public function testFindingLongestWord()
 {
     $wordList = new WordList();
     $wordList->addWord('a');
     $wordList->addWord('bb');
     $wordList->addWord('c');
     $wordList->addWord('ddd');
     $wordList->addWord('eeee');
     $wordList->addWord('f');
     $this->assertsame('eeee', $wordList->getLongestWord());
 }