* test: added newly cases to cover codeCov
* test: added new cases of empty posts
* test: added test cases of legacy topics
* refactor: removed extra lines and extra const objects
* test: added test cases for postPreviewpane
* test: added test cases for post comment view api
* refactor: removed extra lines and code
* refactor: fixed issues identified during code review
* refactor: changed description of one test case
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Co-authored-by: sundasnoreen12 <sundasnoreen12@ggmail.com>
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