public function testState()
{
$scan = new I\Scanner(new I\StringReader("1+2"), $ctx = new I\Context());
$start = $scan->getState();
$scan->next()->next()->next()->next();
$this->assertSame(I\Scanner::EOF, $scan->type());
$scan->setState($start);
$this->assertSame('1', $scan->next()->token());
$this->assertEquals(array(I\Scanner::CHAR, '+'), $scan->peek());
$this->assertEquals(array(I\Scanner::CHAR, '+'), $scan->peek());
}