core/src/test/java/org/apache/james/mime4j/codec/QuotedPrintableOutputStreamTest.java

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package org.apache.james.mime4j.codec;

import org.junit.Assert;
import static org.junit.Assert.fail;
import org.junit.Test;

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

public class QuotedPrintableOutputStreamTest {

    @Test
    public void testEncode() throws IOException {
        ByteArrayOutputStream bos;
        QuotedPrintableOutputStream encoder;

        /*
         * Simple initial test.
         */
        bos = new ByteArrayOutputStream();
        encoder = new QuotedPrintableOutputStream(bos, false);
        encoder.write(fromString("This is the plain text message containing a few euros: 100 \u20ac!"));
        encoder.close();
        Assert.assertEquals("This is the plain text message containing a few euros: 100 =E2=82=AC!",
                toString(bos.toByteArray()));
    }

    @Test
    public void testEncodeUnderlyingStreamStaysOpen() throws IOException {
        ByteArrayOutputStream bos;
        QuotedPrintableOutputStream encoder;

        bos = new ByteArrayOutputStream();
        encoder = new QuotedPrintableOutputStream(bos, false);
        encoder.write(fromString("This is the plain text message containing a few euros: 100 \u20ac!"));
        encoder.close();

        try {
            encoder.write('b');
            Assert.fail();
        } catch (IOException expected) {
        }

        bos.write('y');
        bos.write('a');
        bos.write('d');
        bos.write('a');
        Assert.assertEquals("This is the plain text message containing a few euros: 100 =E2=82=AC!yada",
                toString(bos.toByteArray()));
    }

    @Test
    public void testEncodeSpecials() throws IOException {
        ByteArrayOutputStream bos;
        QuotedPrintableOutputStream encoder;

        bos = new ByteArrayOutputStream();
        encoder = new QuotedPrintableOutputStream(bos, false);
        encoder.write(fromString("Testing \u20ac special . chars = also at the end ="));
        encoder.close();
        Assert.assertEquals("Testing =E2=82=AC special =2E chars =3D also at the end =3D",
                toString(bos.toByteArray()));
    }

    @Test
    public void testEncodeWrapping() throws IOException {
        ByteArrayOutputStream bos;
        QuotedPrintableOutputStream encoder;

        bos = new ByteArrayOutputStream();
        encoder = new QuotedPrintableOutputStream(bos, false);
        encoder.write(fromString("This is a very very very very very very very very very very very very very very very long line"));
        encoder.close();
        Assert.assertEquals("This is a very very very very very very very very very very very very very =\r\nvery very long line",
                toString(bos.toByteArray()));
    }

    private byte[] fromString(String s) {
        try {
            return s.getBytes("UTF-8");
        } catch (UnsupportedEncodingException e) {
            fail(e.getMessage());
            return null;
        }
    }

    private String toString(byte[] b) {
        try {
            return new String(b, "US-ASCII");
        } catch (UnsupportedEncodingException e) {
            fail(e.getMessage());
            return null;
        }
    }
}