Function test_cftime_range

xarray/tests/test_cftime_offsets.py:1240–1274

(
    start, end, periods, freq, inclusive, normalize, calendar, expected_date_args
)

    ids=_id_func,
)
def test_cftime_range(
    start, end, periods, freq, inclusive, normalize, calendar, expected_date_args
):
    date_type = get_date_type(calendar)
    expected_dates = list(starmap(date_type, expected_date_args))

    if isinstance(start, tuple):
        start = date_type(*start)
    if isinstance(end, tuple):
        end = date_type(*end)

    with pytest.warns(FutureWarning):
        result = cftime_range(
            start=start,
            end=end,
            periods=periods,
            freq=freq,
            inclusive=inclusive,
            normalize=normalize,
            calendar=calendar,
        )
    resulting_dates = result.values

    assert isinstance(result, CFTimeIndex)

    if freq is not None:
        np.testing.assert_equal(resulting_dates, expected_dates)
    else:
        # If we create a linear range of dates using cftime.num2date
        # we will not get exact round number dates.  This is because
        # datetime arithmetic in cftime is accurate approximately to
        # 1 millisecond (see https://unidata.github.io/cftime/api.html).
        deltas = resulting_dates - expected_dates
        deltas = np.array([delta.total_seconds() for delta in deltas])
        assert np.max(np.abs(deltas)) < 0.001


def test_date_range_name():