What all tests are required to be carried on life boats ?

I have written couple of blog posts on checks and testing of Lifeboats. Please check this out.

Are You Doing All These Checks on Your Davit Type Lifeboats ?

Free Fall Lifeboats: what maintenance is required (and how to do it) ?

These may answer your question. If there is anything more you may require, let me know in the comments to this answer or to any of these blog post.