/**
* This code is released under the
* Apache License Version 2.0 http://www.apache.org/licenses/.
*/
package me.lemire.integercompression;
import java.util.Arrays;
import me.lemire.integercompression.differential.XorBinaryPacking;
import org.junit.Test;
import static org.junit.Assert.*;
/**
* @author lemire
*
*/
@SuppressWarnings({ "static-method" })
public final class XorBinaryPackingTest
{
private static void checkCompressAndUncompress(String label, int[] data) {
XorBinaryPacking codec = new XorBinaryPacking();
int[] compBuf = TestUtils.compress(codec, data);
int[] decompBuf = TestUtils.uncompress(codec, compBuf, data.length);
assertArrayEquals(data, decompBuf);
}
/**
*
*/
@Test
public void compressAndUncompress0() {
int[] data = new int[128];
Arrays.fill(data, 0, 31, 1);
Arrays.fill(data, 32, 63, 2);
Arrays.fill(data, 64, 95, 4);
Arrays.fill(data, 96, 127, 8);
checkCompressAndUncompress("compressAndUncompress0", data);
}
/**
*
*/
@Test
public void compressAndUncompress1() {
int[] data = new int[128];
for (int i = 0; i < data.length; ++i) {
data[i] = i;
}
checkCompressAndUncompress("compressAndUncompress1", data);
}
/**
*
*/
@Test
public void compressAndUncompress2() {
int[] data = new int[128];
for (int i = 0; i < data.length; ++i) {
data[i] = i * (i + 1) / 2;
}
checkCompressAndUncompress("compressAndUncompress2", data);
}
/**
*
*/
@Test
public void compressAndUncompress3() {
int[] data = new int[256];
Arrays.fill(data, 0, 127, 2);
Arrays.fill(data, 128, 255, 3);
checkCompressAndUncompress("compressAndUncompress3", data);
}
/**
*
*/
@Test
public void compressAndUncompress4() {
int[] data = new int[256];
Arrays.fill(data, 0, 127, 3);
Arrays.fill(data, 128, 255, 2);
checkCompressAndUncompress("compressAndUncompress4", data);
}
/**
*
*/
@Test
public void compressAndUncompress5() {
int[] data = new int[256];
for (int i = 0; i < data.length; ++i) {
data[i] = i;
}
checkCompressAndUncompress("compressAndUncompress5", data);
}
}