@@ -0,0 +1,1839 @@
+/*%0A * Licensed to the Apache Software Foundation (ASF) under one or more%0A * contributor license agreements.  See the NOTICE file distributed with%0A * this work for additional information regarding copyright ownership.%0A * The ASF licenses this file to You under the Apache License, Version 2.0%0A * (the %22License%22); you may not use this file except in compliance with%0A * the License.  You may obtain a copy of the License at%0A *%0A *      http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0Apackage org.apache.commons.collections4;%0A%0Aimport junit.framework.Test;%0A%0Aimport org.apache.commons.collections4.trie.PatriciaTrie;%0Aimport org.apache.commons.collections4.trie.UnmodifiableTrie;%0A%0A/**%0A * Tests for TrieUtils factory methods.%0A *%0A * @version $Id$%0A */%0Apublic class TrieUtilsTest extends BulkTest %7B%0A%0A    public TrieUtilsTest(final String name) %7B%0A        super(name);%0A    %7D%0A%0A%0A    public static Test suite() %7B%0A        return BulkTest.makeSuite(TrieUtilsTest.class);%0A    %7D%0A%0A    //----------------------------------------------------------------------%0A%0A    public void testUnmodifiableTrie() %7B%0A        Trie%3CString, Object%3E trie = TrieUtils.unmodifiableTrie(new PatriciaTrie%3CObject%3E());%0A        assertTrue(%22Returned object should be an UnmodifiableTrie.%22,%0A            trie instanceof UnmodifiableTrie);%0A        try %7B%0A            TrieUtils.unmodifiableTrie(null);%0A            fail(%22Expecting IllegalArgumentException for null trie.%22);%0A        %7D catch (final IllegalArgumentException ex) %7B%0A            // expected%0A        %7D%0A    %7D%0A%0A%7D%0A%0A%0A

Add unit test for TrieUtils.