Files
accounted/lib/invoices/__tests__/contrast-check.test.ts
T
Jakob WennbergandClaude Sonnet 5 ec27228a8e style: remove em/en dashes repo-wide, add CLAUDE.md rule against them (#890)
Em dashes (—) and en dashes (–) had spread across comments, docs, tests,
and a few UI strings, reading as AI-generated boilerplate rather than
house style. Replaced each with punctuation matching its context: colon
for explanatory clauses, comma for asides, plain hyphen for numeric/legal
ranges (e.g. "21-23§"), "to"/"till" for date ranges, parentheses for
paired-dash asides. messages/en.json and messages/sv.json were fixed by
hand together to keep sv/en in sync.

Left untouched where the dash is the functional subject rather than
decorative punctuation: date-range-parser.ts's separator regex,
charset-repair.ts's CP1252 byte-mapping table (and its test), the SIE
encoding mojibake docs, generic-csv.ts's minus-sign normalizer, the
agent system-prompt files that already instruct against em dashes, and
a golden iXBRL test fixture compared byte-for-byte.

Also fixes two bugs surfaced along the way: an off-by-one in
ApiKeysPanel's scope-label split (a leftover from an earlier partial
pass), and a charset-repair test that had lost the literal en-dash it
exists to verify.

Regenerated the agent atom seed migration (skills:generate) since 27
SKILL.md files changed. Added a CLAUDE.md rule against em/en dashes,
with an explicit carve-out for the functional-dash cases above.

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
2026-07-04 15:58:06 +02:00

86 lines
3.1 KiB
TypeScript

import { describe, expect, it } from 'vitest'
import { getContrastRatio, isWcagAACompliant } from '@/lib/invoices/contrast-check'
describe('getContrastRatio', () => {
it('returns 21 for black on white (maximum contrast)', () => {
const ratio = getContrastRatio('#000000', '#ffffff')
expect(ratio).toBeCloseTo(21, 1)
})
it('returns 21 regardless of argument order (white on black)', () => {
const ratio = getContrastRatio('#ffffff', '#000000')
expect(ratio).toBeCloseTo(21, 1)
})
it('returns 1 for identical colors (white on white)', () => {
const ratio = getContrastRatio('#ffffff', '#ffffff')
expect(ratio).toBeCloseTo(1, 5)
})
it('returns 1 for identical colors (black on black)', () => {
const ratio = getContrastRatio('#000000', '#000000')
expect(ratio).toBeCloseTo(1, 5)
})
it('PDF default heading color #1a1a1a on white passes AA with ratio > 15', () => {
const ratio = getContrastRatio('#1a1a1a', '#ffffff')
expect(ratio).toBeGreaterThan(15)
})
it('yellow #ffff00 on white has very low contrast (~1.07), fails AA', () => {
const ratio = getContrastRatio('#ffff00', '#ffffff')
expect(ratio).toBeGreaterThan(1.0)
expect(ratio).toBeLessThan(1.2)
})
it('accepts uppercase hex', () => {
const lower = getContrastRatio('#1a1a1a', '#ffffff')
const upper = getContrastRatio('#1A1A1A', '#FFFFFF')
expect(upper).toBeCloseTo(lower, 5)
})
it('throws on invalid hex format', () => {
expect(() => getContrastRatio('1a1a1a', '#ffffff')).toThrow()
expect(() => getContrastRatio('#fff', '#ffffff')).toThrow()
expect(() => getContrastRatio('#zzzzzz', '#ffffff')).toThrow()
})
})
describe('isWcagAACompliant', () => {
it('passes for the PDF default primary color (#1a1a1a) on white', () => {
expect(isWcagAACompliant('#1a1a1a', '#ffffff')).toBe(true)
})
it('passes for the PDF default accent color (#666666) on white', () => {
// 5.74:1: comfortably above AA threshold.
expect(isWcagAACompliant('#666666', '#ffffff')).toBe(true)
})
it('fails for pure yellow on white', () => {
expect(isWcagAACompliant('#ffff00', '#ffffff')).toBe(false)
})
// Accounted brand semantic colors. All three are used as DATA-ONLY indicators
// (charts, positive/negative deltas), never as chrome text on white. These
// tests document where they sit relative to AA: terracotta/destructive is
// the only one that comfortably passes AA on white.
it('Accounted terracotta (#c2410c equivalent dark red) passes AA on white', () => {
// 5.91:1: passes AA for normal text.
expect(isWcagAACompliant('#c2410c', '#ffffff')).toBe(true)
})
it('Accounted sage (#84a98c lighter green) fails AA on white', () => {
// ~2.4:1: fails AA, as expected for a soft pastel sage.
expect(isWcagAACompliant('#84a98c', '#ffffff')).toBe(false)
})
it('Accounted ochre (#d4a373 warm yellow) fails AA on white', () => {
// ~2.3:1: fails AA, as expected for a warm soft ochre.
expect(isWcagAACompliant('#d4a373', '#ffffff')).toBe(false)
})
it('a very dark sage (#2d5a3e) passes AA on white', () => {
expect(isWcagAACompliant('#2d5a3e', '#ffffff')).toBe(true)
})
})