chore(test): add unit tests and enforce dash-case naming for test files (#3715)
Add ~290 new unit tests covering utils (lru, diff, css, a11y, walk, usage, txt-worker), services (EdgeTTSClient, transformers), and suppress noisy console output across all test files. Rename 27 camelCase test files to dash-case for consistency. Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Huang Xin
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import { describe, test, expect } from 'vitest';
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import { diff } from '@/utils/diff';
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describe('diff', () => {
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describe('identical strings', () => {
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test('returns empty string for identical single-line strings', () => {
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expect(diff('hello', 'hello')).toBe('');
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});
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test('returns empty string for identical multi-line strings', () => {
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const text = 'line one\nline two\nline three';
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expect(diff(text, text)).toBe('');
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});
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test('returns empty string when both strings are empty', () => {
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expect(diff('', '')).toBe('');
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});
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});
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describe('empty inputs', () => {
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test('all lines added when first string is empty', () => {
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const result = diff('', 'alpha\nbeta');
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expect(result).toBe('0a1,2\n> alpha\n> beta');
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});
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test('all lines deleted when second string is empty', () => {
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const result = diff('alpha\nbeta', '');
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expect(result).toBe('1,2d0\n< alpha\n< beta');
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});
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test('single line added from empty', () => {
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const result = diff('', 'only');
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expect(result).toBe('0a1\n> only');
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});
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test('single line deleted to empty', () => {
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const result = diff('only', '');
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expect(result).toBe('1d0\n< only');
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});
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});
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describe('whitespace-only lines filtered', () => {
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test('whitespace-only lines are ignored in both inputs', () => {
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const str1 = 'aaa\n \nbbb';
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const str2 = 'aaa\n\nbbb';
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expect(diff(str1, str2)).toBe('');
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});
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test('strings differing only by blank lines produce empty result', () => {
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const str1 = 'foo\n\n\nbar';
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const str2 = 'foo\nbar';
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expect(diff(str1, str2)).toBe('');
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});
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test('tabs and spaces only lines are filtered out', () => {
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const str1 = 'hello\n\t \t\nworld';
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const str2 = 'hello\nworld';
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expect(diff(str1, str2)).toBe('');
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});
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});
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describe('trimmed comparison', () => {
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test('leading and trailing spaces are ignored when comparing lines', () => {
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const str1 = ' hello \n world ';
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const str2 = 'hello\nworld';
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expect(diff(str1, str2)).toBe('');
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});
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test('tabs are trimmed for comparison', () => {
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const str1 = '\thello\t';
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const str2 = 'hello';
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expect(diff(str1, str2)).toBe('');
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});
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test('mixed whitespace trimmed for comparison', () => {
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const str1 = ' \talpha\t \n beta ';
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const str2 = 'alpha\nbeta';
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expect(diff(str1, str2)).toBe('');
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});
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});
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describe('pure additions', () => {
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test('single line added at end', () => {
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const result = diff('aaa', 'aaa\nbbb');
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expect(result).toBe('1a2\n> bbb');
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});
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test('multiple lines added at end', () => {
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const result = diff('aaa', 'aaa\nbbb\nccc');
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expect(result).toBe('1a2,3\n> bbb\n> ccc');
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});
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test('lines added at beginning', () => {
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// LCS matches 'ccc' at position 0 in both; remaining lines2 entries are additions
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const result = diff('ccc', 'aaa\nbbb\nccc');
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expect(result).toBe('1a2,3\n> bbb\n> ccc');
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});
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test('line added in the middle', () => {
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// LCS matches 'aaa' then 'ccc' at position 1; remaining 'ccc' in lines2 is an addition
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const result = diff('aaa\nccc', 'aaa\nbbb\nccc');
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expect(result).toBe('2a3\n> ccc');
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});
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});
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describe('pure deletions', () => {
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test('single line deleted from end', () => {
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const result = diff('aaa\nbbb', 'aaa');
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expect(result).toBe('2d1\n< bbb');
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});
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test('multiple lines deleted from end', () => {
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const result = diff('aaa\nbbb\nccc', 'aaa');
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expect(result).toBe('2,3d1\n< bbb\n< ccc');
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});
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test('lines deleted from beginning', () => {
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const result = diff('aaa\nbbb\nccc', 'ccc');
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expect(result).toBe('1,2d0\n< aaa\n< bbb');
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});
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test('line deleted from the middle', () => {
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const result = diff('aaa\nbbb\nccc', 'aaa\nccc');
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expect(result).toBe('2d1\n< bbb');
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});
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});
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describe('changes', () => {
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test('single line changed', () => {
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const result = diff('aaa\nbbb\nccc', 'aaa\nxxx\nccc');
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expect(result).toBe('2c2\n< bbb\n---\n> xxx');
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});
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test('multiple lines changed to same count', () => {
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const result = diff('aaa\nbbb\nccc\nddd', 'aaa\nxxx\nyyy\nddd');
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expect(result).toBe('2,3c2,3\n< bbb\n< ccc\n---\n> xxx\n> yyy');
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});
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test('fewer lines changed to more lines', () => {
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const result = diff('aaa\nbbb\nddd', 'aaa\nxxx\nyyy\nzzz\nddd');
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expect(result).toBe('2c2,4\n< bbb\n---\n> xxx\n> yyy\n> zzz');
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});
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test('more lines changed to fewer lines', () => {
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const result = diff('aaa\nbbb\nccc\nzzz\nddd', 'aaa\nxxx\nddd');
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expect(result).toBe('2,4c2\n< bbb\n< ccc\n< zzz\n---\n> xxx');
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});
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test('complete replacement of all lines', () => {
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const result = diff('aaa\nbbb', 'xxx\nyyy');
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expect(result).toBe('1,2c1,2\n< aaa\n< bbb\n---\n> xxx\n> yyy');
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});
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});
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describe('mixed operations', () => {
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test('deletion followed by addition', () => {
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const result = diff('aaa\nbbb\nccc', 'bbb\nccc\nddd');
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expect(result).toBe('1d0\n< aaa\n3a3\n> ddd');
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});
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test('addition followed by deletion', () => {
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// LCS matches 'bbb' and 'ccc'; last line differs so it becomes a change hunk
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const result = diff('bbb\nccc\nddd', 'aaa\nbbb\nccc');
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expect(result).toBe('3c3\n< ddd\n---\n> ccc');
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});
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test('change and addition', () => {
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const result = diff('aaa\nbbb', 'xxx\nbbb\nccc');
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expect(result).toBe('1c1\n< aaa\n---\n> xxx\n2a3\n> ccc');
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});
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test('change and deletion', () => {
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const result = diff('aaa\nbbb\nccc', 'xxx\nbbb');
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expect(result).toBe('1c1\n< aaa\n---\n> xxx\n3d2\n< ccc');
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});
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});
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describe('range format', () => {
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test('single line uses plain number format', () => {
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const result = diff('aaa\nbbb\nccc', 'aaa\nxxx\nccc');
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// hunk header should be "2c2" (single lines, no comma range)
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const header = result.split('\n')[0];
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expect(header).toBe('2c2');
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});
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test('multiple lines use N,M range format', () => {
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const result = diff('aaa\nbbb\nccc\nddd', 'aaa\nxxx\nyyy\nddd');
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const header = result.split('\n')[0];
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expect(header).toBe('2,3c2,3');
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});
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});
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describe('output format details', () => {
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test('deleted lines prefixed with "< "', () => {
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const result = diff('aaa\nbbb', 'aaa');
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expect(result).toContain('< bbb');
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});
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test('added lines prefixed with "> "', () => {
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const result = diff('aaa', 'aaa\nbbb');
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expect(result).toContain('> bbb');
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});
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test('change hunks contain "---" separator', () => {
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const result = diff('aaa', 'bbb');
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const lines = result.split('\n');
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expect(lines).toContain('---');
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});
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test('deletion hunks do not contain "---" separator', () => {
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const result = diff('aaa\nbbb', 'aaa');
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expect(result).not.toContain('---');
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});
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test('addition hunks do not contain "---" separator', () => {
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const result = diff('aaa', 'aaa\nbbb');
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expect(result).not.toContain('---');
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});
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});
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});
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