001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 * 
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 * 
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.lang3.text.translate;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.fail;
022
023import org.junit.Test;
024
025/**
026 * Unit tests for {@link org.apache.commons.lang3.text.translate.UnicodeEscaper}.
027 * @version $Id: UnicodeUnescaperTest.java 1436770 2013-01-22 07:09:45Z ggregory $
028 */
029public class UnicodeUnescaperTest {
030
031    // Requested in LANG-507
032    @Test
033    public void testUPlus() {
034        final UnicodeUnescaper uu = new UnicodeUnescaper();
035
036        final String input = "\\u+0047";
037        assertEquals("Failed to unescape Unicode characters with 'u+' notation", "G", uu.translate(input));
038    }
039
040    @Test
041    public void testUuuuu() {
042        final UnicodeUnescaper uu = new UnicodeUnescaper();
043
044        final String input = "\\uuuuuuuu0047";
045        final String result = uu.translate(input);
046        assertEquals("Failed to unescape Unicode characters with many 'u' characters", "G", result);
047    }
048
049    @Test
050    public void testLessThanFour() {
051        final UnicodeUnescaper uu = new UnicodeUnescaper();
052
053        final String input = "\\0047\\u006";
054        try {
055            uu.translate(input);
056            fail("A lack of digits in a Unicode escape sequence failed to throw an exception");
057        } catch(final IllegalArgumentException iae) {
058            // expected
059        }
060    }
061}