import { isDateValid } from '../index'
import { describe, it, expect } from 'vitest'

describe('isDateValid', () => {
	it('returns an error when the date is not valid', () => {
		const date = '99/99/9999'

		expect(typeof isDateValid(date)).toBe('string')
	})

	it('returns an error when the format is invalid', () => {
		const date = '2020-04-16'

		expect(typeof isDateValid(date)).toBe('string')
	})

	it('returns an error when the day does not match the month', () => {
		const date = '31/11/2019' // Only 30 days in November

		expect(typeof isDateValid(date)).toBe('string')
	})

	it('returns an error when it is february (not leap year) and the day does not match the month', () => {
		const date = '29/02/2019' // Not a leap year, only 28 days

		expect(typeof isDateValid(date)).toBe('string')
	})

	it('returns an error when it is february (leap year) and the day does not match the month', () => {
		const date = '30/02/2020' // Leap year, 29 days

		expect(typeof isDateValid(date)).toBe('string')
	})

	it('returns true when it is february and the date is valid', () => {
		const date = '15/02/2019'

		expect(isDateValid(date)).toBe(true)
	})

	it('returns true when the date is valid', () => {
		const date = '14/09/2019'

		expect(isDateValid(date)).toBe(true)
	})
})