Function test_use_cftime_true

xarray/tests/test_backends.py:7115–7140

(calendar, units_year)

@pytest.mark.parametrize("calendar", _ALL_CALENDARS)
@pytest.mark.parametrize("units_year", [1500, 2000, 2500])
def test_use_cftime_true(calendar, units_year) -> None:
    import cftime

    x = [0, 1]
    time = [0, 720]
    units = f"days since {units_year}-01-01"
    original = DataArray(x, [("time", time)], name="x").to_dataset()
    for v in ["x", "time"]:
        original[v].attrs["units"] = units
        original[v].attrs["calendar"] = calendar

    decoded_x = cftime.num2date(x, units, calendar, only_use_cftime_datetimes=True)
    decoded_time = cftime.num2date(
        time, units, calendar, only_use_cftime_datetimes=True
    )
    expected_x = DataArray(decoded_x, [("time", decoded_time)], name="x")
    expected_time = DataArray(decoded_time, [("time", decoded_time)], name="time")

    with create_tmp_file() as tmp_file:
        original.to_netcdf(tmp_file)
        with warnings.catch_warnings(record=True) as record:
            decoder = CFDatetimeCoder(use_cftime=True)
            with open_dataset(tmp_file, decode_times=decoder) as ds:
                assert_identical(expected_x, ds.x)
                assert_identical(expected_time, ds.time)
            _assert_no_dates_out_of_range_warning(record)


@requires_scipy_or_netCDF4