From b3ac7c49fcdb3a13f8d002a7140f8ff2c67d67fb Mon Sep 17 00:00:00 2001
From: Volker Berlin <volker.berlin@googlemail.com>
Date: Sun, 20 Oct 2019 14:14:50 +0200
Subject: [PATCH] tests for System.arraycopy

---
 .../jwebassembly/runtime/ArrayOperations.java | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java b/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java
index 0f8c431..4ac93e3 100644
--- a/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java
+++ b/test/de/inetsoftware/jwebassembly/runtime/ArrayOperations.java
@@ -18,6 +18,7 @@ package de.inetsoftware.jwebassembly.runtime;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.zip.CRC32;
 
 import org.junit.Assume;
 import org.junit.ClassRule;
@@ -56,6 +57,8 @@ public class ArrayOperations extends AbstractBaseTest {
             addParam( list, script, "loopFloat" );
             addParam( list, script, "loopDouble" );
             addParam( list, script, "loopObject" );
+            addParam( list, script, "copyBack2Front" );
+            addParam( list, script, "copyFront2Back" );
         }
         rule.setTestParameters( list );
         return list;
@@ -156,5 +159,31 @@ public class ArrayOperations extends AbstractBaseTest {
             }
             return sum;
         }
+
+        @Export
+        static double copyBack2Front() {
+            byte[] a = new byte[50];
+            for( int i = 0; i < a.length; i++ ) {
+                a[i] = (byte)i;
+            }
+
+            System.arraycopy( a, 20, a, 15, 10 );
+            CRC32 crc = new CRC32();
+            crc.update( a );
+            return crc.getValue();
+        }
+
+        @Export
+        static double copyFront2Back() {
+            byte[] a = new byte[50];
+            for( int i = 0; i < a.length; i++ ) {
+                a[i] = (byte)i;
+            }
+
+            System.arraycopy( a, 15, a, 20, 10 );
+            CRC32 crc = new CRC32();
+            crc.update( a );
+            return crc.getValue();
+        }
     }
 }