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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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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
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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
 * @enablePreview
 * @modules java.base/jdk.internal.foreign
 * @run testng TestLayoutEquality
 */

import java.lang.foreign.MemoryLayout;
import java.lang.foreign.ValueLayout;
import jdk.internal.foreign.PlatformLayouts;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import static org.testng.Assert.*;

public class TestLayoutEquality {

    @Test(dataProvider = "layoutConstants")
    public void testReconstructedEquality(ValueLayout layout) {
        ValueLayout newLayout = MemoryLayout.valueLayout(layout.carrier(), layout.order());
        newLayout = newLayout.withBitAlignment(layout.bitAlignment());
        if (layout instanceof ValueLayout.OfAddress addressLayout && addressLayout.isUnbounded()) {
            newLayout = ((ValueLayout.OfAddress)newLayout).asUnbounded();
        }

        // properties should be equal
        assertEquals(newLayout.bitSize(), layout.bitSize());
        assertEquals(newLayout.bitAlignment(), layout.bitAlignment());
        assertEquals(newLayout.name(), layout.name());

        // layouts should be equals
        assertEquals(newLayout, layout);
    }

    @DataProvider
    public static Object[][] layoutConstants() throws ReflectiveOperationException {
        List<ValueLayout> testValues = new ArrayList<>();

        addLayoutConstants(testValues, PlatformLayouts.SysV.class);
        addLayoutConstants(testValues, PlatformLayouts.Win64.class);
        addLayoutConstants(testValues, PlatformLayouts.AArch64.class);
        addLayoutConstants(testValues, PlatformLayouts.RISCV64.class);

        return testValues.stream().map(e -> new Object[]{ e }).toArray(Object[][]::new);
    }

    private static void addLayoutConstants(List<ValueLayout> testValues, Class<?> cls) throws ReflectiveOperationException {
        for (Field f : cls.getFields()) {
            if (f.getName().startsWith("C_"))
                testValues.add((ValueLayout) f.get(null));
        }
    }
}