diff --git a/libsrc/ffdec_lib/test/com/jpexs/decompiler/flash/generators/AS3NewAssemblyGenerator.java b/libsrc/ffdec_lib/test/com/jpexs/decompiler/flash/generators/AS3NewAssemblyGenerator.java
new file mode 100644
index 000000000..fb5a1236d
--- /dev/null
+++ b/libsrc/ffdec_lib/test/com/jpexs/decompiler/flash/generators/AS3NewAssemblyGenerator.java
@@ -0,0 +1,48 @@
+/*
+ *  Copyright (C) 2010-2018 JPEXS, All rights reserved.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3.0 of the License, or (at your option) any later version.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.
+ */
+package com.jpexs.decompiler.flash.generators;
+
+import com.jpexs.helpers.Helper;
+import java.io.UnsupportedEncodingException;
+import java.util.Scanner;
+
+/**
+ *
+ * @author JPEXS
+ */
+public class AS3NewAssemblyGenerator {
+    public static void main(String[] args) throws UnsupportedEncodingException {
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter test class name:");
+        final String DIR = "testdata/custom/abc/custom-0/";
+        String className = sc.nextLine();
+        String templateClassData = Helper.readTextFile(DIR + "tests/Template.class.asasm");
+        String templateScriptData = Helper.readTextFile(DIR + "tests/Template.script.asasm");
+        String mainData = Helper.readTextFile(DIR + "custom-0.main.asasm");
+
+        String classData = templateClassData.replace("Template", className);;
+        String scriptData = templateScriptData.replace("Template", className);
+        final String PLACEHOLDER = " ; place to add next\n";
+
+        String mainDataUpdated = mainData.replace(PLACEHOLDER, " #include \"tests/" + className + ".script.asasm\"\n" + PLACEHOLDER);
+
+        Helper.writeFile(DIR + "tests/" + className + ".class.asasm", classData.getBytes("UTF-8"));
+        Helper.writeFile(DIR + "tests/" + className + ".script.asasm", scriptData.getBytes("UTF-8"));
+        Helper.writeFile(DIR + "custom-0.main.asasm", mainDataUpdated.getBytes("UTF-8"));
+
+    }
+}
diff --git a/libsrc/ffdec_lib/testdata/custom/abc/custom-0/tests/Template.class.asasm b/libsrc/ffdec_lib/testdata/custom/abc/custom-0/tests/Template.class.asasm
new file mode 100644
index 000000000..2862c03f4
--- /dev/null
+++ b/libsrc/ffdec_lib/testdata/custom/abc/custom-0/tests/Template.class.asasm
@@ -0,0 +1,62 @@
+class
+ refid "tests:Template"
+ instance QName(PackageNamespace("tests"), "Template")
+  extends QName(PackageNamespace(""), "Object")
+  flag SEALED
+  flag PROTECTEDNS
+  protectedns ProtectedNamespace("tests:Template")
+  iinit
+   refid "tests:Template/instance/init"
+   body
+    maxstack 1
+    localcount 1
+    initscopedepth 4
+    maxscopedepth 5
+    code
+     getlocal0
+     pushscope
+
+     getlocal0
+     constructsuper      0
+
+     returnvoid
+    end ; code
+   end ; body
+  end ; method
+  trait method QName(PackageNamespace(""), "run")
+   method
+    refid "tests:Template/instance/run"
+    returns QName(PackageNamespace(""), "void")
+    body
+     maxstack 2
+     localcount 4
+     initscopedepth 4
+     maxscopedepth 5
+     code
+      getlocal0
+      pushscope
+
+      ; TODO: insertcode here
+      
+      returnvoid
+     end ; code
+    end ; body
+   end ; method
+  end ; trait
+ end ; instance
+ cinit
+  refid "tests:Template/class/init"
+  body
+   maxstack 1
+   localcount 1
+   initscopedepth 3
+   maxscopedepth 4
+   code
+    getlocal0
+    pushscope
+
+    returnvoid
+   end ; code
+  end ; body
+ end ; method
+end ; class
diff --git a/libsrc/ffdec_lib/testdata/custom/abc/custom-0/tests/Template.script.asasm b/libsrc/ffdec_lib/testdata/custom/abc/custom-0/tests/Template.script.asasm
new file mode 100644
index 000000000..cfc0a68a1
--- /dev/null
+++ b/libsrc/ffdec_lib/testdata/custom/abc/custom-0/tests/Template.script.asasm
@@ -0,0 +1,29 @@
+script
+ sinit
+  refid "tests:Template/init"
+  body
+   maxstack 2
+   localcount 1
+   initscopedepth 1
+   maxscopedepth 3
+   code
+    getlocal0
+    pushscope
+
+    findpropstrict      Multiname("Template", [PackageNamespace("tests")])
+    getlex              QName(PackageNamespace(""), "Object")
+    pushscope
+
+    getlex              Multiname("Object", [PrivateNamespace(null, "tests:Template"), PackageNamespace(""), PackageNamespace("tests"), PackageInternalNs("tests"), Namespace("http://adobe.com/AS3/2006/builtin")])
+    newclass            "tests:Template"
+    popscope
+    initproperty        QName(PackageNamespace("tests"), "Template")
+
+    returnvoid
+   end ; code
+  end ; body
+ end ; method
+ trait class QName(PackageNamespace("tests"), "Template")
+  #include "Template.class.asasm"
+ end ; trait
+end ; script