import dayjs from 'dayjs';
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import timezone from 'dayjs/plugin/timezone.js';
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import utc from 'dayjs/plugin/utc.js';
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import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
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import {
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formatDate,
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formatDateTime,
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getCurrentTimezone,
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getSystemTimezone,
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isDate,
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isDayjsObject,
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setCurrentTimezone,
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} from '../date';
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dayjs.extend(utc);
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dayjs.extend(timezone);
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describe('dateUtils', () => {
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const sampleISO = '2024-10-30T12:34:56Z';
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const sampleTimestamp = Date.parse(sampleISO);
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beforeEach(() => {
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// 重置时区
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dayjs.tz.setDefault();
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setCurrentTimezone(); // 重置为系统默认
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});
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afterEach(() => {
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vi.restoreAllMocks();
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});
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// ===============================
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// formatDate
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// ===============================
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describe('formatDate', () => {
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it('should format a valid ISO date string', () => {
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const formatted = formatDate(sampleISO, 'YYYY/MM/DD');
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expect(formatted).toMatch(/2024\/10\/30/);
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});
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it('should format a timestamp correctly', () => {
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const formatted = formatDate(sampleTimestamp);
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expect(formatted).toMatch(/2024-10-30/);
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});
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it('should format a Date object', () => {
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const formatted = formatDate(new Date(sampleISO));
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expect(formatted).toMatch(/2024-10-30/);
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});
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it('should format a dayjs object', () => {
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const formatted = formatDate(dayjs(sampleISO));
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expect(formatted).toMatch(/2024-10-30/);
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});
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it('should return original input if date is invalid', () => {
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const invalid = 'not-a-date';
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const spy = vi.spyOn(console, 'error').mockImplementation(() => {});
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const formatted = formatDate(invalid);
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expect(formatted).toBe(invalid);
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expect(spy).toHaveBeenCalledOnce();
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});
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it('should apply given format', () => {
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const formatted = formatDate(sampleISO, 'YYYY-MM-DD HH:mm');
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expect(formatted).toMatch(/\d{4}-\d{2}-\d{2} \d{2}:\d{2}/);
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});
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});
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// ===============================
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// formatDateTime
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// ===============================
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describe('formatDateTime', () => {
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it('should format date into full datetime', () => {
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const result = formatDateTime(sampleISO);
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expect(result).toMatch(/2024-10-30 \d{2}:\d{2}:\d{2}/);
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});
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});
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// ===============================
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// isDate
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// ===============================
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describe('isDate', () => {
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it('should return true for Date instances', () => {
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expect(isDate(new Date())).toBe(true);
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});
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it('should return false for non-Date values', () => {
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expect(isDate('2024-10-30')).toBe(false);
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expect(isDate(null)).toBe(false);
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expect(isDate(undefined)).toBe(false);
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});
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});
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// ===============================
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// isDayjsObject
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// ===============================
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describe('isDayjsObject', () => {
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it('should return true for dayjs objects', () => {
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expect(isDayjsObject(dayjs())).toBe(true);
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});
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it('should return false for other values', () => {
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expect(isDayjsObject(new Date())).toBe(false);
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expect(isDayjsObject('string')).toBe(false);
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});
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});
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// ===============================
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// getSystemTimezone
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// ===============================
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describe('getSystemTimezone', () => {
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it('should return a valid IANA timezone string', () => {
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const tz = getSystemTimezone();
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expect(typeof tz).toBe('string');
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expect(tz).toMatch(/^[A-Z]+\/[A-Z_]+/i);
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});
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});
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// ===============================
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// setCurrentTimezone / getCurrentTimezone
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// ===============================
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describe('setCurrentTimezone & getCurrentTimezone', () => {
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it('should set and retrieve the current timezone', () => {
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setCurrentTimezone('Asia/Shanghai');
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expect(getCurrentTimezone()).toBe('Asia/Shanghai');
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});
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it('should reset to system timezone when called with no args', () => {
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const guessed = getSystemTimezone();
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setCurrentTimezone();
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expect(getCurrentTimezone()).toBe(guessed);
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});
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it('should update dayjs default timezone', () => {
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setCurrentTimezone('America/New_York');
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const d = dayjs('2024-01-01T00:00:00Z');
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// 校验时区转换生效（小时变化）
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expect(d.tz().format('HH')).not.toBe('00');
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});
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});
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});
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