public function testBuildTrigrams() { $indexer = new TNTIndexer(); $trigrams = $indexer->buildTrigrams('created'); $this->assertEquals('__c _cr cre rea eat ate ted ed_ d__', $trigrams); $trigrams = $indexer->buildTrigrams('mood'); $this->assertEquals('__m _mo moo ood od_ d__', $trigrams); $trigrams = $indexer->buildTrigrams('death'); $this->assertEquals('__d _de dea eat ath th_ h__', $trigrams); $trigrams = $indexer->buildTrigrams('behind'); $this->assertEquals('__b _be beh ehi hin ind nd_ d__', $trigrams); $trigrams = $indexer->buildTrigrams('usually'); $this->assertEquals('__u _us usu sua ual all lly ly_ y__', $trigrams); $trigrams = $indexer->buildTrigrams('created'); $this->assertEquals('__c _cr cre rea eat ate ted ed_ d__', $trigrams); }