/*
* Copyright 2015 MiLaboratory.com
*
* 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.
*/
package com.milaboratory.core.io.util;
import org.apache.commons.math3.random.RandomGenerator;
import org.apache.commons.math3.random.Well19937a;
import org.junit.Assert;
import org.junit.Test;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
public class IOUtilTest {
@Test
public void test1() throws Exception {
RandomGenerator rg = new Well19937a();
int count = 1000;
int[] values = new int[count];
for (int n = 0; n < 10; ++n) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
for (int i = 0; i < count; ++i) {
final int d = rg.nextInt(31);
values[i] = (rg.nextInt(Integer.MAX_VALUE) >>> d);
IOUtil.writeRawVarint32(bos, values[i]);
}
byte[] data = bos.toByteArray();
ByteArrayInputStream bis = new ByteArrayInputStream(data);
int g;
for (int i = 0; i < count; ++i) {
Assert.assertEquals(values[i], IOUtil.readRawVarint32(bis, -1));
}
Assert.assertEquals(-1, IOUtil.readRawVarint32(bis, -1));
}
}
@Test
public void test3() throws Exception {
RandomGenerator rg = new Well19937a();
int count = 1000;
int[] values = new int[count];
for (int n = 0; n < 10; ++n) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
for (int i = 0; i < count; ++i) {
final int d = rg.nextInt(31) + 1;
values[i] = (rg.nextInt(Integer.MAX_VALUE) >>> d);
if (rg.nextBoolean())
values[i] *= -1;
final int encoded = IOUtil.encodeZigZag32(values[i]);
Assert.assertTrue(-1 != encoded);
IOUtil.writeRawVarint32(bos, encoded);
}
byte[] data = bos.toByteArray();
ByteArrayInputStream bis = new ByteArrayInputStream(data);
int g;
for (int i = 0; i < count; ++i) {
Assert.assertEquals(values[i], IOUtil.decodeZigZag32(IOUtil.readRawVarint32(bis, -1)));
}
Assert.assertEquals(-1, IOUtil.readRawVarint32(bis, -1));
}
}
@Test
public void test2() throws Exception {
RandomGenerator rg = new Well19937a();
int count = 1000;
long[] values = new long[count];
for (int n = 0; n < 10; ++n) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
for (int i = 0; i < count; ++i) {
final int d = rg.nextInt(63) + 1;
values[i] = (rg.nextLong() >>> d);
IOUtil.writeRawVarint64(bos, values[i]);
}
byte[] data = bos.toByteArray();
ByteArrayInputStream bis = new ByteArrayInputStream(data);
int g;
for (int i = 0; i < count; ++i) {
Assert.assertEquals(values[i], IOUtil.readRawVarint64(bis, -1));
}
Assert.assertEquals(-1L, IOUtil.readRawVarint64(bis, -1));
}
}
@Test
public void test4() throws Exception {
RandomGenerator rg = new Well19937a();
int count = 1000;
long[] values = new long[count];
for (int n = 0; n < 10; ++n) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
for (int i = 0; i < count; ++i) {
final int d = rg.nextInt(63) + 1;
values[i] = (rg.nextLong() >>> d);
if (rg.nextBoolean())
values[i] *= -1;
final long encoded = IOUtil.encodeZigZag64(values[i]);
Assert.assertTrue(-1L != encoded);
IOUtil.writeRawVarint64(bos, encoded);
}
byte[] data = bos.toByteArray();
ByteArrayInputStream bis = new ByteArrayInputStream(data);
int g;
for (int i = 0; i < count; ++i) {
Assert.assertEquals(values[i], IOUtil.decodeZigZag64(IOUtil.readRawVarint64(bis, -1)));
}
Assert.assertEquals(-1L, IOUtil.readRawVarint64(bis, -1));
}
}
@Test
public void test111() throws Exception {
System.out.println(IOUtil.encodeZigZag32(-2));
System.out.println(IOUtil.encodeZigZag64(-2));
System.out.println(IOUtil.decodeZigZag32(-1));
System.out.println(IOUtil.decodeZigZag64(-1));
}
}