Source
Tests that accepted content-types without a `q` value are sorted in the order they appear in the `HTTP_ACCEPT` header.

Source

						public function testAcceptTypeOrder() {
		$request = new Request(array('env' => array(
			'HTTP_ACCEPT' => 'application/xhtml+xml,text/html'
		)));
		$expected = array('application/xhtml+xml', 'text/html');
		$this->assertEqual($expected, $request->accepts(true));

		$request = new Request(array('env' => array(
			'HTTP_USER_AGENT' => 'Safari',
			'HTTP_ACCEPT' => 'application/xhtml+xml,text/html,text/plain;q=0.9'
		)));
		$expected = array('application/xhtml+xml', 'text/html', 'text/plain');
		$this->assertEqual($expected, $request->accepts(true));
	}