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

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package it.unimi.dsi.bits;

/*
 * DSI utilities
 *
 * Copyright (C) 2010-2017 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.assertFalse;
import static org.junit.Assert.assertTrue;

import org.junit.Test;

public class FixedLongTransformationStrategyTest {

	@Test
	public void testGetBoolean() {
		final TransformationStrategy fixedLong = TransformationStrategies.fixedLong();
		BitVector p = fixedLong.toBitVector(Long.valueOf(0));
		for(int i = Long.SIZE; i-- != 0;) assertFalse(p.getBoolean(i));
		p = fixedLong.toBitVector(Long.valueOf(0xDEADBEEFDEADF00DL));
		for(int i = Long.SIZE; i-- != 0;) assertTrue(p.getBoolean(i) == ((0xDEADBEEFDEADF00DL & 1L << Long.SIZE - 1 - i) != 0));
	}

	@Test
	public void testGetLong() {
		final TransformationStrategy fixedLong = TransformationStrategies.fixedLong();
		BitVector p = fixedLong.toBitVector(Long.valueOf(Long.reverse(0xDEADBEEFDEADF00DL)));
		for(int from = Long.SIZE; from-- != 0;)
			for(int to = Long.SIZE; from < to--;)
				assertTrue(p.getLong(from, to) == LongArrayBitVector.wrap(new long[] { 0xDEADBEEFDEADF00DL }).getLong(from, to));
	}

}