--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/lib/testlibrary/ModuleUtils.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReader;
+import java.lang.module.ModuleReference;
+import java.net.URI;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+
+
+/**
+ * This class consists exclusively of static utility methods that are useful
+ * for creating tests for modules.
+ */
+
+public final class ModuleUtils {
+    private ModuleUtils() { }
+
+
+    /**
+     * Returns a ModuleFinder that finds modules with the given module
+     * descriptors.
+     */
+    static ModuleFinder finderOf(ModuleDescriptor... descriptors) {
+
+        // Create a ModuleReference for each module
+        Map<String, ModuleReference> namesToReference = new HashMap<>();
+
+        for (ModuleDescriptor descriptor : descriptors) {
+            String name = descriptor.name();
+
+            URI uri = URI.create("module:/" + name);
+
+            ModuleReference mref = new ModuleReference(descriptor, uri) {
+                @Override
+                public ModuleReader open() {
+                    throw new UnsupportedOperationException();
+                }
+            };
+
+            namesToReference.put(name, mref);
+        }
+
+        return new ModuleFinder() {
+            @Override
+            public Optional<ModuleReference> find(String name) {
+                Objects.requireNonNull(name);
+                return Optional.ofNullable(namesToReference.get(name));
+            }
+            @Override
+            public Set<ModuleReference> findAll() {
+                return new HashSet<>(namesToReference.values());
+            }
+        };
+    }
+
+}