Book Image

API Testing and Development with Postman

By : Dave Westerveld
1 (1)
Book Image

API Testing and Development with Postman

1 (1)
By: Dave Westerveld

Overview of this book

Postman enables the exploration and testing of web APIs, helping testers and developers figure out how an API works. With Postman, you can create effective test automation for any APIs. If you want to put your knowledge of APIs to work quickly, this practical guide to using Postman will help you get started. The book provides a hands-on approach to learning the implementation and associated methodologies that will have you up and running with Postman in no time. Complete with step-by-step explanations of essential concepts, practical examples, and self-assessment questions, this book begins by taking you through the principles of effective API testing. 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. You'll then be able to try some hands-on projects that will teach you how to add test automation to an already existing API with Postman, and guide you in using Postman to create a well-designed API from scratch. 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 (19 chapters)
1
Section 1: API Testing Theory and Terminology
6
Section 2: Using Postman When Working with an Existing API
13
Section 3: Using Postman to Develop an API

Designing an API

Not everyone starts with the API design, but I think it is the most logical place to start. You could dive right into making the API and let the design emerge organically. Some would argue that this is a more agile approach, but I think that there is some amount of planning required even in the most agile of organizations. I want you to start this challenge by thinking about the API design. Of course, to do that, you are going to need some information on what exactly we are designing!

In order to better understand what we are doing in this chapter, let's look at the application we are going to design an API for.

Setting up the challenge

I have worked through a few examples earlier in this book using an imaginary to-do list application, but for this challenge, we are going to try something a bit more complicated. We are going to design, test, document, and create a simple e-commerce store.

The store will have a list of items displayed on a web page...