import unittest
from tudelft.utilities.listener.DefaultListenable import DefaultListenable
from tudelft.utilities.tools.Iterator import hasNext

class DefaultListenableTest(unittest.TestCase):
	
	def test_Iterator(self):
		it=iter([1,2,3])
		result=[]
		while (t:=hasNext(it)) and (it:=t[1]) and t[0]:
			nxt=next(it)
			print(nxt)
			result.append(nxt)
		self.assertEqual(3, len(result))