public function testMergeComments()
{
$item = array('id' => 'test', 'comments' => array('a'));
$data = $this->adapter->merge(array(), $item);
$item = array('id' => 'test', 'comments' => array('b'));
$expected = array('test' => array('id' => 'test', 'ids' => array(), 'translated' => null, 'flags' => array(), 'comments' => array('a', 'b'), 'occurrences' => array()));
$result = $this->adapter->merge($data, $item);
$this->assertEqual($expected, $result);
}