Add method to calculate the neares time

src/helpers/time/calculateNearestTime.js

@@ -0,0 +1,21 @@
+export function calculateNearestTime(currentDate = new Date()) {
+	if (currentDate.getHours() <= 9 || currentDate.getHours() > 21) {
+		return 9
+	}
+
+	if (currentDate.getHours() <= 12) {
+		return 12
+	}
+
+	if (currentDate.getHours() <= 15) {
+		return 15
+	}
+
+	if (currentDate.getHours() <= 18) {
+		return 18
+	}
+
+	if (currentDate.getHours() <= 21) {
+		return 21
+	}
+}

src/helpers/time/calculateNearestTime.test.js

@@ -0,0 +1,90 @@
+import {calculateNearestTime} from './calculateNearestTime'
+
+test('5:00', () => {
+	const date = new Date()
+	date.setHours(5)
+	expect(calculateNearestTime(date)).toBe(9)
+})
+
+test('7:00', () => {
+	const date = new Date()
+	date.setHours(7)
+	expect(calculateNearestTime(date)).toBe(9)
+})
+
+test('7:41', () => {
+	const date = new Date()
+	date.setHours(7)
+	date.setMinutes(41)
+	expect(calculateNearestTime(date)).toBe(9)
+})
+
+test('9:00', () => {
+	const date = new Date()
+	date.setHours(9)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(9)
+})
+
+test('10:00', () => {
+	const date = new Date()
+	date.setHours(10)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(12)
+})
+
+test('12:00', () => {
+	const date = new Date()
+	date.setHours(12)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(12)
+})
+
+test('13:00', () => {
+	const date = new Date()
+	date.setHours(13)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(15)
+})
+
+test('15:00', () => {
+	const date = new Date()
+	date.setHours(15)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(15)
+})
+
+test('16:00', () => {
+	const date = new Date()
+	date.setHours(16)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(18)
+})
+
+test('18:00', () => {
+	const date = new Date()
+	date.setHours(18)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(18)
+})
+
+test('19:00', () => {
+	const date = new Date()
+	date.setHours(19)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(21)
+})
+
+test('22:00', () => {
+	const date = new Date()
+	date.setHours(22)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(9)
+})
+
+test('22:40', () => {
+	const date = new Date()
+	date.setHours(22)
+	date.setMinutes(0)
+	expect(calculateNearestTime(date)).toBe(9)
+})