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 * 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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/**

 * @test

 * @requires vm.aot

 * @modules jdk.aot/jdk.tools.jaotc.utils

 * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI jdk.tools.jaotc.test.NativeOrderOutputStreamTest

 */

package jdk.tools.jaotc.test;

import jdk.tools.jaotc.utils.NativeOrderOutputStream;

import org.junit.Assert;

import org.junit.Before;

import org.junit.Test;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

public class NativeOrderOutputStreamTest {

    private NativeOrderOutputStream target;

    @Before

    public void setup() {

        target = new NativeOrderOutputStream();

    }

    @Test

    public void shouldAdd4BytesForInt() {

        target.putInt(5);

        Assert.assertEquals(4, target.position());

    }

    @Test

    public void shouldAdd8BytesForLong() {

        target.putLong(8);

        Assert.assertEquals(8, target.position());

    }

    @Test

    public void shouldHaveCorrectSizeBeforePatch() {

        target.patchableInt();

        Assert.assertEquals(4, target.position());

    }

    @Test

    public void shouldHaveCorrectSizeAfterPatch() {

        NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();

        patchableInt.set(12);

        Assert.assertEquals(4, target.position());

    }

    @Test

    public void shouldSetCorrectValueInPatch() {

        NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();

        patchableInt.set(42);

        Assert.assertEquals(42, getInt(0));

    }

    private int getInt(int pos) {

        ByteBuffer buffer = ByteBuffer.wrap(target.array());

        buffer.order(ByteOrder.nativeOrder());

        return buffer.getInt(pos);

    }

    @Test

    public void shouldPutArrayCorrectly() {

        target.put(new byte[]{42, 5, 43, 44});

        Assert.assertEquals(4, target.position());

        Assert.assertEquals(42, target.array()[0]);

        Assert.assertEquals(4, target.position());

    }

    @Test

    public void shouldOnlyPatchSlot() {

        NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();

        target.putInt(7);

        patchableInt.set(39);

        Assert.assertEquals(39, getInt(0));

        Assert.assertEquals(7, getInt(4));

    }

    @Test

    public void shouldBeAbleToPatchAnywhere() {

        target.putInt(19);

        NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();

        patchableInt.set(242);

        Assert.assertEquals(19, getInt(0));

        Assert.assertEquals(242, getInt(4));

    }

    @Test

    public void shouldHavePatchableAtRightOffset() {

        target.putInt(27);

        Assert.assertEquals(4, target.position());

        NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();

        Assert.assertEquals(4, patchableInt.position());

    }

    @Test

    public void shouldAlign() {

        target.putInt(9);

        target.align(16);

        target.put(new byte[]{3});

        target.align(8);

        Assert.assertEquals(24, target.position());

    }

}