1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @requires os.family == "linux" & vm.bits == "64" & os.arch == "amd64"
  27  * @modules jdk.aot/jdk.tools.jaotc.utils
  28  * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI jdk.tools.jaotc.test.NativeOrderOutputStreamTest
  29  */
  30 
  31 package jdk.tools.jaotc.test;
  32 
  33 import jdk.tools.jaotc.utils.NativeOrderOutputStream;
  34 import org.junit.Assert;
  35 import org.junit.Before;
  36 import org.junit.Test;
  37 
  38 import java.nio.ByteBuffer;
  39 import java.nio.ByteOrder;
  40 
  41 public class NativeOrderOutputStreamTest {
  42 
  43     private NativeOrderOutputStream target;
  44 
  45     @Before
  46     public void setup() {
  47         target = new NativeOrderOutputStream();
  48     }
  49 
  50     @Test
  51     public void shouldAdd4BytesForInt() {
  52         target.putInt(5);
  53         Assert.assertEquals(4, target.position());
  54     }
  55 
  56     @Test
  57     public void shouldAdd8BytesForLong() {
  58         target.putLong(8);
  59         Assert.assertEquals(8, target.position());
  60     }
  61 
  62     @Test
  63     public void shouldHaveCorrectSizeBeforePatch() {
  64         target.patchableInt();
  65         Assert.assertEquals(4, target.position());
  66     }
  67 
  68     @Test
  69     public void shouldHaveCorrectSizeAfterPatch() {
  70         NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();
  71         patchableInt.set(12);
  72         Assert.assertEquals(4, target.position());
  73     }
  74 
  75     @Test
  76     public void shouldSetCorrectValueInPatch() {
  77         NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();
  78         patchableInt.set(42);
  79         Assert.assertEquals(42, getInt(0));
  80     }
  81 
  82     private int getInt(int pos) {
  83         ByteBuffer buffer = ByteBuffer.wrap(target.array());
  84         buffer.order(ByteOrder.nativeOrder());
  85         return buffer.getInt(pos);
  86     }
  87 
  88     @Test
  89     public void shouldPutArrayCorrectly() {
  90         target.put(new byte[]{42, 5, 43, 44});
  91         Assert.assertEquals(4, target.position());
  92         Assert.assertEquals(42, target.array()[0]);
  93         Assert.assertEquals(4, target.position());
  94     }
  95 
  96     @Test
  97     public void shouldOnlyPatchSlot() {
  98         NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();
  99         target.putInt(7);
 100         patchableInt.set(39);
 101         Assert.assertEquals(39, getInt(0));
 102         Assert.assertEquals(7, getInt(4));
 103     }
 104 
 105     @Test
 106     public void shouldBeAbleToPatchAnywhere() {
 107         target.putInt(19);
 108         NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();
 109         patchableInt.set(242);
 110 
 111         Assert.assertEquals(19, getInt(0));
 112         Assert.assertEquals(242, getInt(4));
 113     }
 114 
 115     @Test
 116     public void shouldHavePatchableAtRightOffset() {
 117         target.putInt(27);
 118         Assert.assertEquals(4, target.position());
 119         NativeOrderOutputStream.PatchableInt patchableInt = target.patchableInt();
 120         Assert.assertEquals(4, patchableInt.position());
 121     }
 122 
 123     @Test
 124     public void shouldAlign() {
 125         target.putInt(9);
 126         target.align(16);
 127         target.put(new byte[]{3});
 128         target.align(8);
 129         Assert.assertEquals(24, target.position());
 130     }
 131 }