No need to write test case for Regression or stress testing.
it will not be of use.

you will be writing test cases like


1. integration test case
2.Functional Test case
3.Non-Functional Test cases( which include security,
performance and usability)
4.User Acceptance Test cases( end to end scenario).

Validation test case:- Here all the above stated techniques
of test cases fall under validation test cases itself, there
is no seperate test case for validation, when we execute all
the above test cases we can conclude we have done the entire
validation too.

Verificatin test cases:- after writing the entire test cases
there will be some dedicated people who review these test
cases to check whether these test cases written according to
the requirements or not, in such a case it is called
verification test case and when we are executing those test
cases it is called validation test cases.


In  a simple way expected results are verification and
actual results are validation.


Integration test case:- here we execute test cases which
just tells about the connectivity from one module to other
module and integrating one application to other application
and how the application moves from parent node to child node
and vice versa.

Functional Test case:- Here we execute test cases which
tells about the functionality of the application and talks
about the desired output to be seen. internally we have
different type of test cases when we write here like range,
output values , BVA, ECP and so on. We give input and expect
some output according to the SRS.Here we check individual
module completely by checking each and every tab , text box,
buttons and so on.

Non-Functional Test case:- Test cases related to User
friendliness like font, image, color, how easy to navigate
etc, performance related, security related  comes under here.

User Acceptance test case:- These test cases are cruical and
very important to client side people, because these test
case talks about there business and approach of the
application to complete a particular client task. which is
also called as End-End- Business scenario test case. Here we
won;t be doing testing related to UI, Functional or
Non-Functional, we talk about business and scenario which
the application is made for.


This might give you a small ideas for your question. If you
feel this is right do respond to me and if you feel a change
in it also do respond to me stating your contradiction to
it.. which will be helpful to me also.


Hey this might help you.

when you want to do regression testing if you execute all
the above test cases related to it then it is sufficient .
No need to write further or seperate test case.