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test: add formatters utils tests (#892)
authored by
James Garbutt
and committed by
GitHub
eaf624d0
1f9a9f59
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test/unit/app/utils/formatters.spec.ts
+107
test/unit/app/utils/formatters.spec.ts
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import { describe, expect, it } from 'vitest'
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import {
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decodeHtmlEntities,
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formatBytes,
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formatCompactNumber,
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toIsoDateString,
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} from '../../../../app/utils/formatters'
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describe('toIsoDateString', () => {
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it('formats a date as YYYY-MM-DD', () => {
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expect(toIsoDateString(new Date('2024-03-15T00:00:00Z'))).toBe('2024-03-15')
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})
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it('pads single-digit month and day', () => {
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expect(toIsoDateString(new Date('2024-01-05T00:00:00Z'))).toBe('2024-01-05')
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})
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})
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describe('decodeHtmlEntities', () => {
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it.each([
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['&', '&'],
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['<', '<'],
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['>', '>'],
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['"', '"'],
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[''', "'"],
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[''', "'"],
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[' ', ' '],
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] as const)('%s → %s', (input, expected) => {
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expect(decodeHtmlEntities(input)).toBe(expected)
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})
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it('decodes multiple entities in one string', () => {
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expect(decodeHtmlEntities('a & b < c')).toBe('a & b < c')
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})
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it('leaves plain text unchanged', () => {
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expect(decodeHtmlEntities('say no to bloat')).toBe('say no to bloat')
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})
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it('leaves unknown entities unchanged', () => {
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expect(decodeHtmlEntities('&unknown;')).toBe('&unknown;')
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})
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})
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describe('formatCompactNumber', () => {
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describe('without options', () => {
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it.each([
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[0, '0'],
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[1, '1'],
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[999, '999'],
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[1000, '1k'],
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[1500, '2k'],
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[10000, '10k'],
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[1000000, '1M'],
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[2500000, '3M'],
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[1000000000, '1B'],
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[1000000000000, '1T'],
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] as const)('%d → %s', (input, expected) => {
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expect(formatCompactNumber(input)).toBe(expected)
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})
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})
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describe('with decimals', () => {
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it.each([
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[1500, 1, '1.5k'],
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[1234567, 2, '1.23M'],
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[1200000, 1, '1.2M'],
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[1000, 2, '1k'],
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] as const)('%d with %d decimals', (input, decimals, expected) => {
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expect(formatCompactNumber(input, { decimals })).toBe(expected)
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})
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})
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describe('with space', () => {
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it('adds space before suffix', () => {
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expect(formatCompactNumber(1500, { space: true })).toBe('2 k')
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})
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})
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describe('negative values', () => {
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it.each([
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[-1000, '-1k'],
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[-2500000, '-3M'],
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[-42, '-42'],
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] as const)('%d → %s', (input, expected) => {
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expect(formatCompactNumber(input)).toBe(expected)
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})
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})
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it('handles values below 1000', () => {
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expect(formatCompactNumber(500)).toBe('500')
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})
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})
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describe('formatBytes', () => {
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it.each([
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[0, '0 B'],
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[512, '512 B'],
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[1023, '1023 B'],
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[1024, '1.0 kB'],
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[1536, '1.5 kB'],
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[1048576, '1.0 MB'],
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[1572864, '1.5 MB'],
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] as const)('%d → %s', (input, expected) => {
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expect(formatBytes(input)).toBe(expected)
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})
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})