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 */
017package org.apache.commons.fileupload2.core;
018
019import static org.junit.jupiter.api.Assertions.assertEquals;
020import static org.junit.jupiter.api.Assertions.assertFalse;
021import static org.junit.jupiter.api.Assertions.assertThrows;
022import static org.junit.jupiter.api.Assertions.assertTrue;
023
024import java.io.UnsupportedEncodingException;
025
026import org.junit.jupiter.api.Test;
027
028/**
029 * The expected characters are encoded in UTF16, while the actual characters may be encoded in UTF-8/ISO-8859-1
030 *
031 * RFC 5987 recommends to support both UTF-8 and ISO 8859-1. Test values are taken from https://tools.ietf.org/html/rfc5987#section-3.2.2
032 */
033public final class RFC2231UtilityTestCase {
034
035    private static void assertEncoded(final String expected, final String encoded) throws Exception {
036        assertEquals(expected, RFC2231Utils.decodeText(encoded));
037    }
038
039    @Test
040    public void testDecodeInvalidEncoding() throws Exception {
041        assertThrows(UnsupportedEncodingException.class, () -> RFC2231Utils.decodeText("abc'en'hello"));
042    }
043
044    @Test
045    public void testDecodeIso88591() throws Exception {
046        assertEncoded("\u00A3 rate", "iso-8859-1'en'%A3%20rate"); // "£ rate"
047    }
048
049    @Test
050    public void testDecodeUtf8() throws Exception {
051        assertEncoded("\u00a3 \u0061\u006e\u0064 \u20ac \u0072\u0061\u0074\u0065\u0073", "UTF-8''%c2%a3%20and%20%e2%82%ac%20rates"); // "£ and € rates"
052    }
053
054    @Test
055    public void testHasEncodedValue() {
056        final var nameWithAsteriskAtEnd = "paramname*";
057        assertTrue(RFC2231Utils.hasEncodedValue(nameWithAsteriskAtEnd));
058
059        final var nameWithAsteriskNotAtEnd = "param*name";
060        assertFalse(RFC2231Utils.hasEncodedValue(nameWithAsteriskNotAtEnd));
061
062        final var nameWithoutAsterisk = "paramname";
063        assertFalse(RFC2231Utils.hasEncodedValue(nameWithoutAsterisk));
064    }
065
066    @Test
067    public void testNoNeedToDecode() throws Exception {
068        assertEncoded("abc", "abc");
069    }
070
071    @Test
072    public void testStripDelimiter() {
073        final var nameWithAsteriskAtEnd = "paramname*";
074        assertEquals("paramname", RFC2231Utils.stripDelimiter(nameWithAsteriskAtEnd));
075
076        final var nameWithAsteriskNotAtEnd = "param*name";
077        assertEquals("param*name", RFC2231Utils.stripDelimiter(nameWithAsteriskNotAtEnd));
078
079        final var nameWithTwoAsterisks = "param*name*";
080        assertEquals("param*name", RFC2231Utils.stripDelimiter(nameWithTwoAsterisks));
081
082        final var nameWithoutAsterisk = "paramname";
083        assertEquals("paramname", RFC2231Utils.stripDelimiter(nameWithoutAsterisk));
084    }
085}