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(); }