--- /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/LazyClassLoadingTest.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,99 @@
+/*
+ * 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 java.lang.reflect.*;
+
+import org.junit.*;
+
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.dsl.test.LazyClassLoadingTestFactory.TestNodeFactory;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.TestRootNode;
+import com.oracle.truffle.api.dsl.test.TypeSystemTest.ValueNode;
+
+public class LazyClassLoadingTest {
+    @Test
+    public void test() {
+        String factoryName = TestNodeFactory.class.getName();
+        String nodeName = factoryName + "$" + TestNode.class.getSimpleName() + "Gen";
+        Assert.assertTrue(isLoaded(factoryName));
+        Assert.assertFalse(isLoaded(nodeName));
+
+        NodeFactory<TestNode> factory = TestNodeFactory.getInstance();
+        Assert.assertTrue(isLoaded(factoryName));
+        Assert.assertTrue(isLoaded(nodeName));
+
+        Assert.assertFalse(isLoaded(nodeName + "$UninitializedNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$BaseNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$IntNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$BooleanNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$PolymorphicNode_"));
+
+        TestRootNode<TestNode> root = TestHelper.createRoot(factory);
+
+        Assert.assertTrue(isLoaded(nodeName + "$UninitializedNode_"));
+        Assert.assertTrue(isLoaded(nodeName + "$BaseNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$IntNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$BooleanNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$PolymorphicNode_"));
+
+        Assert.assertEquals(42, TestHelper.executeWith(root, 42));
+
+        Assert.assertTrue(isLoaded(nodeName + "$IntNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$BooleanNode_"));
+        Assert.assertFalse(isLoaded(nodeName + "$PolymorphicNode_"));
+
+        Assert.assertEquals(true, TestHelper.executeWith(root, true));
+
+        Assert.assertTrue(isLoaded(nodeName + "$IntNode_"));
+        Assert.assertTrue(isLoaded(nodeName + "$BooleanNode_"));
+        Assert.assertTrue(isLoaded(nodeName + "$PolymorphicNode_"));
+    }
+
+    private boolean isLoaded(String className) {
+        ClassLoader classLoader = getClass().getClassLoader();
+        Method m;
+        try {
+            m = ClassLoader.class.getDeclaredMethod("findLoadedClass", String.class);
+            m.setAccessible(true);
+            return m.invoke(classLoader, className) != null;
+        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @NodeChild("a")
+    abstract static class TestNode extends ValueNode {
+
+        @Specialization
+        int doInt(int a) {
+            return a;
+        }
+
+        @Specialization
+        boolean doBoolean(boolean a) {
+            return a;
+        }
+
+    }
+}