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/*
* DSI utilities
*
* Copyright (C) 2010-2023 Sebastiano Vigna
*
* This program and the accompanying materials are made available under the
* terms of the GNU Lesser General Public License v2.1 or later,
* which is available at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1-standalone.html,
* or the Apache Software License 2.0, which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
*
* SPDX-License-Identifier: LGPL-2.1-or-later OR Apache-2.0
*/
package it.unimi.dsi.util;
import static it.unimi.dsi.util.Intervals.EMPTY_INTERVAL;
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.ints.IntIterators;
import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
import it.unimi.dsi.fastutil.ints.IntRBTreeSet;
import it.unimi.dsi.fastutil.ints.IntSortedSet;
import it.unimi.dsi.fastutil.ints.IntSortedSets;
public class IntervalTest {
@Test
public void testLength() {
assertEquals(0, EMPTY_INTERVAL.length());
assertEquals(1, Interval.valueOf(0).length());
assertEquals(2, Interval.valueOf(0, 1).length());
}
@Test
public void testContainsElement() {
assertTrue(Interval.valueOf(0).contains(0));
assertFalse(Interval.valueOf(0).contains(1));
assertFalse(Interval.valueOf(0).contains(-1));
assertTrue(Interval.valueOf(0, 1).contains(0));
assertTrue(Interval.valueOf(0, 1).contains(1));
assertFalse(Interval.valueOf(0).contains(2));
assertFalse(Interval.valueOf(0).contains(-1));
assertFalse(EMPTY_INTERVAL.contains(0));
assertFalse(EMPTY_INTERVAL.contains(1));
assertFalse(EMPTY_INTERVAL.contains(-1));
}
@Test
public void testContainsInterval() {
assertTrue(Interval.valueOf(0).contains(Interval.valueOf(0)));
assertTrue(Interval.valueOf(0).contains(EMPTY_INTERVAL));
assertFalse(Interval.valueOf(0).contains(Interval.valueOf(0, 1)));
assertFalse(Interval.valueOf(0).contains(Interval.valueOf(-1, 0)));
assertTrue(Interval.valueOf(0, 1).contains(Interval.valueOf(0)));
assertTrue(Interval.valueOf(0, 1).contains(Interval.valueOf(1)));
assertTrue(Interval.valueOf(0, 1).contains(Interval.valueOf(0, 1)));
assertTrue(Interval.valueOf(0, 1).contains(EMPTY_INTERVAL));
assertFalse(Interval.valueOf(0).contains(Interval.valueOf(-1, 0)));
assertFalse(Interval.valueOf(0).contains(Interval.valueOf(1, 2)));
assertFalse(Interval.valueOf(0).contains(Interval.valueOf(-1, 2)));
assertTrue(EMPTY_INTERVAL.contains(EMPTY_INTERVAL));
assertFalse(EMPTY_INTERVAL.contains(Interval.valueOf(0)));
assertFalse(EMPTY_INTERVAL.contains(Interval.valueOf(1)));
assertFalse(EMPTY_INTERVAL.contains(Interval.valueOf(0, 1)));
}
@Test
public void testContainsRadius() {
boolean ok = false;
try {
EMPTY_INTERVAL.contains(0, 1);
}
catch(final IllegalArgumentException e) {
ok = true;
}
assertTrue(ok);
assertTrue(Interval.valueOf(0).contains(1, 1));
assertFalse(Interval.valueOf(0).contains(2, 1));
ok = false;
try {
EMPTY_INTERVAL.contains(0, 1, 2);
}
catch(final IllegalArgumentException e) {
ok = true;
}
assertTrue(ok);
assertTrue(Interval.valueOf(0).contains(1, 1, 2));
assertTrue(Interval.valueOf(0).contains(2, 1, 2));
assertFalse(Interval.valueOf(0).contains(3, 1, 2));
}
@Test
public void testCompareInt() {
boolean ok = false;
try {
EMPTY_INTERVAL.compareTo(0);
}
catch(final IllegalArgumentException e) {
ok = true;
}
assertTrue(ok);
assertEquals(-1, Interval.valueOf(0).compareTo(-1));
assertEquals(0, Interval.valueOf(0).compareTo(0));
assertEquals(1, Interval.valueOf(0).compareTo(1));
assertEquals(-1, Interval.valueOf(0, 1).compareTo(-1));
assertEquals(0, Interval.valueOf(0, 1).compareTo(0));
assertEquals(0, Interval.valueOf(0, 1).compareTo(1));
assertEquals(1, Interval.valueOf(0, 1).compareTo(2));
ok = false;
try {
EMPTY_INTERVAL.compareTo(0, 1);
}
catch(final IllegalArgumentException e) {
ok = true;
}
assertTrue(ok);
assertEquals(-1, Interval.valueOf(0).compareTo(-2, 1));
assertEquals(0, Interval.valueOf(0).compareTo(-1, 1));
assertEquals(0, Interval.valueOf(0).compareTo(0, 1));
assertEquals(0, Interval.valueOf(0).compareTo(1, 1));
assertEquals(1, Interval.valueOf(0).compareTo(2, 1));
assertEquals(-1, Interval.valueOf(0, 1).compareTo(-2, 1));
assertEquals(0, Interval.valueOf(0, 1).compareTo(-1, 1));
assertEquals(0, Interval.valueOf(0, 1).compareTo(0, 1));
assertEquals(0, Interval.valueOf(0, 1).compareTo(1, 1));
assertEquals(0, Interval.valueOf(0, 1).compareTo(2, 1));
assertEquals(1, Interval.valueOf(0, 1).compareTo(3, 1));
ok = false;
try {
EMPTY_INTERVAL.compareTo(0, 1, 2);
}
catch(final IllegalArgumentException e) {
ok = true;
}
assertTrue(ok);
assertEquals(-1, Interval.valueOf(0).compareTo(-2, 1, 2));
assertEquals(0, Interval.valueOf(0).compareTo(-1, 1, 2));
assertEquals(0, Interval.valueOf(0).compareTo(0, 1, 2));
assertEquals(0, Interval.valueOf(0).compareTo(1, 1, 2));
assertEquals(0, Interval.valueOf(0).compareTo(2, 1, 2));
assertEquals(1, Interval.valueOf(0).compareTo(3, 1, 2));
assertEquals(-1, Interval.valueOf(0, 1).compareTo(-2, 1, 2));
assertEquals(0, Interval.valueOf(0, 1).compareTo(-1, 1, 2));
assertEquals(0, Interval.valueOf(0, 1).compareTo(0, 1, 2));
assertEquals(0, Interval.valueOf(0, 1).compareTo(1, 1, 2));
assertEquals(0, Interval.valueOf(0, 1).compareTo(2, 1, 2));
assertEquals(0, Interval.valueOf(0, 1).compareTo(3, 1, 2));
assertEquals(1, Interval.valueOf(0, 1).compareTo(4, 1, 2));
}
private IntSortedSet toSortedSet(final Interval interval) {
if (interval == EMPTY_INTERVAL) return IntSortedSets.EMPTY_SET;
final IntSortedSet set = new IntRBTreeSet();
for(int i = interval.left; i <= interval.right; i++) set.add(i);
return set;
}
@Test
public void testSubsets() {
for(int i = 0; i < 10; i++)
for(int j = i - 1; j < 10; j++) {
final Interval interval = j < i ? EMPTY_INTERVAL : Interval.valueOf(i, j);
final IntSortedSet set = toSortedSet(interval);
assertEquals(set, interval);
assertTrue(Arrays.equals(IntIterators.unwrap(set.iterator()), IntIterators.unwrap(interval.iterator())));
assertEquals(new IntOpenHashSet(set), interval);
for(int k = j - 1; k <= i + 1; k++) {
assertTrue(Arrays.equals(IntIterators.unwrap(set.iterator(k)), IntIterators.unwrap(interval.iterator(k))));
assertEquals(set.headSet(k), interval.headSet(k));
assertEquals(set.tailSet(k), interval.tailSet(k));
for(int l = k; l <= i + 1; l++)
assertEquals(set.subSet(k, l), interval.subSet(k, l));
}
}
}
}
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