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27 lines
1.3 KiB
JavaScript
27 lines
1.3 KiB
JavaScript
import { describe, expect, it } from 'vitest';
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import { formatChinaDate } from './utils.js';
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describe('formatChinaDate', () => {
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it('returns the Asia/Shanghai date for a UTC ms at China midnight', () => {
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expect(formatChinaDate(Date.UTC(2026, 4, 7, 16, 0, 0))).toBe('2026-05-08');
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});
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it('returns the same China date for a moment late in the day', () => {
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expect(formatChinaDate(Date.UTC(2026, 4, 8, 14, 0, 0))).toBe('2026-05-08');
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});
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it('formats representative A-share and US-market bars on xueqiu Beijing dates', () => {
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expect(formatChinaDate(Date.UTC(2026, 4, 7, 16, 0, 0))).toBe('2026-05-08');
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expect(formatChinaDate(Date.UTC(2026, 4, 10, 16, 0, 0))).toBe('2026-05-11');
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});
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it('crosses the China day boundary at 16:00 UTC', () => {
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expect(formatChinaDate(Date.UTC(2026, 0, 1, 15, 59, 59))).toBe('2026-01-01');
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expect(formatChinaDate(Date.UTC(2026, 0, 1, 16, 0, 0))).toBe('2026-01-02');
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});
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it('always returns an ISO calendar date string, not a locale-shaped slash date', () => {
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expect(formatChinaDate(Date.UTC(2026, 0, 1, 16, 0, 0))).toMatch(/^\d{4}-\d{2}-\d{2}$/);
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});
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it('returns null for nullish input', () => {
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expect(formatChinaDate(null)).toBeNull();
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expect(formatChinaDate(undefined)).toBeNull();
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});
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});
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