LateBindNFITest.java

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package com.oracle.truffle.nfi.test;

import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.ForeignAccess;
import com.oracle.truffle.api.interop.InteropException;
import com.oracle.truffle.api.interop.Message;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.tck.TruffleRunner;
import com.oracle.truffle.tck.TruffleRunner.Inject;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.CoreMatchers.is;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(TruffleRunner.class)
public class LateBindNFITest extends NFITest {

    public static class BindAndExecuteNode extends NFITestRootNode {

        @Child Node bind = Message.createInvoke(1).createNode();
        @Child Node execute = Message.createExecute(1).createNode();

        @Override
        public Object executeTest(VirtualFrame frame) throws InteropException {
            TruffleObject symbol = (TruffleObject) frame.getArguments()[0];
            TruffleObject bound = (TruffleObject) ForeignAccess.sendInvoke(bind, symbol, "bind", "(sint32):sint32");
            return ForeignAccess.sendExecute(execute, bound, frame.getArguments()[1]);
        }
    }

    @Test
    public void testLateBind(@Inject(BindAndExecuteNode.class) CallTarget callTarget) {
        TruffleObject increment;
        try {
            increment = (TruffleObject) ForeignAccess.sendRead(Message.READ.createNode(), testLibrary, "increment_SINT32");
        } catch (InteropException e) {
            throw new AssertionError(e);
        }

        Object ret = callTarget.call(increment, 41);

        Assert.assertThat("return value", ret, is(instanceOf(Integer.class)));
        Assert.assertEquals("return value", 42, (int) (Integer) ret);
    }
}