QuotedPrintableInputStreamTest.java

/****************************************************************
 * 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.james.mime4j.codec;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

import junit.framework.TestCase;

import org.apache.log4j.BasicConfigurator;

public class QuotedPrintableInputStreamTest extends TestCase {

    @Override
    public void setUp() {
        BasicConfigurator.resetConfiguration();
        BasicConfigurator.configure();
    }
    
    public void testDecode() throws IOException, UnsupportedEncodingException {
        ByteArrayInputStream bis = null;
        QuotedPrintableInputStream decoder = null;

        bis = new ByteArrayInputStream("=e1=e2=E3=E4\r\n".getBytes("US-ASCII"));
        decoder = new QuotedPrintableInputStream(bis);
        assertEquals("\u00e1\u00e2\u00e3\u00e4\r\n", new String(read(decoder), "ISO8859-1"));
        
        bis = new ByteArrayInputStream("=e1=g2=E3=E4\r\n".getBytes("US-ASCII"));
        decoder = new QuotedPrintableInputStream(bis);
        assertEquals("\u00e1=g2\u00e3\u00e4\r\n", new String(read(decoder), "ISO8859-1"));
        
        bis = new ByteArrayInputStream("   =e1 =e2  =E3\t=E4  \t \t    \r\n".getBytes("US-ASCII"));
        decoder = new QuotedPrintableInputStream(bis);
        assertEquals("   \u00e1 \u00e2  \u00e3\t\u00e4\r\n", new String(read(decoder), "ISO8859-1"));
        
        /*
         * Test soft line breaks.
         */
        bis = new ByteArrayInputStream("Soft line   = \t \r\nHard line   \r\n".getBytes("US-ASCII"));
        decoder = new QuotedPrintableInputStream(bis);
        assertEquals("Soft line   Hard line\r\n", new String(read(decoder), "ISO8859-1"));
        
        /*
         * This isn't valid qp (==) but it is known to occur in certain
         * messages, especially spam.
         */
        bis = new ByteArrayInputStream("width==\r\n340 height=3d200\r\n".getBytes("US-ASCII"));
        decoder = new QuotedPrintableInputStream(bis);
        assertEquals("width=340 height=200\r\n", new String(read(decoder), "ISO8859-1"));
    }

    public void testDecodePrematureClose() throws IOException, UnsupportedEncodingException {
        ByteArrayInputStream bis = null;
        QuotedPrintableInputStream decoder = null;

        bis = new ByteArrayInputStream("=e1=e2=E3=E4\r\n".getBytes("US-ASCII"));
        decoder = new QuotedPrintableInputStream(bis);
        assertEquals('\u00e1', decoder.read());
        assertEquals('\u00e2', decoder.read());
        decoder.close();
        
        try {
            decoder.read();
            fail();
        } catch (IOException expected) {
        }
    }
    
    private byte[] read(InputStream is) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        int b;
        while ((b = is.read()) != -1) {
            bos.write(b);
        }
        return bos.toByteArray();
    }
}