Angular Toolkit MCP

import { describe, expect, it, beforeEach, afterEach } from 'vitest'; import { writeFileSync, rmSync, mkdirSync } from 'node:fs'; import { join } from 'node:path'; import { tmpdir } from 'node:os'; import { loadDefaultExport } from './default-export-loader.js'; describe('loadDefaultExport', () => { let testDir: string; beforeEach(() => { testDir = join( tmpdir(), `test-${Date.now()}-${Math.random().toString(36).slice(2)}`, ); mkdirSync(testDir, { recursive: true }); }); afterEach(() => { rmSync(testDir, { recursive: true, force: true }); }); const createFile = (name: string, content: string) => { const path = join(testDir, name); writeFileSync(path, content, 'utf-8'); return path; }; describe('Success Cases', () => { it.each([ { type: 'array', content: '[{name: "test"}]', expected: [{ name: 'test' }], }, { type: 'object', content: '{version: "1.0"}', expected: { version: '1.0' }, }, { type: 'string', content: '"test"', expected: 'test' }, { type: 'null', content: 'null', expected: null }, { type: 'boolean', content: 'false', expected: false }, { type: 'undefined', content: 'undefined', expected: undefined }, ])('should load $type default export', async ({ content, expected }) => { const path = createFile('test.mjs', `export default ${content};`); expect(await loadDefaultExport(path)).toEqual(expected); }); }); describe('Error Cases - No Default Export', () => { it.each([ { desc: 'named exports only', content: 'export const a = 1; export const b = 2;', exports: 'a, b', }, { desc: 'empty module', content: '', exports: 'none' }, { desc: 'comments only', content: '// comment', exports: 'none' }, { desc: 'function exports', content: 'export function fn() {}', exports: 'fn', }, ])('should throw error for $desc', async ({ content, exports }) => { const path = createFile('test.mjs', content); await expect(loadDefaultExport(path)).rejects.toThrow( `No default export found in module. Expected ES Module format:\nexport default [...]\n\nAvailable exports: ${exports}`, ); }); }); describe('Error Cases - File System', () => { it('should throw error when file does not exist', async () => { const path = join(testDir, 'missing.mjs'); await expect(loadDefaultExport(path)).rejects.toThrow( `Failed to load module from ${path}`, ); }); it('should throw error when file has syntax errors', async () => { const path = createFile( 'syntax.mjs', 'export default { invalid: syntax }', ); await expect(loadDefaultExport(path)).rejects.toThrow( `Failed to load module from ${path}`, ); }); }); describe('Edge Cases', () => { it('should work with TypeScript generics', async () => { interface Config { name: string; } const path = createFile('typed.mjs', 'export default [{name: "test"}];'); const result = await loadDefaultExport<Config[]>(path); expect(result).toEqual([{ name: 'test' }]); }); it('should handle mixed exports (prefers default)', async () => { const path = createFile( 'mixed.mjs', 'export const named = "n"; export default "d";', ); expect(await loadDefaultExport<string>(path)).toBe('d'); }); it('should handle complex nested structures', async () => { const path = createFile( 'complex.mjs', ` export default { data: [{ name: 'test', meta: { date: new Date('2024-01-01') } }], version: '1.0' }; `, ); const result = await loadDefaultExport(path); expect(result).toMatchObject({ data: [{ name: 'test', meta: { date: expect.any(Date) } }], version: '1.0', }); }); }); });