import pytest

from pandas import Timestamp

ts_no_ns = Timestamp(
    year=2019,
    month=5,
    day=18,
    hour=15,
    minute=17,
    second=8,
    microsecond=132263,
)
ts_no_ns_year1 = Timestamp(
    year=1,
    month=5,
    day=18,
    hour=15,
    minute=17,
    second=8,
    microsecond=132263,
)
ts_ns = Timestamp(
    year=2019,
    month=5,
    day=18,
    hour=15,
    minute=17,
    second=8,
    microsecond=132263,
    nanosecond=123,
)
ts_ns_tz = Timestamp(
    year=2019,
    month=5,
    day=18,
    hour=15,
    minute=17,
    second=8,
    microsecond=132263,
    nanosecond=123,
    tz="UTC",
)
ts_no_us = Timestamp(
    year=2019,
    month=5,
    day=18,
    hour=15,
    minute=17,
    second=8,
    microsecond=0,
    nanosecond=123,
)


@pytest.mark.parametrize(
    "ts, timespec, expected_iso",
    [
        (ts_no_ns, "auto", "2019-05-18T15:17:08.132263"),
        (ts_no_ns, "seconds", "2019-05-18T15:17:08"),
        (ts_no_ns, "nanoseconds", "2019-05-18T15:17:08.132263000"),
        (ts_no_ns_year1, "seconds", "0001-05-18T15:17:08"),
        (ts_no_ns_year1, "nanoseconds", "0001-05-18T15:17:08.132263000"),
        (ts_ns, "auto", "2019-05-18T15:17:08.132263123"),
        (ts_ns, "hours", "2019-05-18T15"),
        (ts_ns, "minutes", "2019-05-18T15:17"),
        (ts_ns, "seconds", "2019-05-18T15:17:08"),
        (ts_ns, "milliseconds", "2019-05-18T15:17:08.132"),
        (ts_ns, "microseconds", "2019-05-18T15:17:08.132263"),
        (ts_ns, "nanoseconds", "2019-05-18T15:17:08.132263123"),
        (ts_ns_tz, "auto", "2019-05-18T15:17:08.132263123+00:00"),
        (ts_ns_tz, "hours", "2019-05-18T15+00:00"),
        (ts_ns_tz, "minutes", "2019-05-18T15:17+00:00"),
        (ts_ns_tz, "seconds", "2019-05-18T15:17:08+00:00"),
        (ts_ns_tz, "milliseconds", "2019-05-18T15:17:08.132+00:00"),
        (ts_ns_tz, "microseconds", "2019-05-18T15:17:08.132263+00:00"),
        (ts_ns_tz, "nanoseconds", "2019-05-18T15:17:08.132263123+00:00"),
        (ts_no_us, "auto", "2019-05-18T15:17:08.000000123"),
    ],
)
def test_isoformat(ts, timespec, expected_iso):
    assert ts.isoformat(timespec=timespec) == expected_iso