--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.graal.hotspot.test/src/com/oracle/graal/hotspot/test/GraalClassLoaderTest.java	Tue Jul 29 16:58:05 2014 +0200
@@ -0,0 +1,58 @@
+/*
+ * 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.graal.hotspot.test;
+
+import org.junit.*;
+
+import sun.management.*;
+
+import com.oracle.graal.api.runtime.*;
+import com.sun.management.*;
+
+/**
+ * Tests that the Graal API is inaccessible when -XX:+UseGraalClassLoader is specified. Execute as
+ * follows to show class loader based isolation:
+ *
+ * <pre>
+ * mx unittest -XX:+UseGraalClassLoader GraalClassLoaderTest
+ * </pre>
+ */
+public class GraalClassLoaderTest {
+
+    @Test
+    public void test() throws Exception {
+        if (System.getProperty("java.vm.version").contains("graal")) {
+            HotSpotDiagnosticMXBean diag = ManagementFactoryHelper.getDiagnosticMXBean();
+            VMOption option = diag.getVMOption("UseGraalClassLoader");
+            if (option.getValue().equals("true")) {
+                try {
+                    Graal.getRuntime();
+                    Assert.fail();
+                } catch (NoClassDefFoundError e) {
+                    // expected
+                }
+            }
+        }
+    }
+
+}
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