/*
* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
package test.com.sun.max.lang;
import com.sun.max.ide.*;
import com.sun.max.lang.*;
/**
* Tests for {@link Longs}.
*/
public class LongsTest extends MaxTestCase {
public LongsTest(String name) {
super(name);
}
public static void main(String[] args) {
junit.textui.TestRunner.run(LongsTest.class);
}
public void test_numberOfEffectiveUnsignedBits() {
assertTrue(Longs.numberOfEffectiveUnsignedBits(0L) == 0);
assertTrue(Longs.numberOfEffectiveUnsignedBits(1L) == 1);
assertTrue(Longs.numberOfEffectiveUnsignedBits(2L) == 2);
assertTrue(Longs.numberOfEffectiveUnsignedBits(3L) == 2);
assertTrue(Longs.numberOfEffectiveUnsignedBits(4L) == 3);
assertTrue(Longs.numberOfEffectiveUnsignedBits(126L) == 7);
assertTrue(Longs.numberOfEffectiveUnsignedBits(127L) == 7);
assertTrue(Longs.numberOfEffectiveUnsignedBits(129L) == 8);
assertTrue(Longs.numberOfEffectiveUnsignedBits(254L) == 8);
assertTrue(Longs.numberOfEffectiveUnsignedBits(255L) == 8);
assertTrue(Longs.numberOfEffectiveUnsignedBits(256L) == 9);
assertTrue(Longs.numberOfEffectiveUnsignedBits(257L) == 9);
}
public void test_numberOfEffectiveSignedBits() {
for (long i = 0; i < 257L; i++) {
assertTrue(Longs.numberOfEffectiveSignedBits(i) == Longs.numberOfEffectiveUnsignedBits(i) + 1L);
}
assertTrue(Longs.numberOfEffectiveSignedBits(0L) == 1);
assertTrue(Longs.numberOfEffectiveSignedBits(-1L) == 1);
assertTrue(Longs.numberOfEffectiveSignedBits(-2L) == 2);
assertTrue(Longs.numberOfEffectiveSignedBits(-3L) == 3);
assertTrue(Longs.numberOfEffectiveSignedBits(-4L) == 3);
assertTrue(Longs.numberOfEffectiveSignedBits(-5L) == 4);
assertTrue(Longs.numberOfEffectiveSignedBits(-6L) == 4);
assertTrue(Longs.numberOfEffectiveSignedBits(-7L) == 4);
assertTrue(Longs.numberOfEffectiveSignedBits(-8L) == 4);
assertTrue(Longs.numberOfEffectiveSignedBits(-9L) == 5);
assertTrue(Longs.numberOfEffectiveSignedBits(-126L) == 8);
assertTrue(Longs.numberOfEffectiveSignedBits(-127L) == 8);
assertTrue(Longs.numberOfEffectiveSignedBits(-128L) == 8);
assertTrue(Longs.numberOfEffectiveSignedBits(-129L) == 9);
assertTrue(Longs.numberOfEffectiveSignedBits(-254L) == 9);
assertTrue(Longs.numberOfEffectiveSignedBits(-255L) == 9);
assertTrue(Longs.numberOfEffectiveSignedBits(-256L) == 9);
assertTrue(Longs.numberOfEffectiveSignedBits(-257L) == 10);
}
}