public void testClear() { TagExtractor extractor = new TagExtractor("abstract", 10); extractor.SetTag("abstract"); extractor.Add("This is a sample text."); Assert.AreEqual(extractor.buf_.ToString(), "This is a sample text."); Assert.AreEqual(extractor.tag_, "abstract"); extractor.Clear(); Assert.AreEqual(extractor.buf_.ToString(), ""); Assert.AreEqual(extractor.tag_, null); }