def test_next_int(self):
"""A test of the next_int method of the JavaLikeScanner class."""
scanner = JavaLikeScanner("0 1 23 456\n7\t8 9 test 10")
self.assertEqual(scanner.next_int(), 0)
self.assertEqual(scanner.next_int(), 1)
self.assertEqual(scanner.next_int(), 23)
self.assertEqual(scanner.next_int(), 456)
self.assertEqual(scanner.next_int(), 7)
self.assertEqual(scanner.next_int(), 8)
self.assertEqual(scanner.next_int(), 9)
self.assertEqual(scanner.next_int(), None)
self.assertEqual(scanner.next_int(), None)
scanner = JavaLikeScanner("1 \t2 1.5\t5")
self.assertEqual(scanner.next_int(), 1)
self.assertEqual(scanner.next_int(), 2)
self.assertEqual(scanner.next_int(), None)
self.assertEqual(scanner.next_int(), None)
self.assertEqual(scanner.contents, " 1.5\t5")
scanner = JavaLikeScanner("1\t \t")
self.assertEqual(scanner.next_int(), 1)
self.assertEqual(scanner.next_int(), None)
self.assertEqual(scanner.contents, "\t \t")
scanner = JavaLikeScanner("")
self.assertEqual(scanner.next_int(), None)
