src/test/java/org/apache/james/mime4j/decoder/QuotedPrintableInputStreamTest.java

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package org.apache.james.mime4j.decoder;

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.james.mime4j.decoder.QuotedPrintableInputStream;
import org.apache.log4j.BasicConfigurator;

/**
 * 
 *
 * 
 * @version $Id: QuotedPrintableInputStreamTest.java,v 1.3 2004/10/04 15:36:44 ntherning Exp $
 */
public class QuotedPrintableInputStreamTest extends TestCase {

    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"));
    }

    
    private byte[] read(InputStream is) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        int b;
        while ((b = is.read()) != -1) {
            bos.write(b);
        }
        return bos.toByteArray();
    }
}