Chapter 12. Testing

public class MyMessageTransformTest
{
    @Test
    public void test_transform() throws IOException, SAXException
    {
        Smooks smooks = new Smooks(
            getClass().getResourceAsStream("smooks-config.xml") );

        try {
            Source source = new StreamSource(
                getClass().getResourceAsStream("input-message.xml" ) );
            StringResult result = new StringResult();

            smooks.filterSource(source, result);

            // compare the expected xml with the transformation result.
            XMLUnit.setIgnoreWhitespace( true );
            XMLAssert.assertXMLEqual(
                new InputStreamReader(
                getClass().getResourceAsStream("expected.xml")), 
                new StringReader(result.getResult()));
        } finally {
            smooks.close();
        }
    }
}

<dependency>
    <groupId>xmlunit</groupId>
    <artifactId>xmlunit</artifactId>
    <version>1.1</version>
</dependency>