fix(Google Calendar Node): Updates and fixes (#10715)

Co-authored-by: Shireen Missi <94372015+ShireenMissi@users.noreply.github.com>

packages/nodes-base/nodes/Google/Calendar/test/GeneircFunctions.test.ts

@@ -1,4 +1,7 @@
-import { addTimezoneToDate } from '../GenericFunctions';
+import { DateTime } from 'luxon';
+
+import type { RecurringEventInstance } from '../EventInterface';
+import { addTimezoneToDate, dateObjectToISO, eventExtendYearIntoFuture } from '../GenericFunctions';
 
 describe('addTimezoneToDate', () => {
 	it('should add timezone to date', () => {
@@ -18,3 +21,87 @@ describe('addTimezoneToDate', () => {
 		expect(result4).toBe('2021-09-01T12:00:00.000+08:00');
 	});
 });
+
+describe('dateObjectToISO', () => {
+	test('should return ISO string for DateTime instance', () => {
+		const mockDateTime = DateTime.fromISO('2025-01-07T12:00:00');
+		const result = dateObjectToISO(mockDateTime);
+		expect(result).toBe('2025-01-07T12:00:00.000+00:00');
+	});
+
+	test('should return ISO string for Date instance', () => {
+		const mockDate = new Date('2025-01-07T12:00:00Z');
+		const result = dateObjectToISO(mockDate);
+		expect(result).toBe('2025-01-07T12:00:00.000Z');
+	});
+
+	test('should return string when input is not a DateTime or Date instance', () => {
+		const inputString = '2025-01-07T12:00:00';
+		const result = dateObjectToISO(inputString);
+		expect(result).toBe(inputString);
+	});
+});
+
+describe('eventExtendYearIntoFuture', () => {
+	const timezone = 'UTC';
+
+	it('should return true if any event extends into the next year', () => {
+		const events = [
+			{
+				recurringEventId: '123',
+				start: { dateTime: '2026-01-01T00:00:00Z', date: null },
+			},
+		] as unknown as RecurringEventInstance[];
+
+		const result = eventExtendYearIntoFuture(events, timezone, 2025);
+		expect(result).toBe(true);
+	});
+
+	it('should return false if no event extends into the next year', () => {
+		const events = [
+			{
+				recurringEventId: '123',
+				start: { dateTime: '2025-12-31T23:59:59Z', date: null },
+			},
+		] as unknown as RecurringEventInstance[];
+
+		const result = eventExtendYearIntoFuture(events, timezone, 2025);
+		expect(result).toBe(false);
+	});
+
+	it('should return false for invalid event start dates', () => {
+		const events = [
+			{
+				recurringEventId: '123',
+				start: { dateTime: 'invalid-date', date: null },
+			},
+		] as unknown as RecurringEventInstance[];
+
+		const result = eventExtendYearIntoFuture(events, timezone, 2025);
+		expect(result).toBe(false);
+	});
+
+	it('should return false for events without a recurringEventId', () => {
+		const events = [
+			{
+				recurringEventId: null,
+				start: { dateTime: '2025-01-01T00:00:00Z', date: null },
+			},
+		] as unknown as RecurringEventInstance[];
+
+		const result = eventExtendYearIntoFuture(events, timezone, 2025);
+		expect(result).toBe(false);
+	});
+
+	it('should handle events with only a date and no time', () => {
+		const events = [
+			{
+				recurringEventId: '123',
+				start: { dateTime: null, date: '2026-01-01' },
+			},
+		] as unknown as RecurringEventInstance[];
+
+		const result = eventExtendYearIntoFuture(events, timezone, 2025);
+		expect(result).toBe(true);
+	});
+});