--- /dev/null
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.yang2sources.plugin;
+
+import static org.junit.Assert.*;
+
+import java.io.File;
+import java.util.Collection;
+
+import org.junit.Test;
+
+public class UtilTest {
+
+ @Test
+ public void testCache() {
+ String yang = new File(getClass().getResource("/mock.yang").getFile())
+ .getParent();
+ Collection<File> files = Util.listFiles(yang);
+ Collection<File> files2 = Util.listFiles(yang);
+ assertTrue(files == files2);
+ }
+
+}