def test_skip_to_peek(self):
ps = ParserStream("abcd")
ps.peek()
ps.peek()
ps.skip_to_peek()
self.assertEqual('c', ps.current())
self.assertEqual('c', ps.current_peek())
self.assertEqual(2, ps.get_peek_index())
self.assertEqual(2, ps.get_index())
ps.peek()
self.assertEqual('c', ps.current())
self.assertEqual('d', ps.current_peek())
self.assertEqual(3, ps.get_peek_index())
self.assertEqual(2, ps.get_index())
ps.next()
self.assertEqual('d', ps.current())
self.assertEqual('d', ps.current_peek())
self.assertEqual(3, ps.get_peek_index())
self.assertEqual(3, ps.get_index())
def test_next(self):
ps = ParserStream("abcd")
self.assertEqual('a', ps.current())
self.assertEqual(0, ps.get_index())
self.assertEqual('b', ps.next())
self.assertEqual('b', ps.current())
self.assertEqual(1, ps.get_index())
self.assertEqual('c', ps.next())
self.assertEqual('c', ps.current())
self.assertEqual(2, ps.get_index())
self.assertEqual('d', ps.next())
self.assertEqual('d', ps.current())
self.assertEqual(3, ps.get_index())
self.assertEqual(None, ps.next())
self.assertEqual(None, ps.current())
self.assertEqual(4, ps.get_index())
def test_reset_peek(self):
ps = ParserStream("abcd")
ps.next()
ps.peek()
ps.peek()
ps.reset_peek()
self.assertEqual('b', ps.current())
self.assertEqual('b', ps.current_peek())
self.assertEqual(1, ps.get_peek_index())
self.assertEqual(1, ps.get_index())
ps.peek()
self.assertEqual('b', ps.current())
self.assertEqual('c', ps.current_peek())
self.assertEqual(2, ps.get_peek_index())
self.assertEqual(1, ps.get_index())
ps.peek()
ps.peek()
ps.peek()
ps.reset_peek()
self.assertEqual('b', ps.current())
self.assertEqual('b', ps.current_peek())
self.assertEqual(1, ps.get_peek_index())
self.assertEqual(1, ps.get_index())
self.assertEqual('c', ps.peek())
self.assertEqual('b', ps.current())
self.assertEqual('c', ps.current_peek())
self.assertEqual(2, ps.get_peek_index())
self.assertEqual(1, ps.get_index())
self.assertEqual('d', ps.peek())
self.assertEqual(None, ps.peek())