private Set parseSingleSource(String source) throws IOException {
MockArchivalUnit mau = new MockArchivalUnit();
LinkExtractor ue = new RegexpCssLinkExtractor();
mau.setLinkExtractor("text/css", ue);
MockCachedUrl mcu = new MockCachedUrl("http://www.example.com", mau);
mcu.setContent(source);
cb.reset();
extractor.extractUrls(mau, new StringInputStream(source), ENC, "http://www.example.com", cb);
return cb.getFoundUrls();
}
