Stefan HildebrandtandLinus Rath
8af6694152
The prefix-stripping regex only matched an ASCII ":", so a localized prefix from a CJK mail client (e.g. "回复：foo", using the full-width colon U+FF1A) was left in place. On reply this caused the user's own prefix to be stacked on top, growing the subject chain. Accept both ":" and "：" after the prefix token. Adds tests.
57 lines
2.1 KiB
TypeScript
57 lines
2.1 KiB
TypeScript
import { describe, it, expect } from 'vitest';
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import {
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stripSubjectPrefixes,
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buildReplySubject,
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buildForwardSubject,
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} from '@/lib/subject-prefix';
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describe('stripSubjectPrefixes', () => {
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it('strips a chain of mixed-language prefixes', () => {
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expect(stripSubjectPrefixes('Re: AW: WG: foo')).toBe('foo');
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});
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it('strips the Outlook [N] and Eudora *N counters', () => {
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expect(stripSubjectPrefixes('Re[2]: foo')).toBe('foo');
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expect(stripSubjectPrefixes('Re*3: foo')).toBe('foo');
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});
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it('is case-insensitive and idempotent', () => {
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expect(stripSubjectPrefixes('RE: Re: foo')).toBe('foo');
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expect(stripSubjectPrefixes(stripSubjectPrefixes('RE: Re: foo'))).toBe('foo');
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});
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it('strips a Cyrillic token and an ASCII-colon Chinese token', () => {
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expect(stripSubjectPrefixes('Ответ: foo')).toBe('foo');
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expect(stripSubjectPrefixes('回复: foo')).toBe('foo');
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});
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it('strips a token followed by a full-width colon (CJK clients)', () => {
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expect(stripSubjectPrefixes('回复：foo')).toBe('foo');
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expect(stripSubjectPrefixes('回覆：foo')).toBe('foo');
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expect(stripSubjectPrefixes('Re：foo')).toBe('foo');
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});
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it('still does not strip a bare single-letter "R:"', () => {
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expect(stripSubjectPrefixes('R: budget 2024')).toBe('R: budget 2024');
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});
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it('returns "" for empty / null / undefined and leaves clean subjects alone', () => {
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expect(stripSubjectPrefixes('')).toBe('');
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expect(stripSubjectPrefixes(null)).toBe('');
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expect(stripSubjectPrefixes(undefined)).toBe('');
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expect(stripSubjectPrefixes('foo')).toBe('foo');
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});
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});
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describe('buildReplySubject / buildForwardSubject', () => {
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it('replaces a prefix chain (incl. a full-width colon) with the given prefix', () => {
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expect(buildReplySubject('回复：foo', 'Re:')).toBe('Re: foo');
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expect(buildForwardSubject('Re: foo', 'Fwd:')).toBe('Fwd: foo');
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});
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it('prepends to a clean subject and returns the bare prefix for empty input', () => {
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expect(buildReplySubject('foo', 'AW:')).toBe('AW: foo');
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expect(buildReplySubject('', 'AW:')).toBe('AW:');
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});
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});
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