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/*
* Copyright (C) 2017-2022 Sebastiano Vigna
*
* 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 it.unimi.dsi.fastutil.ints;
import static org.junit.Assert.assertEquals;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteOrder;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;
import java.nio.file.StandardOpenOption;
import java.util.SplittableRandom;
import org.junit.Test;
import it.unimi.dsi.fastutil.io.FastBufferedOutputStream;
public class IntMappedBigListTest {
@Test
public void testReadWrite() throws IOException {
final File file = File.createTempFile(this.getClass().getName(), ".bin");
file.deleteOnExit();
SplittableRandom r = new SplittableRandom(0);
final DataOutputStream dos = new DataOutputStream(new FastBufferedOutputStream(new FileOutputStream(file)));
for (long i = 0; i < IntMappedBigList.CHUNK_SIZE + 10; i++) dos.writeInt(r.nextInt());
dos.close();
final IntMappedBigList list = IntMappedBigList.map(FileChannel.open(file.toPath(), StandardOpenOption.READ, StandardOpenOption.WRITE), ByteOrder.BIG_ENDIAN, MapMode.READ_WRITE);
r = new SplittableRandom(0);
for (long i = 0; i < IntMappedBigList.CHUNK_SIZE + 10; i++) assertEquals(Long.toString(i), r.nextInt(), list.getInt(i));
r = new SplittableRandom(0);
for (long i = 0; i < IntMappedBigList.CHUNK_SIZE - 10; i++) r.nextInt();
final int[] a = new int[20];
list.getElements(IntMappedBigList.CHUNK_SIZE - 10, a, 0, 20);
for (long i = IntMappedBigList.CHUNK_SIZE - 10; i < IntMappedBigList.CHUNK_SIZE + 10; i++) assertEquals(Long.toString(i), r.nextInt(), a[(int)(i - (IntMappedBigList.CHUNK_SIZE - 10))]);
r = new SplittableRandom(0);
list.getElements(1, a, 1, 19);
r.nextInt();
for (int i = 1; i < 20; i++) assertEquals(Long.toString(i), r.nextInt(), a[i]);
r = new SplittableRandom(1);
for (long i = 0; i < IntMappedBigList.CHUNK_SIZE + 10; i++) list.set(i, r.nextInt());
r = new SplittableRandom(1);
for (long i = 0; i < IntMappedBigList.CHUNK_SIZE + 10; i++) assertEquals(Long.toString(i), r.nextInt(), list.getInt(i));
file.delete();
}
@Test
public void testSmallEndian() throws IOException {
final File file = File.createTempFile(this.getClass().getName(), ".bin");
file.deleteOnExit();
final java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocate(10000);
buffer.order(ByteOrder.LITTLE_ENDIAN);
SplittableRandom r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) buffer.putInt(r.nextInt());
buffer.flip();
final FileChannel channel = FileChannel.open(file.toPath(), StandardOpenOption.WRITE);
channel.write(buffer);
channel.close();
final IntMappedBigList list = IntMappedBigList.map(FileChannel.open(file.toPath()), ByteOrder.LITTLE_ENDIAN);
r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) assertEquals(Long.toString(i), r.nextInt(), list.getInt(i));
final int[] a = new int[1];
r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) {
list.getElements(i, a, 0, 1);
assertEquals(Long.toString(i), r.nextInt(), a[0]);
}
final IntMappedBigList copy = list.copy();
r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) assertEquals(Long.toString(i), r.nextInt(), copy.getInt(i));
file.delete();
}
@Test
public void testBigEndian() throws IOException {
final File file = File.createTempFile(this.getClass().getName(), ".bin");
file.deleteOnExit();
final java.nio.ByteBuffer buffer = java.nio.ByteBuffer.allocate(10000);
buffer.order(ByteOrder.BIG_ENDIAN);
SplittableRandom r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) buffer.putInt(r.nextInt());
buffer.flip();
final FileChannel channel = FileChannel.open(file.toPath(), StandardOpenOption.WRITE);
channel.write(buffer);
channel.close();
final IntMappedBigList list = IntMappedBigList.map(FileChannel.open(file.toPath()), ByteOrder.BIG_ENDIAN);
r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) assertEquals(Long.toString(i), r.nextInt(), list.getInt(i));
final int[] a = new int[1];
r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) {
list.getElements(i, a, 0, 1);
assertEquals(Long.toString(i), r.nextInt(), a[0]);
}
final IntMappedBigList copy = list.copy();
r = new SplittableRandom(0);
for (long i = 0; i < 100; i++) assertEquals(Long.toString(i), r.nextInt(), copy.getInt(i));
file.delete();
}
}
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