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TypeScript

import { describe, expect, test } from 'vitest';
import { dateToDiscordISOTimestamp } from '../src/utils/optimization.js';
describe('dateToDiscordISOTimestamp', () => {
test('zero-pads milliseconds below 100', () => {
// 5ms is .005000, not .500000
expect(dateToDiscordISOTimestamp(new Date(Date.UTC(2_024, 0, 1, 0, 0, 0, 5)))).toBe(
'2024-01-01T00:00:00.005000+00:00',
);
expect(dateToDiscordISOTimestamp(new Date(Date.UTC(2_024, 0, 1, 0, 0, 0, 42)))).toBe(
'2024-01-01T00:00:00.042000+00:00',
);
expect(dateToDiscordISOTimestamp(new Date(Date.UTC(2_024, 0, 1, 0, 0, 0, 0)))).toBe(
'2024-01-01T00:00:00.000000+00:00',
);
});
test('round-trips every millisecond value', () => {
for (const ms of [0, 1, 9, 10, 50, 99, 100, 500, 999]) {
const date = new Date(Date.UTC(2_024, 5, 15, 12, 30, 45, ms));
expect(new Date(dateToDiscordISOTimestamp(date)).getTime()).toBe(date.getTime());
}
});
});