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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
import { GitIgnoreParser } from './gitIgnoreParser.js';
import * as fs from 'fs/promises';
import * as path from 'path';
// Mock fs module
vi.mock('fs/promises');
// Mock gitUtils module
vi.mock('./gitUtils.js', () => ({
isGitRepository: vi.fn(() => true),
findGitRoot: vi.fn(() => '/test/project'),
}));
describe('GitIgnoreParser', () => {
let parser: GitIgnoreParser;
const mockProjectRoot = '/test/project';
beforeEach(() => {
parser = new GitIgnoreParser(mockProjectRoot);
vi.clearAllMocks();
});
afterEach(() => {
vi.restoreAllMocks();
});
describe('initialization', () => {
it('should initialize without errors when no .gitignore exists', async () => {
vi.mocked(fs.readFile).mockRejectedValue(new Error('ENOENT'));
await expect(parser.initialize()).resolves.not.toThrow();
});
it('should load .gitignore patterns when file exists', async () => {
const gitignoreContent = `
# Comment
node_modules/
*.log
dist
.env
`;
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).toContain('.git/**');
expect(patterns).toContain('.git');
expect(patterns).toContain('node_modules/**');
expect(patterns).toContain('**/*.log');
expect(patterns).toContain('**/dist');
expect(patterns).toContain('**/.env');
});
it('should handle git exclude file', async () => {
vi.mocked(fs.readFile).mockImplementation(async (filePath) => {
if (filePath === path.join(mockProjectRoot, '.gitignore')) {
throw new Error('ENOENT');
}
if (
filePath === path.join(mockProjectRoot, '.git', 'info', 'exclude')
) {
return 'temp/\n*.tmp';
}
throw new Error('Unexpected file');
});
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).toContain('temp/**');
expect(patterns).toContain('**/*.tmp');
});
});
describe('pattern parsing', () => {
it('should handle directory patterns correctly', async () => {
const gitignoreContent = 'node_modules/\nbuild/\n';
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).toContain('node_modules/**');
expect(patterns).toContain('build/**');
});
it('should handle file patterns correctly', async () => {
const gitignoreContent = '*.log\n.env\nconfig.json\n';
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).toContain('**/*.log');
expect(patterns).toContain('**/.env');
expect(patterns).toContain('**/config.json');
});
it('should skip comments and empty lines', async () => {
const gitignoreContent = `
# This is a comment
*.log
# Another comment
.env
`;
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).not.toContain('# This is a comment');
expect(patterns).not.toContain('# Another comment');
expect(patterns).toContain('**/*.log');
expect(patterns).toContain('**/.env');
});
it('should skip negation patterns for now', async () => {
const gitignoreContent = '*.log\n!important.log\n';
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).toContain('**/*.log');
expect(patterns).not.toContain('!important.log');
});
it('should handle paths with slashes correctly', async () => {
const gitignoreContent = 'src/*.log\ndocs/temp/\n';
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).toContain('src/*.log');
expect(patterns).toContain('docs/temp/**');
});
});
describe('isIgnored', () => {
beforeEach(async () => {
const gitignoreContent = `
node_modules/
*.log
dist
.env
src/*.tmp
`;
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
});
it('should always ignore .git directory', () => {
expect(parser.isIgnored('.git')).toBe(true);
expect(parser.isIgnored('.git/config')).toBe(true);
expect(parser.isIgnored('.git/objects/abc123')).toBe(true);
});
it('should ignore files matching patterns', () => {
expect(parser.isIgnored('node_modules')).toBe(true);
expect(parser.isIgnored('node_modules/package')).toBe(true);
expect(parser.isIgnored('app.log')).toBe(true);
expect(parser.isIgnored('logs/app.log')).toBe(true);
expect(parser.isIgnored('dist')).toBe(true);
expect(parser.isIgnored('.env')).toBe(true);
expect(parser.isIgnored('config/.env')).toBe(true);
});
it('should ignore files with path-specific patterns', () => {
expect(parser.isIgnored('src/temp.tmp')).toBe(true);
expect(parser.isIgnored('other/temp.tmp')).toBe(false);
});
it('should not ignore files that do not match patterns', () => {
expect(parser.isIgnored('src/index.ts')).toBe(false);
expect(parser.isIgnored('README.md')).toBe(false);
expect(parser.isIgnored('package.json')).toBe(false);
});
it('should handle absolute paths correctly', () => {
const absolutePath = path.join(
mockProjectRoot,
'node_modules',
'package',
);
expect(parser.isIgnored(absolutePath)).toBe(true);
});
it('should handle paths outside project root', () => {
const outsidePath = '/other/project/file.txt';
expect(parser.isIgnored(outsidePath)).toBe(false);
});
it('should handle relative paths correctly', () => {
expect(parser.isIgnored('./node_modules')).toBe(true);
expect(parser.isIgnored('../file.txt')).toBe(false);
});
it('should normalize path separators on Windows', () => {
expect(parser.isIgnored('node_modules\\package')).toBe(true);
expect(parser.isIgnored('src\\temp.tmp')).toBe(true);
});
});
describe('getIgnoredPatterns', () => {
it('should return a copy of patterns array', async () => {
const gitignoreContent = '*.log\n';
vi.mocked(fs.readFile).mockResolvedValue(gitignoreContent);
await parser.initialize();
const patterns1 = parser.getIgnoredPatterns();
const patterns2 = parser.getIgnoredPatterns();
expect(patterns1).not.toBe(patterns2); // Different array instances
expect(patterns1).toEqual(patterns2); // Same content
});
it('should always include .git patterns', async () => {
vi.mocked(fs.readFile).mockRejectedValue(new Error('ENOENT'));
await parser.initialize();
const patterns = parser.getIgnoredPatterns();
expect(patterns).toContain('.git/**');
expect(patterns).toContain('.git');
});
});
});
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