ByteBuffer data1_bb = ByteBuffer.wrap(data1);
private static byte[] data2 = new byte[]{0, 0, 0, 0, 0, 15};
private static ByteBuffer data2_bb = ByteBuffer.wrap(data2);
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 ByteBuffer data1_2_bb = ByteBuffer.wrap(data1_2);
private static byte[] data2_2 = new byte[]{15, 0, 0, 0, 0, 0, 15, 15};
private static ByteBuffer data2_2_bb = ByteBuffer.wrap(data2_2);
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);
testOperation(zeros_bb, ones, BitComparator.BitwiseOp.AND, NotEqual);
testOperation(data1_bb, ones, BitComparator.BitwiseOp.AND, Equal);
testOperation(data1_bb, data0, BitComparator.BitwiseOp.AND, NotEqual);
testOperation(data2_bb, data1, BitComparator.BitwiseOp.AND, NotEqual);
testOperation(ones_bb, data0, BitComparator.BitwiseOp.AND, Equal);
testOperation(ones_bb, 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);
testOperation(ones_bb, zeros, BitComparator.BitwiseOp.OR, Equal);
testOperation(zeros_bb, zeros, BitComparator.BitwiseOp.OR, NotEqual);
testOperation(data1_bb, zeros, BitComparator.BitwiseOp.OR, Equal);
testOperation(data2_bb, data1, BitComparator.BitwiseOp.OR, Equal);
testOperation(ones_bb, 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);
testOperation(ones_bb, zeros, BitComparator.BitwiseOp.XOR, Equal);
testOperation(zeros_bb, zeros, BitComparator.BitwiseOp.XOR, NotEqual);
testOperation(ones_bb, ones, BitComparator.BitwiseOp.XOR, NotEqual);
testOperation(data2_bb, data1, BitComparator.BitwiseOp.XOR, Equal);
testOperation(ones_bb, data3, BitComparator.BitwiseOp.XOR, NotEqual);
}
private void testOperation(byte[] data, byte[] comparatorBytes, BitComparator.BitwiseOp operator,
int expected) {
BitComparator comparator = new BitComparator(comparatorBytes, operator);
assertEquals(expected, comparator.compareTo(data));
}
private void testOperation(ByteBuffer data, byte[] comparatorBytes,
BitComparator.BitwiseOp operator, int expected) {
BitComparator comparator = new BitComparator(comparatorBytes, operator);
assertEquals(expected, comparator.compareTo(data, 0, data.capacity()));
}
@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);
testOperationWithOffset(data1_2_bb, ones, BitComparator.BitwiseOp.AND, Equal);
testOperationWithOffset(data1_2_bb, data0, BitComparator.BitwiseOp.AND, NotEqual);
testOperationWithOffset(data2_2_bb, 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);
testOperationWithOffset(data1_2_bb, zeros, BitComparator.BitwiseOp.OR, Equal);
testOperationWithOffset(data2_2_bb, data1, BitComparator.BitwiseOp.OR, Equal);
}
@Test
public void testXOROperationWithOffset() {
testOperationWithOffset(data2_2, data1, BitComparator.BitwiseOp.XOR, Equal);
testOperationWithOffset(data2_2_bb, data1, BitComparator.BitwiseOp.XOR, Equal);
}
private void testOperationWithOffset(byte[] data, byte[] comparatorBytes,
BitComparator.BitwiseOp operator, int expected) {
BitComparator comparator = new BitComparator(comparatorBytes, operator);
assertEquals(expected, comparator.compareTo(data, 1, comparatorBytes.length));
}
private void testOperationWithOffset(ByteBuffer data, byte[] comparatorBytes,
BitComparator.BitwiseOp operator, int expected) {
BitComparator comparator = new BitComparator(comparatorBytes, operator);
assertEquals(expected, comparator.compareTo(data, 1, comparatorBytes.length));
}
}