NegatedGuardsTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
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package com.oracle.truffle.api.dsl.test;

import static com.oracle.truffle.api.dsl.test.TestHelper.createRoot;
import static com.oracle.truffle.api.dsl.test.TestHelper.executeWith;

import org.junit.Assert;
import org.junit.Test;

import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.dsl.test.NegatedGuardsTestFactory.NegatedGuardNodeFactory;
import com.oracle.truffle.api.dsl.test.TypeSystemTest.TestRootNode;
import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;

public class NegatedGuardsTest {

    @Test
    public void testGuardGlobal() {
        TestRootNode<NegatedGuardNode> root = createRoot(NegatedGuardNodeFactory.getInstance());
        Assert.assertEquals(42, executeWith(root));
    }

    abstract static class NegatedGuardNode extends ValueNode {

        static boolean guard() {
            return true;
        }

        @Specialization(guards = "!guard()")
        int do1() {
            throw new AssertionError();
        }

        @Specialization
        int do2() {
            return 42; // the generic answer to all questions
        }
    }
}