public function testExplicitSet()
{
$doc = new Document();
$doc->set(array('_id' => 4));
$doc->set(array('name' => 'Four'));
$doc->set(array('content' => 'Lorem ipsum four'));
$expected = array('_id' => 4, 'name' => 'Four', 'content' => 'Lorem ipsum four');
$result = $doc->data();
$this->assertEqual($expected, $result);
}