0.0.1 • Published 3 years ago
jest-fs-mock v0.0.1
jest-mock-fs
Node's fs
mock for jest.
APIs Implemented
fs.readFileSync
fs.readdirSync
fs.writeFileSync
fs.readFile
fs.readdir
fs.writeFile
fs.stat
fs.unlink
fs.mkdir
fs.rmdir
Setup
Step 1: Install library
npm i --save-dev jest-mock-fs
Step 2: Create a mock and re-export library
Inside your tests/__mocks__/fs.js
const fs = require('jest-mock-fs');
module.exports = fs;
Step 3: Add mock
Inside your tests/example.test.js
jest.mock('fs');
const fs = require('fs');
jest.mock('fs');
test('should return content', async () => {
// This will not create an actual file in your file system
fs.writeFileSync('test.txt', 'test');
const content = fs.readFileSync('test.txt', 'utf-8');
expect(content).toBe('test');
});
0.0.1
3 years ago