feat(jest): increase coverage for time utilities

utilities/Timezone.test.ts

@@ -1,7 +1,7 @@
 import * as Timezone from './Timezone'
 
-describe('init', () => {
-  test.skip('getTimezoneDropdowns', () => {
+describe('Test utilities/timezone', () => {
+  test('getTimezoneDropdowns for Singapore', () => {
     const result = Timezone.getTimezoneDropdowns()
     const nonDaylightTimezone = result.find((obj) => {
       return obj.alternativeName === 'Singapore Time'

utilities/duration.test.ts

@@ -0,0 +1,25 @@
+import { formatDuration } from '~/utilities/duration'
+
+Date.now = jest.fn(() => 1656069280)
+// Date.setSeconds = jest.fn(() => 1656069280)
+let localDate: number
+
+describe('Test utilities/duration', () => {
+  beforeAll(() => {
+    localDate = Date.now()
+  })
+  test('call with latest date', () => {
+    // const argument = localDate.now() // Get unix timestamp
+
+    const result: any = formatDuration(localDate)
+    expect(result).toEqual('59:14:40')
+  })
+  test('call with 45 seconds date', () => {
+    const rawDate = new Date()
+    const argument = rawDate.setSeconds(45) // Returns unix timestamp
+
+    const result: any = formatDuration(argument)
+    expect(result).not.toEqual('59:14:40') // Because date is not what we defaulted above
+    expect(typeof result).toBe('string')
+  })
+})