apache-mime4j-0.6/src/test/java/org/apache/james/mime4j/io/LimitedInputStreamTest.java

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package org.apache.james.mime4j.io;

import java.io.ByteArrayInputStream;
import java.io.IOException;

import junit.framework.TestCase;

public class LimitedInputStreamTest extends TestCase {

    public void testUpToLimitRead() throws IOException {
        byte[] data = new byte[] {'0', '1', '2', '3', '4', '5', '6'};
        ByteArrayInputStream instream = new ByteArrayInputStream(data);
        LimitedInputStream limitedStream = new LimitedInputStream(instream, 3);
        assertEquals(0, limitedStream.getPosition());
        assertTrue(limitedStream.read() != -1);
        assertEquals(1, limitedStream.getPosition());
        byte[] tmp = new byte[3];
        assertEquals(2, limitedStream.read(tmp));
        assertEquals(3, limitedStream.getPosition());
        try {
            limitedStream.read();
            fail("IOException should have been thrown");
        } catch (IOException ex) {
        }
        try {
            limitedStream.read(tmp);
            fail("IOException should have been thrown");
        } catch (IOException ex) {
        }
        try {
            limitedStream.skip(2);
            fail("IOException should have been thrown");
        } catch (IOException ex) {
        }
    }
    
}