def test_readline(self):
t = Tokenizer()
l1 = "linea1\n"
l2 = "linea2\n"
l3 = "linea3"
s = "{}{}{}".format(l1, l2, l3)
f = StringIO(s)
t.init(f)
g = t.lines()
self.assertEquals(l1, g.next())
self.assertEquals(l2, g.next())
self.assertEquals(l3 + "\n", g.next())
