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/* eslint-disable @typescript-eslint/no-explicit-any */

import { describe, expect, it, vi, beforeEach, afterEach } from 'vitest';

import { getSecondsUntilUTCMidnight, getSecondsUntilMidnightInTimezone } from './time';

describe('getSecondsUntilMidnightInTimezone - Edge Cases & Empty/Missing Inputs Verification', () => {

beforeEach(() => {

vi.useFakeTimers();

});

afterEach(() => {

vi.useRealTimers();

});

it('1. falls back to UTC midnight calculation when tz is completely omitted', () => {

vi.setSystemTime(new Date('2024-06-15T12:00:00.000Z'));

expect(getSecondsUntilMidnightInTimezone()).toBe(getSecondsUntilUTCMidnight());

});

it('2. falls back to UTC midnight calculation when tz is undefined', () => {

vi.setSystemTime(new Date('2024-06-15T18:00:00.000Z'));

expect(getSecondsUntilMidnightInTimezone(undefined)).toBe(getSecondsUntilUTCMidnight());

});

it('3. falls back to UTC midnight calculation when tz is null', () => {

vi.setSystemTime(new Date('2024-06-15T20:30:00.000Z'));

expect(getSecondsUntilMidnightInTimezone(null as any)).toBe(getSecondsUntilUTCMidnight());

});

it('4. falls back to UTC midnight calculation when tz is empty or whitespace string', () => {

vi.setSystemTime(new Date('2024-06-15T23:59:00.000Z'));

expect(getSecondsUntilMidnightInTimezone('')).toBe(getSecondsUntilUTCMidnight());

expect(getSecondsUntilMidnightInTimezone(' ')).toBe(getSecondsUntilUTCMidnight());

});

});