test.it.unimi.dsi.bits.LongArrayBitVectorTest Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of dsiutils Show documentation
The DSI utilities are a mishmash of classes accumulated during the last twenty years in projects developed at the DSI (Dipartimento di Scienze dell'Informazione, i.e., Information Sciences Department), now DI (Dipartimento di Informatica, i.e., Informatics Department), of the Universita` degli Studi di Milano.
There is a newer version: 2.7.3
Show newest version
package it.unimi.dsi.bits;

/*
 * DSI utilities
 *
 * Copyright (C) 2010-2018 Sebastiano Vigna
 *
 *  This library is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU Lesser General Public License as published by the Free
 *  Software Foundation; either version 3 of the License, or (at your option)
 *  any later version.
 *
 *  This library 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.  See the GNU Lesser General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, see .
 *
 */

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import it.unimi.dsi.fastutil.longs.LongBigList;
import it.unimi.dsi.util.SplitMix64Random;

import java.io.IOException;
import java.util.Random;

import org.junit.Test;

public class LongArrayBitVectorTest {

	@Test
	public void testSetClearFlip() {
		LongArrayBitVector v = LongArrayBitVector.getInstance();
		v.size(1);
		BitVectorTestCase.testSetClearFlip(v);
		v.size(64);
		BitVectorTestCase.testSetClearFlip(v);
		v.size(80);
		BitVectorTestCase.testSetClearFlip(v);
		v.size(150);
		BitVectorTestCase.testSetClearFlip(v);

		BitVectorTestCase.testSetClearFlip(v.subVector(0, 90));
		BitVectorTestCase.testSetClearFlip(v.subVector(5, 90));
	}

	@Test
	public void testFillFlip() {
		LongArrayBitVector v = LongArrayBitVector.getInstance();
		v.size(100);
		BitVectorTestCase.testFillFlip(v);
		BitVectorTestCase.testFillFlip(v.subVector(0, 90));
		BitVectorTestCase.testFillFlip(v.subVector(5, 90));
	}

	@Test
	public void testRemove() {
		BitVectorTestCase.testRemove(LongArrayBitVector.getInstance());
		LongArrayBitVector v = LongArrayBitVector.getInstance();

		v.clear();
		v.size(65);
		v.set(64);
		v.removeBoolean(0);
		assertEquals(0, v.bits()[1]);
		v.clear();
	}

	@Test
	public void testAdd() {
		BitVectorTestCase.testAdd(LongArrayBitVector.getInstance());
	}

	@Test
	public void testCopy() {
		BitVectorTestCase.testCopy(LongArrayBitVector.getInstance());
	}

	@Test
	public void testEquals2() {
		LongArrayBitVector v = LongArrayBitVector.getInstance();
		v.clear();
		v.size(100);
		v.fill(5, 80, true);
		LongArrayBitVector w = v.copy();
		assertTrue(w.equals(v, 0, 100));
		assertTrue(w.equals(v, 0, 64));
		assertTrue(w.equals(v, 64, 100));

		v.clear();
		v.size(1000);
		v.fill(5, 800, true);
		w.replace(v);
		assertTrue(w.equals(v, 0, 1000));
		assertTrue(w.equals(v, 0, 64));
		assertTrue(w.equals(v, 0, 500));
		assertTrue(w.equals(v, 128, 900));

		v.clear();
		v.size(100);
		v.fill(5, 80, true);
		w = v.copy();
		w.clear(30);
		w.clear(70);
		w.set(90);
		assertFalse(w.equals(v, 0, 100));
		assertFalse(w.equals(v, 0, 64));
		assertFalse(w.equals(v, 64, 100));
		assertFalse(w.equals(v, 65, 100));

		v.clear();
		v.size(1000);
		v.fill(5, 800, true);
		w.replace(v);
		w.clear(63);
		w.clear(128);
		w.clear(500);
		assertFalse(w.equals(v, 0, 1000));
		assertFalse(w.equals(v, 0, 64));
		assertFalse(w.equals(v, 0, 500));
		assertFalse(w.equals(v, 128, 900));
		assertFalse(w.equals(v, 129, 900));
		assertFalse(w.equals(v, 129, 511));
}

	@Test
	public void testBits() {
		BitVectorTestCase.testBits(LongArrayBitVector.getInstance());
	}

	@Test
	public void testLongBigListView() {
		BitVectorTestCase.testLongBigListView(LongArrayBitVector.getInstance());
	}

	@Test
	public void testLongSetView() {
		BitVectorTestCase.testLongSetView(LongArrayBitVector.getInstance());
	}

	@Test
	public void testFirstLastPrefix() {
		BitVectorTestCase.testFirstLastPrefix(LongArrayBitVector.getInstance());
	}

	@Test
	public void testLogicOperators() {
		BitVectorTestCase.testLogicOperators(LongArrayBitVector.getInstance());
	}

	@Test
	public void testCount() {
		BitVectorTestCase.testCount(LongArrayBitVector.getInstance());
	}

	@Test
	public void testSerialisation() throws IOException, ClassNotFoundException {
		BitVectorTestCase.testSerialisation(LongArrayBitVector.getInstance());
	}

	@Test
	public void testReplace() {
		BitVectorTestCase.testReplace(LongArrayBitVector.getInstance());
	}

	@Test
	public void testGarbageInReplace() {
		LongArrayBitVector b = LongArrayBitVector.ofLength(128);
		b.set(64);
		b.replace(BooleanListBitVector.getInstance().length(64));
		assertEquals(0, b.bits()[1]);
	}

	@Test
	public void testHashCodeConsistency() {
		LongArrayBitVector b = LongArrayBitVector.of(0, 1, 1, 0, 0, 1);
		assertEquals(BooleanListBitVector.getInstance().replace(b).hashCode(), b.hashCode());
		b = LongArrayBitVector.wrap(new long[]{ 0x234598729872983L, 0x234598729872983L, 0x234598729872983L, 0xFFFF }, 222);
		assertEquals(BooleanListBitVector.getInstance().replace(b).hashCode(), b.hashCode());
		assertEquals(BitVectors.EMPTY_VECTOR.hashCode(), b.length(0).hashCode());
	}

	@Test
	public void testAppend() {
		BitVectorTestCase.testAppend(LongArrayBitVector.getInstance());
	}

	@Test
	public void testTrim() {
		assertTrue(LongArrayBitVector.getInstance(100).trim());
		assertFalse(LongArrayBitVector.getInstance(100).length(65).trim());
		assertFalse(LongArrayBitVector.getInstance(0).trim());
	}

	@Test
	public void testClone() throws CloneNotSupportedException {
		LongArrayBitVector v = LongArrayBitVector.getInstance().length(100);
		for(int i = 0; i < 50; i++) v.set(i * 2);
		assertEquals(v, v.clone());
	}

	@Test
	public void testEquals() {
		LongArrayBitVector v = LongArrayBitVector.getInstance().length(100);
		for(int i = 0; i < 50; i++) v.set(i * 2);
		LongArrayBitVector w = v.copy();
		assertEquals(v, w);
		w.length(101);
		assertFalse(v.equals(w));
		w.length(100);
		w.set(3);
		assertFalse(v.equals(w));
	}

	@Test
	public void testConstructor() {
		final long bits[] = { 0, 1, 0 };

		boolean ok = false;
		try {
			LongArrayBitVector.wrap(bits, 64);
		}
		catch(IllegalArgumentException e) {
			ok = true;
		}

		assertTrue(ok);

		LongArrayBitVector.wrap(bits, 65);
		LongArrayBitVector.wrap(bits, 128);

		ok = false;
		try {
			LongArrayBitVector.wrap(bits, 193);
		}
		catch(IllegalArgumentException e) {
			ok = true;
		}

		assertTrue(ok);

		bits[0] = 10;
		bits[1] = 0;

		ok = false;
		try {
			LongArrayBitVector.wrap(bits, 3);
		}
		catch(IllegalArgumentException e) {
			ok = true;
		}

		assertTrue(ok);

		LongArrayBitVector.wrap(bits, 4);

		bits[2] = 1;

		ok = false;
		try {
			LongArrayBitVector.wrap(bits, 4);
		}
		catch(IllegalArgumentException e) {
			ok = true;
		}

		assertTrue(ok);

	}

	@Test
	public void testLongBig() {
		LongArrayBitVector v =  LongArrayBitVector.getInstance(16 * 1024);
		LongBigList l = v.asLongBigList(Short.SIZE);
		l.set(0, 511);
		assertEquals(511, v.bits()[0]);
	}

	@Test
	public void testCopyAnotherVector() {
		Random r = new SplitMix64Random(1);
		LongArrayBitVector bv = LongArrayBitVector.getInstance(200);
		for(int i = 0; i < 100; i++) bv.add(r.nextBoolean());
		assertEquals(LongArrayBitVector.copy(bv), bv);
		bv = LongArrayBitVector.getInstance(256);
		for(int i = 0; i < 256; i++) bv.add(r.nextBoolean());
		assertEquals(LongArrayBitVector.copy(bv), bv);
		bv = LongArrayBitVector.getInstance(10);
		for(int i = 0; i < 10; i++) bv.add(r.nextBoolean());
		assertEquals(LongArrayBitVector.copy(bv), bv);
		BooleanListBitVector bbv = BooleanListBitVector.getInstance(200);
		for(int i = 0; i < 100; i++) bbv.add(r.nextBoolean());
		assertEquals(LongArrayBitVector.copy(bbv), bbv);
		bbv = BooleanListBitVector.getInstance(256);
		for(int i = 0; i < 256; i++) bbv.add(r.nextBoolean());
		assertEquals(LongArrayBitVector.copy(bbv), bbv);
		bbv = BooleanListBitVector.getInstance(10);
		for(int i = 0; i < 10; i++) bbv.add(r.nextBoolean());
		assertEquals(LongArrayBitVector.copy(bbv), bbv);
	}

	@Test
	public void testReplaceLongArrayBitVector() {
		LongArrayBitVector b = LongArrayBitVector.of(0, 1, 1);
		assertEquals(b, LongArrayBitVector.getInstance().replace(b));
	}

	@Test
	public void testLengthClearsBits() {
		LongArrayBitVector bv = LongArrayBitVector.getInstance().length(100);
		bv.fill(true);
		bv.length(0);
		bv.append(0, 1);
		assertFalse(bv.getBoolean(0));
	}
}