This book uses the Postman tool for REST service testing. I have used the 6.2.5 version of Postman.
Let's test our first REST resource once you have the Postman—REST client installed. We start the Postman—REST client from either the Start menu or from a shortcut.
By default, the embedded web server starts on port 8080. Therefore, we need to use the http://localhost:8080/<resource> URL for accessing the sample REST application, for example, http://localhost:8080/calculation/sqrt/144.
Once it's started, you can type the Calculation REST URL for sqrt and the value 144 as the path parameter. You can see it in the following screenshot. This URL is entered in the URL (enter request URL here) input field of the Postman extension. By default, the request method is GET. We use the default value for the request method, as we have also...