--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/TypeSystemErrorsTest.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2012, 2013, 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.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.dsl.test;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.TypeSystemErrorsTest.Types1.Type1;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+
+public class TypeSystemErrorsTest {
+
+    @TypeSystem({int.class, boolean.class})
+    public static class ErrorTypes0 {
+
+    }
+
+    @ExpectError("Invalid type order. The type(s) [java.lang.String] are inherited from a earlier defined type java.lang.CharSequence.")
+    @TypeSystem({CharSequence.class, String.class})
+    public static class ErrorTypes1 {
+
+    }
+
+    public static class Types1 {
+        public static class Type1 {
+        }
+    }
+
+    public static class Types2 {
+        public static class Type1 {
+        }
+    }
+
+    // verify boxed type overlay
+    @ExpectError("Two types result in the same boxed name: Type1.")
+    @TypeSystem({Type1.class, com.oracle.truffle.api.dsl.test.TypeSystemErrorsTest.Types2.Type1.class})
+    public static class ErrorTypes2 {
+
+    }
+
+    public static class Types3 {
+        public static class Object {
+        }
+    }
+
+    // verify Object name cannot appear
+    @ExpectError("Two types result in the same boxed name: Object.")
+    @TypeSystem({com.oracle.truffle.api.dsl.test.TypeSystemErrorsTest.Types3.Object.class})
+    public static class ErrorTypes3 {
+    }
+
+    public static class Types4 {
+        public static class Integer {
+        }
+    }
+
+    // verify int boxed name
+    @ExpectError("Two types result in the same boxed name: Integer.")
+    @TypeSystem({int.class, com.oracle.truffle.api.dsl.test.TypeSystemErrorsTest.Types4.Integer.class})
+    public static class ErrorTypes4 {
+    }
+
+    @TypeSystemReference(ErrorTypes0.class)
+    @NodeChild
+    @ExpectError("The @TypeSystem of the node and the @TypeSystem of the @NodeChild does not match. Types0 != SimpleTypes. ")
+    abstract static class ErrorNode1 extends ValueNode {
+    }
+
+    @TypeSystem({int.class})
+    public static class CastError1 {
+        @TypeCast(int.class)
+        @ExpectError("The provided return type \"String\" does not match expected return type \"int\".%")
+        public static String asInteger(Object value) {
+            return (String) value;
+        }
+    }
+
+    @TypeSystem({int.class})
+    public static class CastError2 {
+        @TypeCast(int.class)
+        @ExpectError("The provided return type \"boolean\" does not match expected return type \"int\".%")
+        public static boolean asInteger(Object value) {
+            return (boolean) value;
+        }
+    }
+
+    @TypeSystem({int.class})
+    public static class CastError4 {
+        @ExpectError("@TypeCast annotated method asInt must be public and static.")
+        @TypeCast(int.class)
+        public int asInt(Object value) {
+            return (int) value;
+        }
+    }
+
+    @TypeSystem({int.class})
+    public static class CastError5 {
+        @ExpectError("@TypeCast annotated method asInt must be public and static.")
+        @TypeCast(int.class)
+        static int asInt(Object value) {
+            return (int) value;
+        }
+    }
+
+    @TypeSystem({int.class})
+    public static class CheckError2 {
+        @ExpectError("@TypeCheck annotated method isInt must be public and static.")
+        @TypeCheck(int.class)
+        public boolean isInt(Object value) {
+            return value instanceof Integer;
+        }
+    }
+
+    @TypeSystem({int.class})
+    public static class CheckError3 {
+        @ExpectError("@TypeCheck annotated method isInt must be public and static.")
+        @TypeCheck(int.class)
+        static boolean isInt(Object value) {
+            return value instanceof Integer;
+        }
+    }
+
+}