--- /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/BinaryNodeTest.java	Mon Jul 01 20:58:32 2013 +0200
@@ -0,0 +1,79 @@
+/*
+ * 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 static com.oracle.truffle.api.dsl.test.TestHelper.*;
+import static org.junit.Assert.*;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.BinaryNodeTestFactory.AddNodeFactory;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.TestRootNode;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+
+public class BinaryNodeTest {
+
+    @Test
+    public void testAdd() {
+        TestRootNode<AddNode> node = createRoot(AddNodeFactory.getInstance());
+        assertEquals(42, executeWith(node, 19, 23));
+        assertEquals(42d, executeWith(node, 19d, 23d));
+        assertEquals(42d, executeWith(node, "19", "23"));
+        assertEquals(42, executeWith(node, 19, 23));
+    }
+
+    @Test(expected = RuntimeException.class)
+    public void testAddUnsupported() {
+        TestRootNode<AddNode> node = createRoot(AddNodeFactory.getInstance());
+        executeWith(node, new Object(), new Object());
+    }
+
+    @NodeChildren({@NodeChild("left"), @NodeChild("right")})
+    abstract static class BinaryNode extends ValueNode {
+    }
+
+    abstract static class AddNode extends BinaryNode {
+
+        @Specialization
+        int add(int left, int right) {
+            return left + right;
+        }
+
+        @Generic
+        Object add(Object left, Object right) {
+            return convertDouble(left) + convertDouble(right);
+        }
+
+        static double convertDouble(Object value) {
+            if (value instanceof Number) {
+                return ((Number) value).doubleValue();
+            } else if (value instanceof String) {
+                return Double.parseDouble((String) value);
+            }
+            throw new RuntimeException("Invalid datatype");
+        }
+
+    }
+
+}