--- /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/InsertBeforeTest.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2012, 2012, 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.TypeSystemTest.ValueNode;
+
+public class InsertBeforeTest {
+
+    @NodeChild("a")
+    static class InsertBefore1Base extends ValueNode {
+
+        @Specialization(guards = "a == 1")
+        int f1(int a) {
+            return a;
+        }
+
+        @Specialization(guards = "a == 2")
+        int f3(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    static class InsertBefore1T1 extends InsertBefore1Base {
+
+        @Specialization
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    static class InsertBefore1T2 extends InsertBefore1Base {
+
+        @Specialization(guards = "a == 0", insertBefore = "f1")
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    static class InsertBefore1T3 extends InsertBefore1Base {
+
+        @Specialization(guards = "a == 0", insertBefore = "f3")
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    @ExpectError({"Method f3(int) at annotation @Specialization is erroneous: Specialization is not reachable. It is shadowed by f0(int).",
+                    "Method f1(int) at annotation @Specialization is erroneous: Specialization is not reachable. It is shadowed by f0(int)."})
+    static class InsertBefore1T4 extends InsertBefore1Base {
+
+        @Specialization(insertBefore = "f1")
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    @ExpectError({"Method f3(int) at annotation @Specialization is erroneous: Specialization is not reachable. It is shadowed by f0(int)."})
+    static class InsertBefore1T5 extends InsertBefore1Base {
+
+        boolean g0(int a) {
+            return a == 0;
+        }
+
+        @Specialization(insertBefore = "f3")
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    static class InsertBefore1T6part1 extends InsertBefore1Base {
+
+        boolean g0(int a) {
+            return a == 0;
+        }
+
+        @Specialization(insertBefore = "f1", guards = "a == 0")
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    static class InsertBefore1T6part2 extends InsertBefore1T6part1 {
+
+        @Specialization(insertBefore = "f0", guards = "a == 3")
+        int f(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    static class InsertBefore1Error1 extends InsertBefore1Base {
+
+        @ExpectError("Specializations can only be inserted before specializations in superclasses.")
+        @Specialization(insertBefore = "f0")
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+    @NodeChild("a")
+    static class InsertBefore1Error2 extends InsertBefore1Base {
+
+        @ExpectError("The referenced specialization 'asdf' could not be found.")
+        @Specialization(insertBefore = "asdf")
+        int f0(int a) {
+            return a;
+        }
+
+    }
+
+}