import lib

import {
    f_n_minutes_timezone_offset_daylight_saving_time,
    f_b_daylight_saving_time,
    f_s_isotimezone_from_s_timezone,
    f_o_utc_date_components_from_n_ts_ms_and_s_timezone,
    f_s_ymd,
    f_s_dmy,
    f_s_hms,
    f_s_ymd_hms,
    f_s_ts_formatted_from_o_utc_date_components,
    f_s_ts_formatted,
    f_n_ms_offset_from_s_timezone_n_ts_ms
} from "./client.module.js"
// } from "https://deno.land/x/web_datepicker@[version]/mod.js"

search a timezone and get iso string

f_deno_test("f_s_isotimezone_from_s_timezone", () => {
    f_assert_equals(
        f_s_isotimezone_from_s_timezone('Zurich'),
        'Europe/Zurich'
    );

});

check if daylight saving time is on (check if ‘summertime’ is on)

f_deno_test("f_b_daylight_saving_time", () => {
    f_assert_equals(
        f_b_daylight_saving_time(new Date("2023-06-01 10:20:20")),
        true
    );

});

get the timeoffset from a timezone

f_deno_test("f_n_ms_offset_from_s_timezone_n_ts_ms__daylight_saving_time", () => {

    f_assert_equals(
        f_n_ms_offset_from_s_timezone_n_ts_ms(
            'Europe/Zurich', 
            new Date("2023-06-02 00:00:00").getTime()
        ),
        2*60*60*1000
    );

});

get the timeoffset from a timezone (in winter it is one hour less)

f_deno_test("f_n_ms_offset_from_s_timezone_n_ts_ms", () => {

    f_assert_equals(
        f_n_ms_offset_from_s_timezone_n_ts_ms(
            'Europe/Zurich', 
            new Date("2023-01-02 00:00:00").getTime()
        ),
        1*60*60*1000
    );

});

convert a date to YYYY-MM-DD HH:II:SS (by providing a timezone)

let n_ts_ms_utc__2023_06_06_13_14_32 = 1686057272545;

f_deno_test("f_s_ymd__utc", () => {
    f_assert_equals(
        f_s_ymd(
            n_ts_ms_utc__2023_06_06_13_14_32, 
            'UTC'
        ),
        '2023-06-06'
    );
});
f_deno_test("f_s_hms__utc", () => {
    f_assert_equals(
        f_s_hms(
            n_ts_ms_utc__2023_06_06_13_14_32, 
            'UTC'
        ),
        '13:14:32'
    );
});
f_deno_test("f_s_ymd_hms__utc", () => {
    f_assert_equals(
        f_s_ymd_hms(
            n_ts_ms_utc__2023_06_06_13_14_32, 
            'UTC'
        ),
        '2023-06-06 13:14:32'
    );
});

f_deno_test("f_s_ymd", () => {
    f_assert_equals(
        f_s_ymd(
            n_ts_ms_utc__2023_06_06_13_14_32, 
            'Europe/Zurich'
        ),
        '2023-06-06'
    );
});
f_deno_test("f_s_hms", () => {
    f_assert_equals(
        f_s_hms(
            n_ts_ms_utc__2023_06_06_13_14_32, 
            'Europe/Zurich'
        ),
        '15:14:32'
    );
});
f_deno_test("f_s_ymd_hms", () => {
    f_assert_equals(
        f_s_ymd_hms(
            n_ts_ms_utc__2023_06_06_13_14_32, 
            'Europe/Zurich'
        ),
        '2023-06-06 15:14:32'
    );
});