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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.objects;
import static it.unimi.dsi.fastutil.BigArrays.copy;
import static it.unimi.dsi.fastutil.BigArrays.get;
import static it.unimi.dsi.fastutil.BigArrays.length;
import static it.unimi.dsi.fastutil.BigArrays.set;
import static it.unimi.dsi.fastutil.BigArrays.trim;
import static it.unimi.dsi.fastutil.BigArrays.wrap;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.util.Arrays;
import org.junit.Test;
import it.unimi.dsi.fastutil.BigArrays;
import it.unimi.dsi.fastutil.MainRunner;
public class ObjectBigArraysTest {
@SuppressWarnings({ "unchecked", "boxing" })
@Test
public void testquickSort() {
final Integer[] s = new Integer[] { 2, 1, 5, 2, 1, 0, 9, 1, 4, 2, 4, 6, 8, 9, 10, 12, 1, 7 };
Arrays.sort(s);
final Integer[][] sorted = wrap(s.clone());
Integer[][] a = wrap(s.clone());
ObjectBigArrays.quickSort(a);
assertArrayEquals(sorted, a);
ObjectBigArrays.quickSort(a);
assertArrayEquals(sorted, a);
a = wrap(s.clone());
ObjectBigArrays.quickSort(a, ObjectComparators.NATURAL_COMPARATOR);
assertArrayEquals(sorted, a);
ObjectBigArrays.quickSort(a, ObjectComparators.NATURAL_COMPARATOR);
assertArrayEquals(sorted, a);
}
@SuppressWarnings("boxing")
private void testCopy(final int n) {
final Object[][] a = ObjectBigArrays.newBigArray(n);
for (int i = 0; i < n; i++) set(a, i, i);
copy(a, 0, a, 1, n - 2);
assertEquals(0, a[0][0]);
for (int i = 0; i < n - 2; i++) assertEquals(i, get(a, i + 1));
for (int i = 0; i < n; i++) set(a, i, i);
copy(a, 1, a, 0, n - 1);
for (int i = 0; i < n - 1; i++) assertEquals(i + 1, get(a, i));
for (int i = 0; i < n; i++) set(a, i, i);
final Integer[] b = new Integer[n];
for (int i = 0; i < n; i++) b[i] = i;
assertArrayEquals(a, wrap(b));
}
@Test
public void testCopy10() {
testCopy(10);
}
@Test
public void testCopy1000() {
testCopy(1000);
}
@Test
public void testCopy1000000() {
testCopy(1000000);
}
@SuppressWarnings({ "boxing", "unchecked" })
@Test
public void testBinarySearch() {
final Integer[] a = new Integer[] { 25, 32, 1, 3, 2, 0, 40, 7, 13, 12, 11, 10, -1, -6, -18, 2000 };
Arrays.sort(a);
final Integer[][] b = wrap(a.clone());
for(int i = -1; i < 20; i++) {
assertEquals(String.valueOf(i), Arrays.binarySearch(a, i), ObjectBigArrays.binarySearch(b, i));
assertEquals(String.valueOf(i), Arrays.binarySearch(a, i), ObjectBigArrays.binarySearch(b, i, ObjectComparators.NATURAL_COMPARATOR));
}
for(int i = -1; i < 20; i++) {
assertEquals(Arrays.binarySearch(a, 5, 13, i), ObjectBigArrays.binarySearch(b, 5, 13, i));
assertEquals(Arrays.binarySearch(a, 5, 13, i), ObjectBigArrays.binarySearch(b, 5, 13, i, ObjectComparators.NATURAL_COMPARATOR));
}
}
@SuppressWarnings("boxing")
@Test
public void testTrim() {
final Integer[] a = new Integer[] { 2, 1, 5, 2, 1, 0, 9, 1, 4, 2, 4, 6, 8, 9, 10, 12, 1, 7 };
final Integer[][] b = wrap(a.clone());
for(int i = a.length; i-- != 0;) {
final Integer[][] t = trim(b, i);
final long l = length(t);
assertEquals(i, l);
for(int p = 0; p < l; p++) assertEquals(a[p], get(t, p));
}
}
@SuppressWarnings("boxing")
@Test
public void testEquals() {
final Integer[] a = new Integer[] { 2, 1, 5, 2, 1, 0, 9, 1, 4, 2, 4, 6, 8, 9, 10, 12, 1, 7 };
final Integer[][] b = wrap(a.clone());
final Integer[][] c = wrap(a.clone());
assertTrue(BigArrays.equals(b, c));
b[0][0] = 0;
assertFalse(BigArrays.equals(b, c));
}
@Test
public void testLegacyMainMethodTests() throws Exception {
MainRunner.callMainIfExists(ObjectBigArrays.class, "test", /*num=*/"10000", /*seed=*/"293843");
}
}
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