MCP Time Server Node

import { setTimeInTimezone, addDaysInTimezone, isTimeInFuture, } from '../../../src/tools/recurrence/TimezoneDateBuilder'; describe('TimezoneDateBuilder', () => { describe('setTimeInTimezone', () => { it('should set time in UTC when timezone is UTC', () => { const date = new Date('2025-01-15T10:30:00Z'); const result = setTimeInTimezone(date, 14, 30, 'UTC'); expect(result.toISOString()).toBe('2025-01-15T14:30:00.000Z'); expect(result.getUTCHours()).toBe(14); expect(result.getUTCMinutes()).toBe(30); expect(result.getUTCSeconds()).toBe(0); expect(result.getUTCMilliseconds()).toBe(0); }); it('should set time in UTC when timezone is empty string', () => { const date = new Date('2025-01-15T10:30:00Z'); const result = setTimeInTimezone(date, 9, 15, ''); expect(result.toISOString()).toBe('2025-01-15T09:15:00.000Z'); }); it('should set time in specified timezone', () => { const date = new Date('2025-01-15T10:30:00Z'); // Set to 14:30 New York time const result = setTimeInTimezone(date, 14, 30, 'America/New_York'); // 14:30 NY time in January (EST) is 19:30 UTC expect(result.toISOString()).toBe('2025-01-15T19:30:00.000Z'); }); it('should handle different timezone conversions', () => { const date = new Date('2025-01-15T10:30:00Z'); // Tokyo is UTC+9 const tokyoResult = setTimeInTimezone(date, 14, 30, 'Asia/Tokyo'); // 14:30 Tokyo time is 05:30 UTC expect(tokyoResult.toISOString()).toBe('2025-01-15T05:30:00.000Z'); // London in January is UTC+0 const londonResult = setTimeInTimezone(date, 14, 30, 'Europe/London'); expect(londonResult.toISOString()).toBe('2025-01-15T14:30:00.000Z'); }); it('should preserve the date when setting time', () => { const date = new Date('2025-01-20T23:59:59Z'); // Set early morning time const result = setTimeInTimezone(date, 6, 0, 'UTC'); // Should still be Jan 20 expect(result.toISOString()).toBe('2025-01-20T06:00:00.000Z'); }); it('should handle midnight correctly', () => { const date = new Date('2025-01-15T15:00:00Z'); const result = setTimeInTimezone(date, 0, 0, 'UTC'); expect(result.toISOString()).toBe('2025-01-15T00:00:00.000Z'); }); it('should handle end of day correctly', () => { const date = new Date('2025-01-15T10:00:00Z'); const result = setTimeInTimezone(date, 23, 59, 'UTC'); expect(result.toISOString()).toBe('2025-01-15T23:59:00.000Z'); }); }); describe('addDaysInTimezone', () => { it('should add days preserving time in UTC', () => { const date = new Date('2025-01-15T14:30:00Z'); const result = addDaysInTimezone(date, 3, 'UTC'); expect(result.toISOString()).toBe('2025-01-18T14:30:00.000Z'); }); it('should add days preserving time in timezone', () => { // Start with a UTC time that represents 9:00 AM NY time const date = new Date('2025-01-15T14:00:00Z'); // 9:00 AM EST const result = addDaysInTimezone(date, 1, 'America/New_York'); // Should still be 9:00 AM NY time next day (14:00 UTC) expect(result.toISOString()).toBe('2025-01-16T14:00:00.000Z'); }); it('should handle DST transitions when adding days', () => { // Day before DST starts in US (March 9, 2025) // 9:00 AM EST = 14:00 UTC const beforeDST = new Date('2025-03-08T14:00:00Z'); const result = addDaysInTimezone(beforeDST, 2, 'America/New_York'); // After DST, 9:00 AM EDT = 13:00 UTC (1 hour earlier) expect(result.toISOString()).toBe('2025-03-10T13:00:00.000Z'); }); }); describe('isTimeInFuture', () => { it('should return true when time is in future', () => { const now = new Date('2025-01-15T10:30:00Z'); const future = new Date('2025-01-15T14:30:00Z'); const result = isTimeInFuture(future, now); expect(result).toBe(true); }); it('should return false when time is in past', () => { const now = new Date('2025-01-15T10:30:00Z'); const past = new Date('2025-01-15T09:30:00Z'); const result = isTimeInFuture(past, now); expect(result).toBe(false); }); it('should return false when times are equal', () => { const now = new Date('2025-01-15T10:30:00Z'); const same = new Date('2025-01-15T10:30:00Z'); const result = isTimeInFuture(same, now); expect(result).toBe(false); }); }); });