hotspot/test/compiler/jvmci/jdk.vm.ci.runtime.test/src/jdk/vm/ci/runtime/test/ConstantTest.java

/*
 * Copyright (c) 2014, 2016, 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
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 * 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).
 *
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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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/**
 * @test
 * @requires vm.jvmci
 * @library ../../../../../
 * @modules jdk.internal.vm.ci/jdk.vm.ci.meta
 *          jdk.internal.vm.ci/jdk.vm.ci.runtime
 *          java.base/jdk.internal.misc
 * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI -Djvmci.Compiler=null jdk.vm.ci.runtime.test.ConstantTest
 */
package jdk.vm.ci.runtime.test;

import jdk.vm.ci.meta.JavaConstant;
import org.junit.Assert;
import org.junit.Test;

public class ConstantTest extends FieldUniverse {

    @Test
    public void testNegativeZero() {
        Assert.assertTrue("Constant for 0.0f must be different from -0.0f", JavaConstant.FLOAT_0 != JavaConstant.forFloat(-0.0F));
        Assert.assertTrue("Constant for 0.0d must be different from -0.0d", JavaConstant.DOUBLE_0 != JavaConstant.forDouble(-0.0d));
    }

    @Test
    public void testNullIsNull() {
        Assert.assertTrue(JavaConstant.NULL_POINTER.isNull());
    }
}