63 lines
2.3 KiB
TypeScript
63 lines
2.3 KiB
TypeScript
import {describe, expect, it} from 'vitest'
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import {formatIsoToDisplay, isDateInRange, isValidIso, parseDisplayToIso} from './dateFormat'
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describe('dateFormat', () => {
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describe('isValidIso', () => {
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it('accepts a real ISO date', () => {
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expect(isValidIso('2026-05-19')).toBe(true)
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})
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it('rejects a malformed string', () => {
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expect(isValidIso('19/05/2026')).toBe(false)
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expect(isValidIso('2026-5-9')).toBe(false)
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expect(isValidIso('')).toBe(false)
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})
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it('rejects an impossible date', () => {
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expect(isValidIso('2026-02-30')).toBe(false)
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expect(isValidIso('2026-13-01')).toBe(false)
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})
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it('accepts Feb 29 on a leap year and rejects it otherwise', () => {
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expect(isValidIso('2024-02-29')).toBe(true)
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expect(isValidIso('2026-02-29')).toBe(false)
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})
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})
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describe('formatIsoToDisplay', () => {
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it('formats ISO to DD/MM/YYYY', () => {
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expect(formatIsoToDisplay('2026-05-19')).toBe('19/05/2026')
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})
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it('returns empty string for null or invalid input', () => {
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expect(formatIsoToDisplay(null)).toBe('')
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expect(formatIsoToDisplay('nope')).toBe('')
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})
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})
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describe('parseDisplayToIso', () => {
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it('parses DD/MM/YYYY to ISO', () => {
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expect(parseDisplayToIso('19/05/2026')).toBe('2026-05-19')
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})
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it('returns null for malformed or impossible input', () => {
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expect(parseDisplayToIso('2026-05-19')).toBeNull()
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expect(parseDisplayToIso('31/02/2026')).toBeNull()
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expect(parseDisplayToIso('')).toBeNull()
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})
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})
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describe('isDateInRange', () => {
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it('returns true when no bounds are given', () => {
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expect(isDateInRange('2026-05-19')).toBe(true)
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})
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it('respects the min bound (inclusive)', () => {
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expect(isDateInRange('2026-05-19', '2026-05-19')).toBe(true)
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expect(isDateInRange('2026-05-18', '2026-05-19')).toBe(false)
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})
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it('respects the max bound (inclusive)', () => {
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expect(isDateInRange('2026-05-19', undefined, '2026-05-19')).toBe(true)
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expect(isDateInRange('2026-05-20', undefined, '2026-05-19')).toBe(false)
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})
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it('respects both bounds', () => {
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expect(isDateInRange('2026-05-15', '2026-05-10', '2026-05-20')).toBe(true)
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expect(isDateInRange('2026-05-25', '2026-05-10', '2026-05-20')).toBe(false)
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})
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})
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})
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