def test_is_unique_without_extra(self):
"""Test whether we have uniq chars without additional structure."""
self.assertFalse(strings.is_unique("hello"))
self.assertTrue(strings.is_unique("abc"))
def test_is_unique(self):
"""Test whether we have uniq chars."""
self.assertFalse(strings.is_unique("hello"))
self.assertTrue(strings.is_unique("abc"))
