Types of Environment Testings are:

1. Desktop application testing
2. Client server application testing
3. Web application testing

Every application differs in the environment as they are going to test on different different platforms and servers, while moving from desktop to web applications control over the environment can be lost in which application is going to be tested.

Desktop application-> Application runs on personal desktop machine are known as Desktop applications, when we test the desktop application we generally focus on a particular environment. We verify complete application broadly in categories like GUI, functionality, Load, and backend.

Client server application-> Client server application is divided into two different components. The first component i.e, the Application is installed on the server machine while the second component i.e, .exe file is installed on client machine. These applications are generally used to verify functionality, Load, client-server interaction and backend. This environment is mostly used in Intranet networks.

Web application-> Web applications are difficult and complex to test as test engineer does not have control over the application. Application is installed on the server and application .exe file is not installed on the client machine, test engineer has to test it on different web browsers. Web applications are tested on different browsers and OS platforms so generally Web application is tested for browser compatibility issues and operating system compatibility issues and also used for error handling, static pages, backend testing and load testing.