Let us first understand the process of Content Management System.There are basically three different aspects of Content Management Systems:
1.Templating
2.Workflow
3.Versioning

Templating
Templating is the process of Layout Design.Initially templates are designed and then content is placed into them.

Workflow
Workflow is the process of assigning the order of the content to be displayed.The same content can might be used at different parts of the web site or the same template used on the first page can be reused in some other page.Setting the order of content or the templates is very crucial and has to be carefully dealt.

Versioning
Versioning is the process of maintaining the version control of the websites and the pages that have gone live.This is very important to track the changes from one release to other and also keep track that correct message/content is displayed at the right time.

The Process
CMS Testing can be performed in the following manner:
1.Identify the Users of the System.
2.Identify the Publishers.
-Management Staff
-Editorial Staff
-Technical Staff
-Creative Staff
-Architectural Staff
3.Identify the roles of each Publisher.