mosaic/packages/quality-rails/tests/scaffolder.test.ts

import { mkdtemp, readFile, rm, writeFile } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join } from 'node:path';

import { describe, expect, it } from 'vitest';

import { scaffoldQualityRails } from '../src/scaffolder.js';
import type { RailsConfig } from '../src/types.js';

async function withTempDir(run: (directory: string) => Promise<void>): Promise<void> {
  const directory = await mkdtemp(join(tmpdir(), 'quality-rails-scaffold-'));
  try {
    await run(directory);
  } finally {
    await rm(directory, { recursive: true, force: true });
  }
}

describe('scaffoldQualityRails', () => {
  it('writes expected node quality rails files', async () => {
    await withTempDir(async (directory) => {
      await writeFile(join(directory, 'package.json'), '{"name":"fixture"}\n', 'utf8');

      const previous = process.env.MOSAIC_QUALITY_RAILS_SKIP_INSTALL;
      process.env.MOSAIC_QUALITY_RAILS_SKIP_INSTALL = '1';

      const config: RailsConfig = {
        projectPath: directory,
        kind: 'node',
        profile: 'strict',
        linters: ['eslint', 'biome'],
        formatters: ['prettier'],
        hooks: true,
      };

      const result = await scaffoldQualityRails(config);

      process.env.MOSAIC_QUALITY_RAILS_SKIP_INSTALL = previous;

      await expect(readFile(join(directory, '.eslintrc'), 'utf8')).resolves.toContain('parser');
      await expect(readFile(join(directory, 'biome.json'), 'utf8')).resolves.toContain('"formatter"');
      await expect(readFile(join(directory, '.githooks', 'pre-commit'), 'utf8')).resolves.toContain('pnpm lint');
      await expect(readFile(join(directory, 'PR-CHECKLIST.md'), 'utf8')).resolves.toContain('Code Review Checklist');

      expect(result.filesWritten).toEqual(
        expect.arrayContaining([
          '.eslintrc',
          'biome.json',
          '.githooks/pre-commit',
          'PR-CHECKLIST.md',
        ]),
      );
      expect(result.commandsToRun).toContain('git config core.hooksPath .githooks');
      expect(result.warnings).toHaveLength(0);
    });
  });
});