--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.dsl.test/src/com/oracle/truffle/api/dsl/test/ExecuteMethodTest.java	Mon Jan 05 01:31:08 2015 +0100
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2014, 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.nodes.*;
+
+public class ExecuteMethodTest {
+
+    private static final String NO_EXECUTE = "No accessible and overridable generic execute method found. Generic execute methods usually have the signature 'public abstract {Type} "
+                    + "executeGeneric(VirtualFrame)' and must not throw any checked exceptions.";
+
+    @TypeSystem({int.class, Object[].class})
+    static class ExecuteTypeSystem {
+
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    abstract static class ValidChildNode extends Node {
+        abstract Object execute();
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    @ExpectError(NO_EXECUTE)
+    abstract static class ExecuteThis1 extends Node {
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    @ExpectError(NO_EXECUTE)
+    abstract static class ExecuteThis2 extends Node {
+
+        abstract Object execute() throws UnexpectedResultException;
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    @ExpectError(NO_EXECUTE)
+    abstract static class ExecuteThis3 extends Node {
+
+        abstract int execute() throws UnexpectedResultException;
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    abstract static class ExecuteThis4 extends Node {
+
+        protected abstract Object execute();
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    abstract static class ExecuteThis5 extends Node {
+
+        public abstract Object execute();
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    @ExpectError(NO_EXECUTE)
+    abstract static class ExecuteThis6 extends Node {
+
+        @SuppressWarnings({"unused", "static-method"})
+        private Object execute() {
+            return 0;
+        }
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    @ExpectError(NO_EXECUTE)
+    abstract static class ExecuteThis7 extends Node {
+
+        @SuppressWarnings("static-method")
+        public final int executeInt() {
+            return 0;
+        }
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    @ExpectError("Multiple accessible and overridable generic execute methods found [executeInt(), executeObject()]. Remove all but one or mark all but one as final.")
+    abstract static class ExecuteThis8 extends Node {
+
+        abstract int executeInt();
+
+        abstract Object executeObject();
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+
+    }
+
+    @TypeSystemReference(ExecuteTypeSystem.class)
+    @NodeChild(value = "a", type = ValidChildNode.class)
+    abstract static class ExecuteThis9 extends Node {
+
+        abstract int executeInt();
+
+        // disambiguate executeObject
+        final Object executeObject() {
+            return executeInt();
+        }
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+    }
+
+}