public virtual void TestToString()
{
StopAnalyzer analyzer = new StopAnalyzer();
StopFilter.SetEnablePositionIncrementsDefault(true);
QueryParser qp = new QueryParser("field", analyzer);
qp.SetEnablePositionIncrements(true);
PhraseQuery q = (PhraseQuery)qp.Parse("\"this hi this is a test is\"");
Assert.AreEqual("field:\"? hi ? ? ? test\"", q.ToString());
q.Add(new Term("field", "hello"), 1);
Assert.AreEqual("field:\"? hi|hello ? ? ? test\"", q.ToString());
}