Compare two XML strings ignoring element order

Question

Suppose I have two xml strings

  a
  b



  b         


        

Answer 1

Just as an example of how to compare more complex xml elements matching based on equality of attribute name. For instance:

vs.

With following custom element qualifier:

final Diff diff = XMLUnit.compareXML(controlXml, testXml);
diff.overrideElementQualifier(new ElementNameAndTextQualifier() {

    @Override
    public boolean qualifyForComparison(final Element control, final Element test) {
        // this condition is copied from super.super class
        if (!(control != null && test != null
                      && equalsNamespace(control, test)
                      && getNonNamespacedNodeName(control).equals(getNonNamespacedNodeName(test)))) {
            return false;
        }

        // matching based on 'name' attribute
        if (control.hasAttribute("name") && test.hasAttribute("name")) {
            if (control.getAttribute("name").equals(test.getAttribute("name"))) {
                return true;
            }
        }
        return false;
    }
});
XMLAssert.assertXMLEqual(diff, true);