Method test_strptime

Lib/test/datetimetester.py:1140–1179

(self)

        self.assertEqual(dt2, dt - days)

    def test_strptime(self):
        inputs = [
            # Basic valid cases
            (date(1998, 2, 3), '1998-02-03', '%Y-%m-%d'),
            (date(2004, 12, 2), '2004-12-02', '%Y-%m-%d'),

            # Edge cases: Leap year
            (date(2020, 2, 29), '2020-02-29', '%Y-%m-%d'),  # Valid leap year date

            # bpo-34482: Handle surrogate pairs
            (date(2004, 12, 2), '2004-12\ud80002', '%Y-%m\ud800%d'),
            (date(2004, 12, 2), '2004\ud80012-02', '%Y\ud800%m-%d'),

            # Month/day variations
            (date(2004, 2, 1), '2004-02', '%Y-%m'),  # No day provided
            (date(2004, 2, 1), '02-2004', '%m-%Y'),  # Month and year swapped

            # Different day-month-year formats
            (date(2004, 12, 2), '02/12/2004', '%d/%m/%Y'),  # Day/Month/Year
            (date(2004, 12, 2), '12/02/2004', '%m/%d/%Y'),  # Month/Day/Year

            # Different separators
            (date(2023, 9, 24), '24.09.2023', '%d.%m.%Y'),  # Dots as separators
            (date(2023, 9, 24), '24-09-2023', '%d-%m-%Y'),  # Dashes
            (date(2023, 9, 24), '2023/09/24', '%Y/%m/%d'),  # Slashes

            # Handling years with fewer digits
            (date(127, 2, 3), '0127-02-03', '%Y-%m-%d'),
            (date(99, 2, 3), '0099-02-03', '%Y-%m-%d'),
            (date(5, 2, 3), '0005-02-03', '%Y-%m-%d'),

            # Variations on ISO 8601 format
            (date(2023, 9, 25), '2023-W39-1', '%G-W%V-%u'),  # ISO week date (Week 39, Monday)
            (date(2023, 9, 25), '2023-268', '%Y-%j'),  # Year and day of the year (Julian)
        ]
        for expected, string, format in inputs:
            with self.subTest(string=string, format=format):
                got = date.strptime(string, format)
                self.assertEqual(expected, got)
                self.assertIs(type(got), date)

    def test_strptime_single_digit(self):
        # bpo-34903: Check that single digit dates are allowed.