/*

 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * 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).

 *

 * You should have received a copy of the GNU General Public License version

 * 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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package test.sun.invoke.util;

import sun.invoke.util.ValueConversions;

import sun.invoke.util.Wrapper;

import java.lang.invoke.MethodHandles;

import java.lang.invoke.MethodType;

import java.lang.invoke.MethodHandle;

import java.io.Serializable;

import java.util.Arrays;

import org.junit.Test;

import static org.junit.Assert.*;

/* @test

 * @summary unit tests to assert Wrapper zero identities and conversion behave correctly

 * @modules java.base/sun.invoke.util

 * @compile -XDignore.symbol.file WrapperTest.java

 * @run junit test.sun.invoke.util.WrapperTest

 */

public class WrapperTest {

    @Test

    public void testShortZeroConversion() throws Throwable {

        MethodHandle h1 = MethodHandles.constant(Short.class, (short)42);

        MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42

        MethodHandle h3 = h2.asType(MethodType.methodType(short.class));  // add 0

        MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box

        Object x = h4.invokeExact();

        assertEquals(x, (short)0);

        assertTrue(x == Short.valueOf((short)0));

        assertTrue(x == Wrapper.SHORT.zero());

    }

    @Test

    public void testIntZeroConversion() throws Throwable {

        MethodHandle h1 = MethodHandles.constant(Integer.class, 42);

        MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42

        MethodHandle h3 = h2.asType(MethodType.methodType(int.class));  // add 0

        MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box

        Object x = h4.invokeExact();

        assertEquals(x, 0);

        assertTrue(x == Integer.valueOf(0));

        assertTrue(x == Wrapper.INT.zero());

    }

    @Test

    public void testLongZeroConversion() throws Throwable {

        MethodHandle h1 = MethodHandles.constant(Long.class, 42L);

        MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42

        MethodHandle h3 = h2.asType(MethodType.methodType(long.class));  // add 0

        MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box

        Object x = h4.invokeExact();

        assertEquals(x, 0L);

        assertTrue(x == Long.valueOf(0));

        assertTrue(x == Wrapper.LONG.zero());

    }

    @Test

    public void testByteZeroConversion() throws Throwable {

        MethodHandle h1 = MethodHandles.constant(Byte.class, (byte)42);

        MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42

        MethodHandle h3 = h2.asType(MethodType.methodType(byte.class));  // add 0

        MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box

        Object x = h4.invokeExact();

        assertEquals(x, (byte)0);

        assertTrue(x == Byte.valueOf((byte)0));

        assertTrue(x == Wrapper.BYTE.zero());

    }

    @Test

    public void testCharacterZeroConversion() throws Throwable {

        MethodHandle h1 = MethodHandles.constant(Character.class, (char)42);

        MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42

        MethodHandle h3 = h2.asType(MethodType.methodType(char.class));  // add 0

        MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box

        Object x = h4.invokeExact();

        assertEquals(x, (char)0);

        assertTrue(x == Character.valueOf((char)0));

        assertTrue(x == Wrapper.CHAR.zero());

    }

}