def test_are_dates_different(self):
# false
pairs = [("1877-02-26", "bioport"),
("1877", "bwn"), ]
self.assertFalse(Person._are_dates_different(pairs))
pairs = [("1877-02", "bioport"),
("1877", "bwn"), ]
self.assertFalse(Person._are_dates_different(pairs))
pairs = [("1877-02-26", "bioport"),
("1877-02-26", "foo"),
("1877", "bwn"),
("1877", "bar"), ]
self.assertFalse(Person._are_dates_different(pairs))
# true
pairs = [("1877-02-26", "bioport"),
("1877-02-27", "bioport"),
("1877", "bwn"), ]
self.assertTrue(Person._are_dates_different(pairs))
pairs = [("1877-02-26", "bioport"),
("1877-02-26", "bioport"),
("1876", "bwn"), ]
self.assertTrue(Person._are_dates_different(pairs))
