src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/UnsignedLongTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * 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 org.graalvm.compiler.core.test;

import org.graalvm.compiler.core.common.util.UnsignedLong;
import org.junit.Assert;
import org.junit.Test;

public class UnsignedLongTest {
    @Test
    public void testEquals() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertTrue(fortyTwo.equals(42));
        Assert.assertFalse(fortyTwo.equals(99));
        UnsignedLong longFortyTwo = new UnsignedLong(0x42_0000_8888L);
        Assert.assertTrue(longFortyTwo.equals(0x42_0000_8888L));
        Assert.assertFalse(longFortyTwo.equals(0x99_0000_8888L));
        UnsignedLong longUnsigned = new UnsignedLong(0x8000_7777_0000_8888L);
        Assert.assertTrue(longUnsigned.equals(0x8000_7777_0000_8888L));
        Assert.assertFalse(longUnsigned.equals(0xf000_7777_0000_8888L));
    }

    @Test
    public void testIsLessThan() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertTrue(fortyTwo.isLessThan(45));
        Assert.assertFalse(fortyTwo.isLessThan(42));
        Assert.assertFalse(fortyTwo.isLessThan(40));
        Assert.assertTrue(fortyTwo.isLessThan(0xffff_ffff_ffff_ffffL));
        UnsignedLong longUnsigned = new UnsignedLong(0x8000_7777_0000_8888L);
        Assert.assertTrue(longUnsigned.isLessThan(0xffff_ffff_ffff_ffffL));
        Assert.assertFalse(longUnsigned.isLessThan(42));
        Assert.assertFalse(longUnsigned.isLessThan(0x8000_0777_0000_8888L));
        Assert.assertFalse(longUnsigned.isLessThan(0x8000_7777_0000_8888L));
    }

    @Test
    public void testIsLessOrEqualTo() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertTrue(fortyTwo.isLessOrEqualTo(45));
        Assert.assertTrue(fortyTwo.isLessOrEqualTo(42));
        Assert.assertFalse(fortyTwo.isLessOrEqualTo(40));
        Assert.assertTrue(fortyTwo.isLessOrEqualTo(0xffff_ffff_ffff_ffffL));
        UnsignedLong longUnsigned = new UnsignedLong(0x8000_7777_0000_8888L);
        Assert.assertTrue(longUnsigned.isLessOrEqualTo(0xffff_ffff_ffff_ffffL));
        Assert.assertFalse(longUnsigned.isLessOrEqualTo(42));
        Assert.assertFalse(longUnsigned.isLessOrEqualTo(0x8000_0777_0000_8888L));
        Assert.assertTrue(longUnsigned.isLessOrEqualTo(0x8000_7777_0000_8888L));
    }

    @Test
    public void testTimes() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertEquals(42 * 42, fortyTwo.times(42).asLong());
        Assert.assertEquals(0xffff_ffff_ffff_fff0L, fortyTwo.times(0x618618618618618L).asLong());
    }

    @Test(expected = ArithmeticException.class)
    public void testTimesException() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        fortyTwo.times(0x618618618618619L);
    }

    @Test
    public void testMinus() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertEquals(0, fortyTwo.minus(42).asLong());
        Assert.assertEquals(40, fortyTwo.minus(2).asLong());
        UnsignedLong longUnsigned = new UnsignedLong(0xffff_ffff_ffff_fff0L);
        Assert.assertEquals(0, longUnsigned.minus(0xffff_ffff_ffff_fff0L).asLong());
    }

    @Test(expected = ArithmeticException.class)
    public void testMinusException() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        fortyTwo.minus(43);
    }

    @Test(expected = ArithmeticException.class)
    public void testMinusException2() {
        UnsignedLong longUnsigned = new UnsignedLong(0xffff_ffff_ffff_fff0L);
        longUnsigned.minus(0xffff_ffff_ffff_fff1L);
    }

    @Test
    public void testPlus() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertEquals(84, fortyTwo.plus(42).asLong());
        Assert.assertEquals(44, fortyTwo.plus(2).asLong());
        UnsignedLong longUnsigned = new UnsignedLong(0xffff_ffff_ffff_fff0L);
        Assert.assertEquals(0xffff_ffff_ffff_ffffL, longUnsigned.plus(0xf).asLong());
    }

    @Test(expected = ArithmeticException.class)
    public void testPlusException() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        fortyTwo.plus(0xffff_ffff_ffff_fff0L);
    }

    @Test(expected = ArithmeticException.class)
    public void testPlusException2() {
        UnsignedLong longUnsigned = new UnsignedLong(0xffff_ffff_ffff_fff0L);
        longUnsigned.plus(42);
    }

    @Test
    public void testWrappingTimes() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertEquals(0x1a, fortyTwo.wrappingTimes(0x618618618618619L).asLong());
    }

    @Test
    public void testWrappingPlus() {
        UnsignedLong fortyTwo = new UnsignedLong(42);
        Assert.assertEquals(0x1a, fortyTwo.wrappingPlus(0xffff_ffff_ffff_fff0L).asLong());
        UnsignedLong longUnsigned = new UnsignedLong(0xffff_ffff_ffff_fff0L);
        Assert.assertEquals(0x1a, longUnsigned.wrappingPlus(42).asLong());
    }
}