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19 package org.apache.hadoop.hbase.filter;
20
21 import org.apache.hadoop.hbase.testclassification.SmallTests;
22 import org.junit.Test;
23 import org.junit.experimental.categories.Category;
24
25 import static org.junit.Assert.assertEquals;
26
27
28
29
30 @Category(SmallTests.class)
31 public class TestBitComparator {
32
33 private static byte[] zeros = new byte[]{0, 0, 0, 0, 0, 0};
34 private static byte[] ones = new byte[]{1, 1, 1, 1, 1, 1};
35 private static byte[] data0 = new byte[]{0, 1, 2, 4, 8, 15};
36 private static byte[] data1 = new byte[]{15, 0, 0, 0, 0, 0};
37 private static byte[] data2 = new byte[]{0, 0, 0, 0, 0, 15};
38 private static byte[] data3 = new byte[]{15, 15, 15, 15, 15};
39
40
41 private static byte[] data1_2 = new byte[]{15, 15, 0, 0, 0, 0, 0, 15};
42 private static byte[] data2_2 = new byte[]{15, 0, 0, 0, 0, 0, 15, 15};
43
44 private final int Equal = 0;
45 private final int NotEqual = 1;
46
47 @Test
48 public void testANDOperation() {
49 testOperation(zeros, ones, BitComparator.BitwiseOp.AND, NotEqual);
50 testOperation(data1, ones, BitComparator.BitwiseOp.AND, Equal);
51 testOperation(data1, data0, BitComparator.BitwiseOp.AND, NotEqual);
52 testOperation(data2, data1, BitComparator.BitwiseOp.AND, NotEqual);
53 testOperation(ones, data0, BitComparator.BitwiseOp.AND, Equal);
54 testOperation(ones, data3, BitComparator.BitwiseOp.AND, NotEqual);
55 }
56
57 @Test
58 public void testOROperation() {
59 testOperation(ones, zeros, BitComparator.BitwiseOp.OR, Equal);
60 testOperation(zeros, zeros, BitComparator.BitwiseOp.OR, NotEqual);
61 testOperation(data1, zeros, BitComparator.BitwiseOp.OR, Equal);
62 testOperation(data2, data1, BitComparator.BitwiseOp.OR, Equal);
63 testOperation(ones, data3, BitComparator.BitwiseOp.OR, NotEqual);
64 }
65
66 @Test
67 public void testXOROperation() {
68 testOperation(ones, zeros, BitComparator.BitwiseOp.XOR, Equal);
69 testOperation(zeros, zeros, BitComparator.BitwiseOp.XOR, NotEqual);
70 testOperation(ones, ones, BitComparator.BitwiseOp.XOR, NotEqual);
71 testOperation(data2, data1, BitComparator.BitwiseOp.XOR, Equal);
72 testOperation(ones, data3, BitComparator.BitwiseOp.XOR, NotEqual);
73 }
74
75 private void testOperation(byte[] data, byte[] comparatorBytes, BitComparator.BitwiseOp operator, int expected) {
76 BitComparator comparator = new BitComparator(comparatorBytes, operator);
77 assertEquals(comparator.compareTo(data), expected);
78 }
79
80 @Test
81 public void testANDOperationWithOffset() {
82 testOperationWithOffset(data1_2, ones, BitComparator.BitwiseOp.AND, Equal);
83 testOperationWithOffset(data1_2, data0, BitComparator.BitwiseOp.AND, NotEqual);
84 testOperationWithOffset(data2_2, data1, BitComparator.BitwiseOp.AND, NotEqual);
85 }
86
87 @Test
88 public void testOROperationWithOffset() {
89 testOperationWithOffset(data1_2, zeros, BitComparator.BitwiseOp.OR, Equal);
90 testOperationWithOffset(data2_2, data1, BitComparator.BitwiseOp.OR, Equal);
91 }
92
93 @Test
94 public void testXOROperationWithOffset() {
95 testOperationWithOffset(data2_2, data1, BitComparator.BitwiseOp.XOR, Equal);
96 }
97
98 private void testOperationWithOffset(byte[] data, byte[] comparatorBytes, BitComparator.BitwiseOp operator, int expected) {
99 BitComparator comparator = new BitComparator(comparatorBytes, operator);
100 assertEquals(comparator.compareTo(data, 1, comparatorBytes.length), expected);
101 }
102 }
103