TestSymbolLookup.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64"
 * @modules jdk.incubator.foreign/jdk.internal.foreign
 * @run testng/othervm --enable-native-access=ALL-UNNAMED TestSymbolLookup
 */

import jdk.incubator.foreign.SymbolLookup;
import jdk.incubator.foreign.MemoryAccess;
import jdk.incubator.foreign.MemoryLayouts;
import jdk.incubator.foreign.MemorySegment;
import jdk.incubator.foreign.ResourceScope;
import org.testng.annotations.Test;

import static org.testng.Assert.*;

// FYI this test is run on 64-bit platforms only for now,
// since the windows 32-bit linker fails and there
// is some fallback behaviour to use the 64-bit linker,
// where cygwin gets in the way and we accidentally pick up its
// link.exe
public class TestSymbolLookup {
    static {
        System.loadLibrary("LookupTest");
    }

    static final SymbolLookup LOOKUP = SymbolLookup.loaderLookup();

    @Test
    public void testSimpleLookup() {
        assertFalse(LOOKUP.lookup("f").isEmpty());
    }

    @Test
    public void testInvalidSymbolLookup() {
        assertTrue(LOOKUP.lookup("nonExistent").isEmpty());
    }

    @Test
    public void testVariableSymbolLookup() {
        MemorySegment segment = LOOKUP.lookup("c").get().asSegment(MemoryLayouts.JAVA_INT.byteSize(), ResourceScope.globalScope());
        assertEquals(MemoryAccess.getInt(segment), 42);
    }
}