public function testStem()
{
$input_handle = fopen('./resources/words/input.txt', 'r');
$output_handle = fopen('./resources/words/output.txt', 'r');
while ($in_word = trim(fgets($input_handle))) {
$out_word = trim(fgets($output_handle));
$this->assertEquals($out_word, fGrammar::stem($in_word));
}
}