BibtexEntry e = (BibtexEntry) c.iterator().next();
XMPUtil.writeXMP(pdfFile, e, null);
XMPMetadata metadata = XMPUtil.readRawXMP(pdfFile);
List<XMPSchema> schemas = metadata.getSchemas();
assertEquals(2, schemas.size());
schemas = metadata.getSchemasByNamespaceURI(XMPSchemaBibtex.NAMESPACE);
assertEquals(1, schemas.size());
XMPSchemaBibtex bib = (XMPSchemaBibtex) schemas.get(0);
List<String> authors = bib.getSequenceList("author");
assertEquals(4, authors.size());