Postman

Introduction

Postman is a very useful test automation scripting assist tool when working with many forms of APIs (REST, SOAP, GraphQL, gRPC, etc.), as it allows developers, designers and testers to build API requests and test responses very quickly via a rapid development GUI IDE, as well as the ability to mock the API services for T.D.D. approaches for implementation.

SETUP

The easiest way to install this on Ubuntu is using the snap store, however it is possible to install and setup postman desktop app manually - click here for more details on how to do this manually.

It is also possible to use the cloud solution via a browser (you will need to register a user account on postman) see using the postman web app

Testing the Installation

Open the postman app

Select Collections from the sidebar and then Click on the adjacent '+' button
Add a new collection called Test Postman API
Click on Home from the main menu and then select New...

Enter postman-echo.com/get for the request URL

Click Send
The following will occur:
- The request is sent to the postman API endpoint postman-echo.com/get over HTTP/GET
- The postman-echo REST endpoint receives the GET request and processes it
- The output of the processing is sent as a response back to the source client - in this case the postman desktop app

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