public function testFields() {
		$query = new Query($this->_queryArr);

		$expected = array('id','author_id','title');
		$result = $query->fields();
		$this->assertEqual($expected, $result);

		$query->fields('content');

		$expected = array('id','author_id','title','content');
		$result = $query->fields();
		$this->assertEqual($expected, $result);

		$query->fields(array('updated','created'));

		$expected = array('id','author_id','title','content','updated','created');
		$result = $query->fields();
		$this->assertEqual($expected, $result);

		$query->fields(false);
		$query->fields(array('id', 'title'));

		$expected = array('id','title');
		$result = $query->fields();
		$this->assertEqual($expected, $result);
	}