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package org.spongycastle.asn1.test;
import java.io.IOException;
import java.util.Random;
import org.spongycastle.asn1.ASN1InputStream;
import org.spongycastle.asn1.ASN1OctetString;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.icao.DataGroupHash;
import org.spongycastle.util.test.SimpleTest;
public class DataGroupHashUnitTest
extends SimpleTest
{
public String getName()
{
return "DataGroupHash";
}
private byte[] generateHash()
{
Random rand = new Random();
byte[] bytes = new byte[20];
for (int i = 0; i != bytes.length; i++)
{
bytes[i] = (byte)rand.nextInt();
}
return bytes;
}
public void performTest()
throws Exception
{
int dataGroupNumber = 1;
ASN1OctetString dataHash = new DEROctetString(generateHash());
DataGroupHash dg = new DataGroupHash(dataGroupNumber, dataHash);
checkConstruction(dg, dataGroupNumber, dataHash);
try
{
DataGroupHash.getInstance(null);
}
catch (Exception e)
{
fail("getInstance() failed to handle null.");
}
try
{
DataGroupHash.getInstance(new Object());
fail("getInstance() failed to detect bad object.");
}
catch (IllegalArgumentException e)
{
// expected
}
}
private void checkConstruction(
DataGroupHash dg,
int dataGroupNumber,
ASN1OctetString dataGroupHashValue)
throws IOException
{
checkValues(dg, dataGroupNumber, dataGroupHashValue);
dg = DataGroupHash.getInstance(dg);
checkValues(dg, dataGroupNumber, dataGroupHashValue);
ASN1InputStream aIn = new ASN1InputStream(dg.toASN1Object().getEncoded());
ASN1Sequence seq = (ASN1Sequence)aIn.readObject();
dg = DataGroupHash.getInstance(seq);
checkValues(dg, dataGroupNumber, dataGroupHashValue);
}
private void checkValues(
DataGroupHash dg,
int dataGroupNumber,
ASN1OctetString dataGroupHashValue)
{
if (dg.getDataGroupNumber() != dataGroupNumber)
{
fail("group number don't match.");
}
if (!dg.getDataGroupHashValue().equals(dataGroupHashValue))
{
fail("hash value don't match.");
}
}
public static void main(
String[] args)
{
runTest(new DataGroupHashUnitTest());
}
}
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