Preon46.java

import org.codehaus.preon.Codec;
import org.codehaus.preon.Codecs;
import org.codehaus.preon.annotation.Bound;
import org.codehaus.preon.annotation.BoundNumber;
import org.codehaus.preon.annotation.If;
import org.junit.Assert;
import org.junit.Test;

public class Preon46 {

    public static class Preon46Problem {

        @Bound
        boolean someflag;
        @Bound
        boolean realflag;
        @If("realflag")
        @BoundNumber(size = "6")
        int num;
    }

    public static class NewlyFoundProblem {

        @Bound
        boolean someflag;
        @Bound
        boolean realflag;
        @If("realflag==1")
        @BoundNumber(size = "6")
        int num;
    }

    private static byte binaryConvert(String s) {
        return (byte) Integer.parseInt(s, 2);
    }

    /*
     * Tests a reported issue where the @If flag was not properly working.
     */
    @Test
    public void testPreon46() throws Exception {



        byte[] data1 = new byte[]{binaryConvert("01010011"), 19};
        byte[] data2 = new byte[]{binaryConvert("00010011"), 0};


        Codec<Preon46Problem> testClassCodec = Codecs.create(Preon46Problem.class);

        Preon46Problem decode;
        
        decode = Codecs.decode(testClassCodec, data1);
        Assert.assertEquals(19, decode.num); // Fails here

        decode = Codecs.decode(testClassCodec, data2);
        Assert.assertEquals(0, decode.num);
    }

    /*
     * Tests a new issue found during experimentation
     */
    @Test
    public void testNewProblem() throws Exception {



        byte[] data1 = new byte[]{binaryConvert("01010011"), 19};
        byte[] data2 = new byte[]{binaryConvert("00010011"), 0};


        Codec<NewlyFoundProblem> testClassCodec = Codecs.create(NewlyFoundProblem.class);

        NewlyFoundProblem decode;

        decode = Codecs.decode(testClassCodec, data1);
        Assert.assertEquals(19, decode.num);  // Fails here, but from NullPointerException in describe step

        decode = Codecs.decode(testClassCodec, data2);
        Assert.assertEquals(0, decode.num);
    }
}