Test Express HTTP Endpoints with Supertest and node:test

What’s the Difference Between a Test Runner and an HTTP Testing Tool?

Create a Project Directory

Create a package.json File

Configure the Project as an ES Module Application

Install Express

Install the HTTP Testing Library

Test HTTP Requests

Run the App Script

Use the node:test Module to Run Tests

Create the route file

Create the app’s test script

Write the test case

Update the app.js script

Run the test

Configure the App’s Web Server

Run the Express.js Web Server

Important Things to Know about Testing HTTP Endpoints

Expectations run in the order of definition

Supertest requests support promises

expect() calls accept the done callback

expect()’s behavior depends on its arguments

The optionalEndFunction callback sends an HTTP request