Book Image

API Testing and Development with Postman - Second Edition

By : Dave Westerveld
5 (1)
Book Image

API Testing and Development with Postman - Second Edition

5 (1)
By: Dave Westerveld

Overview of this book

Postman is an invaluable tool for exploration and testing of web APIs and helping testers and developers figure out how an API works. With Postman, you can create effective test automation for any APIs, and this guide will help you unleash its full potential. API Testing and Development with Postman is an invaluable resource for anyone who wants to create a good quality API, but isn't sure how to go about it. This guide will help you unleash the full potential of Postman’s test automation capabilities. A combination of theory coupled with real-world examples will help you learn how to use Postman to create well-designed, documented, and tested APIs. After you’ve familiarized yourself with the theory, you’ll move on to hands-on projects that will teach you how to add test automation to an existing API. You’ll also learn some of the new and powerful features that Postman has that can help you avoid introducing bugs. This second, fully updated edition features new chapters on workflow testing, creating and using mock servers, API security testing, and performance testing. The new and expanded information in this edition will help you future-proof your APIs. By the end of this book, you'll be able to use Postman to set up and run API tests for any API that you are working with.
Table of Contents (12 chapters)
1
API Testing and Development with Postman, Second Edition: API creation, testing, debugging, and management made easy

Creating a data-driven test in Postman

Postman provides tools for running data-driven tests, but in order to use them, you will need a test. This section will show you how to create an actual input file that you can use, and it will then teach you how to create the kind of test that you need for this in Postman. It will also show you how to get data from a file and use that data to compare it to the results of your request.I will show this all to you with a practical example. The example will use the API provided by JSON Placeholder (http://jsonplaceholder.typicode.com). This is a sample API that you can use to get fake data. Before creating a data-driven test, follow these steps:

  1. Add a collection called JSON API.
  2. Add a request to the collection called Users.
  3. Set the request URL to http://jsonplaceholder.typicode.com/users/1 and send the request. You should get back a response with a bunch of data for a user.

Now that you have a working request, let's look at how to set up a data...