Runs the test case.
Document doc;
Element root;
String tagname;
doc = (Document) load("staff", false);
root = doc.getDocumentElement();
tagname = root.getTagName();
if (("image/svg+xml".equals(getContentType()))) {
assertEquals("svgTagName", "svg", tagname);
} else {
assertEquals("elementGetTagNameAssert", "staff", tagname);
}