def test_split_large(self, size):
        s = ' a' * size + ' '
        l = s.split()
        self.assertEquals(len(l), size)
        self.assertEquals(set(l), set(['a']))
        del l
        l = s.split('a')
        self.assertEquals(len(l), size + 1)
        self.assertEquals(set(l), set([' ']))