--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/modules/JVMIsExportedToModule.java	Thu Mar 17 19:04:01 2016 +0000
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2016, 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.
+ */
+
+/*
+ * @test
+ * @library /testlibrary /test/lib /compiler/whitebox ..
+ * @build sun.hotspot.WhiteBox
+ * @compile/module=java.base java/lang/reflect/ModuleHelper.java
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ *                              sun.hotspot.WhiteBox$WhiteBoxPermission
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI JVMIsExportedToModule
+ */
+
+import static jdk.test.lib.Asserts.*;
+
+public class JVMIsExportedToModule {
+
+    public static void main(String args[]) throws Throwable {
+        MyClassLoader from_cl = new MyClassLoader();
+        MyClassLoader to_cl = new MyClassLoader();
+        Object from_module, to_module;
+        boolean result;
+
+        from_module = ModuleHelper.ModuleObject("from_module", from_cl, new String[] { "mypackage", "this/package" });
+        assertNotNull(from_module, "Module from_module should not be null");
+        ModuleHelper.DefineModule(from_module, "9.0", "from_module/here", new String[] { "mypackage", "this/package" });
+        to_module = ModuleHelper.ModuleObject("to_module", to_cl, new String[] { "yourpackage", "that/package" });
+        assertNotNull(to_module, "Module to_module should not be null");
+        ModuleHelper.DefineModule(to_module, "9.0", "to_module/here", new String[] { "yourpackage", "that/package" });
+
+        Object unnamed_module = JVMIsExportedToModule.class.getModule();
+        assertNotNull(unnamed_module, "Module unnamed_module should not be null");
+
+        // Null from_module argument, expect an NPE
+        try {
+            result = ModuleHelper.IsExportedToModule(null, "mypackage", to_module);
+            throw new RuntimeException("Failed to get the expected NPE for null from_module");
+        } catch(NullPointerException e) {
+            // Expected
+        }
+
+        // Null to_module argument, expect an NPE
+        try {
+          result = ModuleHelper.IsExportedToModule(from_module, "mypackage", null);
+          throw new RuntimeException("Failed to get expected NPE for null to_module");
+        } catch(NullPointerException e) {
+            // Expected
+        }
+
+        // Null package argument, expect an NPE
+        try {
+            result = ModuleHelper.IsExportedToModule(from_module, null, to_module);
+            throw new RuntimeException("Failed to get the expected NPE for null package");
+        } catch(NullPointerException e) {
+            // Expected
+        }
+
+        // Bad from_module argument, expect an IAE
+        try {
+            result = ModuleHelper.IsExportedToModule(to_cl, "mypackage", to_module);
+            throw new RuntimeException("Failed to get the expected IAE for bad from_module");
+        } catch(IllegalArgumentException e) {
+            // Expected
+        }
+
+        // Bad to_module argument, expect an IAE
+        try {
+            result = ModuleHelper.IsExportedToModule(from_module, "mypackage", from_cl);
+            throw new RuntimeException("Failed to get the expected IAE");
+        } catch(IllegalArgumentException e) {
+            // Expected
+        }
+
+        // Check that package is exported to its own module
+        result = ModuleHelper.IsExportedToModule(from_module, "mypackage", from_module);
+        assertTrue(result, "Package is always exported to itself");
+
+        // Package is not in to_module, expect an IAE
+        try {
+            result = ModuleHelper.IsExportedToModule(from_module, "yourpackage", from_cl);
+            throw new RuntimeException("Failed to get the expected IAE for package not in to_module");
+        } catch(IllegalArgumentException e) {
+            // Expected
+        }
+
+        // Package is accessible when exported to unnamed module
+        ModuleHelper.AddModuleExportsToAll(from_module, "mypackage");
+        result = ModuleHelper.IsExportedToModule(from_module, "mypackage", to_module);
+        assertTrue(result, "Package exported to unnamed module is visible to named module");
+
+        result = ModuleHelper.IsExportedToModule(from_module, "mypackage", unnamed_module);
+        assertTrue(result, "Package exported to unnamed module is visible to unnamed module");
+
+        // Package is accessible only to named module when exported to named module
+        ModuleHelper.AddModuleExports(from_module, "this/package", to_module);
+        result = ModuleHelper.IsExportedToModule(from_module, "this/package", to_module);
+        assertTrue(result, "Package exported to named module is visible to named module");
+        result = ModuleHelper.IsExportedToModule(from_module, "this/package", unnamed_module);
+        assertTrue(!result, "Package exported to named module is not visible to unnamed module");
+    }
+
+    static class MyClassLoader extends ClassLoader { }
+}