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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.bytes;
import static org.junit.Assert.assertTrue;
import java.util.Random;
import org.junit.Test;
import it.unimi.dsi.fastutil.MainRunner;
public class ByteArraysTest {
private static byte[] castIdentity(int n) {
final byte[] a = new byte[n];
while(n-- != 0) a[n] = (byte)n;
return a;
}
@Test
public void testRadixSort1() {
byte[] t = { 2, 1, 0, 4 };
ByteArrays.radixSort(t);
for(int i = t.length - 1; i-- != 0;) assertTrue(t[i] <= t[i + 1]);
t = new byte[] { 2, (byte)-1, 0, (byte)-4 };
ByteArrays.radixSort(t);
for(int i = t.length - 1; i-- != 0;) assertTrue(t[i] <= t[i + 1]);
t = ByteArrays.shuffle(castIdentity(100), new Random(0));
ByteArrays.radixSort(t);
for(int i = t.length - 1; i-- != 0;) assertTrue(t[i] <= t[i + 1]);
t = new byte[100];
Random random = new Random(0);
for(int i = t.length; i-- != 0;) t[i] = (byte)random.nextInt();
ByteArrays.radixSort(t);
for(int i = t.length - 1; i-- != 0;) assertTrue(t[i] <= t[i + 1]);
t = new byte[100000];
random = new Random(0);
for(int i = t.length; i-- != 0;) t[i] = (byte)random.nextInt();
ByteArrays.radixSort(t);
for(int i = t.length - 1; i-- != 0;) assertTrue(t[i] <= t[i + 1]);
t = new byte[10000000];
random = new Random(0);
for(int i = t.length; i-- != 0;) t[i] = (byte)random.nextInt();
ByteArrays.radixSort(t);
for(int i = t.length - 1; i-- != 0;) assertTrue(t[i] <= t[i + 1]);
}
@Test
public void testRadixSort2() {
final byte[][] d = new byte[2][];
d[0] = new byte[10];
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)(3 - i % 3);
d[1] = ByteArrays.shuffle(castIdentity(10), new Random(0));
ByteArrays.radixSort(d[0], d[1]);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[100000];
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)(100 - i % 100);
d[1] = ByteArrays.shuffle(castIdentity(100000), new Random(6));
ByteArrays.radixSort(d[0], d[1]);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[10];
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)(i % 3 - 2);
Random random = new Random(0);
d[1] = new byte[d[0].length];
for(int i = d.length; i-- != 0;) d[1][i] = (byte)random.nextInt();
ByteArrays.radixSort(d[0], d[1]);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[100000];
random = new Random(0);
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)random.nextInt();
d[1] = new byte[d[0].length];
for(int i = d.length; i-- != 0;) d[1][i] = (byte)random.nextInt();
ByteArrays.radixSort(d[0], d[1]);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[10000000];
random = new Random(0);
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)random.nextInt();
d[1] = new byte[d[0].length];
for(int i = d.length; i-- != 0;) d[1][i] = (byte)random.nextInt();
ByteArrays.radixSort(d[0], d[1]);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
}
@Test
public void testRadixSort() {
final byte[][] t = { { 2, 1, 0, 4 } };
ByteArrays.radixSort(t);
for(int i = t[0].length - 1; i-- != 0;) assertTrue(t[0][i] <= t[0][i + 1]);
t[0] = ByteArrays.shuffle(castIdentity(100), new Random(0));
ByteArrays.radixSort(t);
for(int i = t[0].length - 1; i-- != 0;) assertTrue(t[0][i] <= t[0][i + 1]);
final byte[][] d = new byte[2][];
d[0] = new byte[10];
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)(3 - i % 3);
d[1] = ByteArrays.shuffle(castIdentity(10), new Random(0));
ByteArrays.radixSort(d);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[100000];
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)(100 - i % 100);
d[1] = ByteArrays.shuffle(castIdentity(100000), new Random(6));
ByteArrays.radixSort(d);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[10];
Random random = new Random(0);
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)random.nextInt();
d[1] = new byte[d[0].length];
for(int i = d.length; i-- != 0;) d[1][i] = (byte)random.nextInt();
ByteArrays.radixSort(d);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[100000];
random = new Random(0);
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)random.nextInt();
d[1] = new byte[d[0].length];
for(int i = d.length; i-- != 0;) d[1][i] = (byte)random.nextInt();
ByteArrays.radixSort(d);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
d[0] = new byte[10000000];
random = new Random(0);
for(int i = d[0].length; i-- != 0;) d[0][i] = (byte)random.nextInt();
d[1] = new byte[d[0].length];
for(int i = d.length; i-- != 0;) d[1][i] = (byte)random.nextInt();
ByteArrays.radixSort(d);
for(int i = d[0].length - 1; i-- != 0;) assertTrue(Integer.toString(i) + ": <" + d[0][i] + ", " + d[1][i] + ">, <" + d[0][i + 1] + ", " + d[1][i + 1] + ">", d[0][i] < d[0][i + 1] || d[0][i] == d[0][i + 1] && d[1][i] <= d[1][i + 1]);
}
@Test
public void testLegacyMainMethodTests() throws Exception {
MainRunner.callMainIfExists(ByteArrays.class, "test", /*num=*/"1000", /*seed=*/"848747");
}
}
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