/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.fileupload.util.mime;

import static org.junit.Assert.assertArrayEquals;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import org.junit.Test;

/**
 * @since 1.3
 */
public final class QuotedPrintableDecoderTestCase {

    private static final String US_ASCII_CHARSET = "US-ASCII";

    @Test
    public void basicEncodeDecode() throws Exception {
        assertEncoded("= Hello there =\r\n", "=3D Hello there =3D=0D=0A");
    }

    @Test(expected = IOException.class)
    public void invalidQuotedPrintableEncoding() throws Exception {
        assertEncoded("abc123_-.*~!@#$%^&()+{}\"\\;:`,/[]", "YWJjMTIzXy0uKn4hQCMkJV4mKCkre31cIlxcOzpgLC9bXQ==");
    }

    @Test
    public void unsafeDecode() throws Exception {
        assertEncoded("=\r\n", "=3D=0D=0A");
    }

    /**
     * This is NOT supported by Commons-Codec, see CODEC-121.
     *
     * @throws Exception
     * @see <a href="https://issues.apache.org/jira/browse/CODEC-121">CODEC-121</a>
     */
    @Test
    public void softLineBreakDecode() throws Exception {
        assertEncoded("If you believe that truth=beauty, then surely mathematics is the most beautiful branch of philosophy.",
                      "If you believe that truth=3Dbeauty, then surely=20=\r\nmathematics is the most beautiful branch of philosophy.");
    }

    private static void assertEncoded(String clearText, String encoded) throws Exception {
        byte[] expected = clearText.getBytes(US_ASCII_CHARSET);

        ByteArrayOutputStream out = new ByteArrayOutputStream(encoded.length());
        byte[] encodedData = encoded.getBytes(US_ASCII_CHARSET);
        QuotedPrintableDecoder.decode(encodedData, out);
        byte[] actual = out.toByteArray();

        assertArrayEquals(expected, actual);
    }

}

@@ -895,16 +895,96 @@
 yEquals;
+%0Aimport static org.junit.Assert.fail;%0Aimport static org.junit.Assert.assertTrue;
 %0A%0Aimport
@@ -1042,16 +1042,61 @@
 ception;
+%0Aimport java.io.UnsupportedEncodingException;
 %0A%0Aimport
@@ -2267,24 +2267,413 @@
 .%22);%0A    %7D%0A%0A
+    @Test%0A    public void invalidSoftBreak1() throws Exception %7B%0A        assertIOException(%22CR must be followed by LF%22, %22=%5Cr%5Cr%22);%0A    %7D%0A%0A    @Test%0A    public void invalidSoftBreak2() throws Exception %7B%0A        assertIOException(%22CR must be followed by LF%22, %22=%5Crn%22);%0A    %7D%0A%0A    @Test%0A    public void truncatedEscape() throws Exception %7B%0A        assertIOException(%22truncated%22, %22=1%22);%0A    %7D%0A%0A
     private 
@@ -3059,24 +3059,24 @@
 teArray();%0A%0A
-
         asse
@@ -3115,10 +3115,585 @@
 %0A    %7D%0A%0A
+    private static void assertIOException(String messageText, String encoded) throws UnsupportedEncodingException %7B%0A        ByteArrayOutputStream out = new ByteArrayOutputStream(encoded.length());%0A        byte%5B%5D encodedData = encoded.getBytes(US_ASCII_CHARSET);%0A        try %7B%0A            QuotedPrintableDecoder.decode(encodedData, out);%0A            fail(%22Expected IOException%22);%0A        %7D catch (IOException e) %7B%0A            String em = e.getMessage();%0A            assertTrue(%22Expected to find %22 + messageText + %22 in '%22 + em + %22'%22,em.contains(messageText));        %7D%0A%0A    %7D%0A%0A
 %7D%0A

Test some error conditions