public function testPop()
{
$input = new ParseInput(array('a', 'a', 'b', 'b'));
$this->assertEquals('a', $input->peek());
$this->assertEquals('a', $input->peek(1));
$this->assertEquals('b', $input->peek(2));
$this->assertEquals('b', $input->peek(3));
$this->assertNull($input->peek(4));
$this->assertEquals('a', $input->pop());
$this->assertEquals('a', $input->peek());
$this->assertEquals('b', $input->peek(1));
$this->assertEquals('b', $input->peek(2));
$this->assertNull($input->peek(3));
$input->expect('a');
$this->assertEquals(array('b', 'b'), $input->toArray());
$input->reset();
$this->assertEquals(array('a', 'a', 'b', 'b'), $input->toArray());
}
