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

Summary

Sending API requests allows you to inspect the responses and check that the API call is working the way you want it to. This is a manual process, though, and often you will need to create tests that can be run over and over again to check for product regressions. In order to do this, you need to be able to add checks to a request. This chapter has given you the ability to do that. You have learned how to add assertions that check various aspects of an API response. You have also learned about the various built in assertions that Postman provides to help you with this.

Sometimes you need to get some input data into a specific format in order to be able to check the things that you want to check. This chapter has also helped you learn how to set up scripts that can run before a request so that you can have everything in the necessary state. I also showed you how to run a request multiple times so that you can check many things in one request. This chapter also covered how...