public void testNonExactFirst() throws Exception {
WFSTCompletionLookup suggester = new WFSTCompletionLookup(false);
suggester.build(new TermFreqArrayIterator(new TermFreq[] {
new TermFreq("x y", 20),
new TermFreq("x", 2),
}));
for(int topN=1;topN<4;topN++) {