diff -r 10d26626c426 -r ca538fb33f48 rt/vm/src/test/java/org/apidesign/vm4brwsr/Array.java
--- a/rt/vm/src/test/java/org/apidesign/vm4brwsr/Array.java	Tue May 06 08:36:54 2014 +0200
+++ b/rt/vm/src/test/java/org/apidesign/vm4brwsr/Array.java	Tue May 06 10:08:42 2014 +0200
@@ -115,9 +115,42 @@
     }
     
     public static boolean instanceOfArray(Object obj) {
+        if ("string-array".equals(obj)) {
+            obj = new String[] { "Ahoj" };
+        }
         return obj instanceof Object[];
     }
     
+    public static boolean castArray(int type) {
+        try {
+            Object orig = new Object();
+            Object res = orig;
+            if (type == 0) {
+                Object[] arr = new Integer[1];
+                String[] str = (String[]) arr;
+                res = str;
+            }
+            if (type == 1) {
+                Object[] arr = null;
+                String[] str = (String[]) arr;
+                res = str;
+            }
+            if (type == 2) {
+                Object[] arr = new String[1];
+                String[] str = (String[]) arr;
+                res = str;
+            }
+            if (type == 3) {
+                Object[] arr = new String[1];
+                CharSequence[] str = (CharSequence[]) arr;
+                res = str;
+            }
+            return res != orig;
+        } catch (ClassCastException ex) {
+            return false;
+        }
+    }
+    
     public static int sum(int size) {
         int[] arr = new int[size];
         return arr[0] + arr[1];