Solved: supertest npm send headers node js

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SuperTest is a high-level abstraction for testing HTTP, offering an easy and flexible way for Node.js developers to effectively test their APIs. It works with any test framework, and it’s easily installable via npm.

SuperTest makes it easy to simulate HTTP requests to your server and check the responses, thereby ensuring your application behaves as expected.

Implementing Headers in SuperTest

Sending headers with SuperTest is straightforward – it’s designed to be fluent and easy-to-use. You can include headers while requesting seamless via the .set() function.

const request = require('supertest');
const app = require('../app');

describe('GET /', function() {
 it('responds with json', function(done) {
   request(app)
     .get('/')
     .set('Accept', 'application/json')
     .expect('Content-Type', /json/)
     .expect(200, done);
 });
});

In this code snippet, we’re sending a GET request to the root URL (“/”) of our app. We set the Accept header to “application/json”, indicating that we want a response in JSON format, and then we specify our expectations for the response.

Understanding the Code

Let’s take a deeper dive into the construction of this test:

• request(app): Use the request function imported from ‘supertest’ to create an HTTP request to your server instance, represented by app.
• .get(‘/’): This chains a HTTP GET method to our request, aimed at the root route of our server.
• .set(‘Accept’, ‘application/json’): This sends an “Accept: application/json” header in our request, telling the server to respond with JSON.
• .expect(‘Content-Type’, /json/): This specifies an expectation for the response — we expect the Content-Type header to include “json”.
• .expect(200, done): This is another expectation — we’re expecting a 200 status code in the response. The done function is passed as a callback for when the test completes.

Additional Methods in SuperTest

SuperTest provides many other fluent methods to refine your requests and expectations, offering a very flexible approach to API testing. Some noteworthy methods include:

• .post(path): To make a POST request.
• .put(path): To make a PUT request.
• .delete(path): To make a DELETE request.
• .expect(status[, fn])
• .expect(status, body[, fn])

SuperTest rpm offers developers a robust and intuitive way to test API endpoints, making it a vital tool in a developer’s toolkit for ensuring the quality of web applications.