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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 org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import org.junit.Test;
import it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet;
import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet;
import it.unimi.dsi.fastutil.objects.ObjectSets;
public class ImmutableExternalPrefixMapTest {
public void test(final int blockSize) throws IOException {
final Collection<String> c = Arrays.asList(TernaryIntervalSearchTreeTest.WORDS);
TernaryIntervalSearchTree t = new TernaryIntervalSearchTree(c);
ImmutableExternalPrefixMap d = new ImmutableExternalPrefixMap(c, blockSize);
for (final String element : TernaryIntervalSearchTreeTest.WORDS) assertTrue(element, d.containsKey(element));
for(int i = 0; i < TernaryIntervalSearchTreeTest.WORDS.length; i++) assertEquals(TernaryIntervalSearchTreeTest.WORDS[i], d.list().get(i).toString());
for (final String element : TernaryIntervalSearchTreeTest.WORDS) for(int j = 0; j < element.length(); j++) {
String s = element.substring(0, j + 1);
assertEquals(s, t.rangeMap().get(s), d.getInterval(s));
s = s + " ";
assertEquals(s, t.rangeMap().get(s), d.getInterval(s));
s = s.substring(0, s.length() - 1) + "~";
assertEquals(s, t.rangeMap().get(s), d.getInterval(s));
}
// Similar tests, using all prefixes of all strings in WORDS.
final Collection<String> p = new ObjectRBTreeSet<>();
for (final String element : TernaryIntervalSearchTreeTest.WORDS) for(int j = 0; j < element.length(); j++)
p.add(element.substring(0, j + 1));
d = new ImmutableExternalPrefixMap(p, blockSize);
t = new TernaryIntervalSearchTree(p);
int j = 0;
for (final String s : p) {
assertTrue(s, d.containsKey(s));
assertTrue(s, d.containsKey(s));
assertEquals(s, d.list().get(j++).toString());
assertEquals(s, t.rangeMap().get(s), d.getInterval(s));
}
final Iterator<CharSequence> k = d.iterator();
for(final Iterator<String> i = p.iterator(); i.hasNext();) {
assertTrue(i.hasNext() == k.hasNext());
assertEquals(i.next().toString(), k.next().toString());
}
// Test negatives
for(long i = 1000000000000L; i < 1000000002000L; i++) assertEquals(-1, d.getLong(Long.toBinaryString(i)));
}
@Test
public void test64() throws IOException {
test(64);
}
@Test
public void test128() throws IOException {
test(128);
}
@Test
public void test256() throws IOException {
test(256);
}
@Test
public void test1024() throws IOException {
test(1024);
}
@Test
public void test16384() throws IOException {
test(16384);
}
@Test
public void testPrefixes() throws IOException {
final ImmutableExternalPrefixMap d = new ImmutableExternalPrefixMap(new ObjectLinkedOpenHashSet<CharSequence>(new String[] { "ab", "ba", "bb" }));
assertEquals(Interval.valueOf(1, 2), d.getInterval("b"));
}
@Test
public void testLargeRootPrefixes() throws IOException {
final ImmutableExternalPrefixMap d = new ImmutableExternalPrefixMap(new ObjectLinkedOpenHashSet<CharSequence>(new String[] { "aab", "aac", "aad" }), 2);
assertEquals(Interval.valueOf(0, 2), d.getInterval(""));
assertEquals(Interval.valueOf(0, 2), d.getInterval("aa"));
assertEquals(Interval.valueOf(0, 2), d.getInterval("aa"));
}
@Test
public void testSingleton() throws IOException {
final ImmutableExternalPrefixMap d = new ImmutableExternalPrefixMap(ObjectSets.singleton("a"), 1024);
assertTrue(d.containsKey("a"));
assertFalse(d.containsKey("b"));
assertFalse(d.containsKey("0"));
}
@Test
public void testPrefixOutOfRange() throws IOException {
final ImmutableExternalPrefixMap d = new ImmutableExternalPrefixMap(new ObjectLinkedOpenHashSet<CharSequence>(new String[] { "ab", "ac" }));
assertEquals(Intervals.EMPTY_INTERVAL, d.getInterval("b"));
assertEquals(Interval.valueOf(0, 1), d.getInterval("a"));
}
}
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