Supertest Multipart Form-Data - JavaScript

Supertest is a testing library for Node.js that provides a high-level abstraction for testing HTTP servers. It enables you to write tests for your Node.js applications easily and efficiently. Multipart form-data is a type of HTML form data that allows you to upload files along with other data to the server.

Supertest Multipart Form-Data is a module that extends Supertest to include support for sending multipart form-data requests. This module is especially useful when you need to test file uploads in your Node.js application.

Installation

To use Supertest Multipart Form-Data, you need to install Supertest and the FormData package.

npm install supertest
npm install form-data
npm install supertest-multipart

Usage

To use Supertest Multipart Form-Data, you need to create a request object using the request function from Supertest. You then need to use the FormData package to create a multipart form-data object and add any files and fields that you want to include in the request. Finally, you can send the request using the send function from Supertest.

const request = require('supertest');
const FormData = require('form-data');
const fs = require('fs');
const supertestMultipart = require('supertest-multipart');

describe('File upload test', () => {
  it('should upload a file successfully', async () => {
    const form = new FormData();
    form.append('file', fs.createReadStream('./test/test.json'));

    const res = await supertestMultipart(request(app).post('/api/upload'), form);

    expect(res.status).toBe(200);
    expect(res.body).toEqual({ message: 'Upload successful' });
  });
});

Supertest Multipart Form-Data uses the supertestMultipart function to send the multipart form-data request. This function takes the request object created using request and the multipart form-data object created using FormData as its arguments.

Conclusion

Supertest Multipart Form-Data is a simple and powerful module for testing file uploads in your Node.js application. It leverages the power and convenience of Supertest to make writing tests for file uploads quicker and easier than ever before.