proton-j/src/test/java/org/apache/qpid/proton/codec/UnsignedIntegerTypeTest.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.qpid.proton.codec;

import static org.junit.Assert.*;

import org.apache.qpid.proton.amqp.UnsignedInteger;
import org.apache.qpid.proton.codec.UnsignedIntegerType.UnsignedIntegerEncoding;
import org.junit.Test;

public class UnsignedIntegerTypeTest
{
    @Test
    public void testGetEncodingWithZero()
    {
        DecoderImpl decoder = new DecoderImpl();
        EncoderImpl encoder = new EncoderImpl(decoder);
        UnsignedIntegerType ult = new UnsignedIntegerType(encoder, decoder);

        //values of 0 are encoded as a specific type
        UnsignedIntegerEncoding encoding = ult.getEncoding(UnsignedInteger.valueOf(0L));
        assertEquals("incorrect encoding returned", EncodingCodes.UINT0, encoding.getEncodingCode());
    }

    @Test
    public void testGetEncodingWithSmallPositiveValue()
    {
        DecoderImpl decoder = new DecoderImpl();
        EncoderImpl encoder = new EncoderImpl(decoder);
        UnsignedIntegerType ult = new UnsignedIntegerType(encoder, decoder);

        //values between 0 and 255 are encoded as a specific 'small' type using a single byte
        UnsignedIntegerEncoding encoding = ult.getEncoding(UnsignedInteger.valueOf(1L));
        assertEquals("incorrect encoding returned", EncodingCodes.SMALLUINT, encoding.getEncodingCode());
    }

    @Test
    public void testGetEncodingWithTwoToThirtyOne()
    {
        DecoderImpl decoder = new DecoderImpl();
        EncoderImpl encoder = new EncoderImpl(decoder);
        UnsignedIntegerType ult = new UnsignedIntegerType(encoder, decoder);

        long val = Integer.MAX_VALUE + 1L;
        UnsignedIntegerEncoding encoding = ult.getEncoding(UnsignedInteger.valueOf(val));
        assertEquals("incorrect encoding returned", EncodingCodes.UINT, encoding.getEncodingCode());
    }
}