Open Stack

Hi,
I am Nitesh. I am new to open stack community. I wanted to know about
tempest,that is, how to write test cases for open stack , how to  test
individual component of open stack. I  referred some open stack
tempest testing documents (github) but unable to get the flow of
testing procedure. Please help me with some kind of documentation or
links from where I can get the flow of testing procedure.

Regards
Nitesh Selkari