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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.mime.test;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import junit.framework.TestCase;
import org.bouncycastle.mime.BoundaryLimitedInputStream;
import org.bouncycastle.util.io.Streams;

public class TestBoundaryLimitedInputStream
    extends TestCase
{
    public void testBoundaryAfterCRLF()
        throws Exception
    {
        String data = "The cat sat on the mat\r\n" +
            "then it went to sleep";


        ByteArrayInputStream bin = new ByteArrayInputStream((data + "\r\n--banana").getBytes());

        BoundaryLimitedInputStream blin = new BoundaryLimitedInputStream(bin, "banana");

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        Streams.pipeAll(blin, bos);

        TestCase.assertEquals(data, bos.toString());
    }

    public void testBoundaryAfterCRLFTrailingLineInContent()
        throws Exception
    {
        String data = "The cat sat on the mat\r\n" +
            "then it went to sleep\r\n";


        ByteArrayInputStream bin = new ByteArrayInputStream((data + "\r\n--banana").getBytes());

        BoundaryLimitedInputStream blin = new BoundaryLimitedInputStream(bin, "banana");

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        Streams.pipeAll(blin, bos);

        TestCase.assertEquals(data, bos.toString());
    }

    public void testBoundaryAfterLF()
        throws Exception
    {
        String data = "The cat sat on the mat\r\n" +
            "then it went to sleep";


        ByteArrayInputStream bin = new ByteArrayInputStream((data + "\n--banana").getBytes());

        BoundaryLimitedInputStream blin = new BoundaryLimitedInputStream(bin, "banana");

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        Streams.pipeAll(blin, bos);

        TestCase.assertEquals(data, bos.toString());
    }

    public void testBoundaryAfterLFTrailingLine()
        throws Exception
    {
        String data = "The cat sat on the mat\r\n" +
            "then it went to sleep\n";


        ByteArrayInputStream bin = new ByteArrayInputStream((data + "\n--banana").getBytes());

        BoundaryLimitedInputStream blin = new BoundaryLimitedInputStream(bin,"banana");

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        Streams.pipeAll(blin, bos);

        TestCase.assertEquals(data, bos.toString());
    }
}