import java.util.List;
import junit.framework.*; 
import org.custommonkey.xmlunit.*;

public class XmlAssertions {

    private static final String ERROR_MSG = "XML comparison failure. \nExpected: %s\nReceived: %s\n%s"; 

    static {
         XMLUnit.setIgnoreWhitespace(true);
    }

    public static void assertXmlSimilar(String expected, String actual) {
        try {
            Diff diff = new Diff(expected, actual);
            List differences = new DetailedDiff(diff).getAllDifferences();
            Assert.assertTrue(
                String.format(ERROR_MSG, expected, actual, differences), 
                diff.similar());
        } catch (Exception ex) {
             Assert.fail(String.format(ERROR_MSG, expected, actual, ex.getMessage())); 
        }
    }
    
    public static void main(String[] args) {
        XmlAssertions.assertXmlSimilar("<root/>", "<root></root>"); 
        XmlAssertions.assertXmlSimilar("<root>data</root>", "<root>\ndata\n</root>\n"); 

        try {
            XmlAssertions.assertXmlSimilar("<root>data</root>", "<root/>"); 
        } catch (AssertionFailedError ignored) {
            //expected
        }

        System.out.println("Success on XmlAssertions"); 
    }
}