@Override
        public void process(DocumentPut doc) {
            put.getDocument().setFieldValue("title", extractTitle(put.getDocument().getFieldValue("body").toString()));
        }
Simple test case for testing that processing of both documents and
document updates works.

@author Einar M R Rosenvinge
docproc/src/test/java/com/yahoo/docproc/ProcessingUpdateTestCase.java