As per your post, you want an imacros script to test your site.
I have more than 3 years of experience in Software Development and have worked on a variety of projects including script design, material design aPiù
I already have a webscripting framework for imacros in python. depending upon amount of macros I should be able to make you what you need in a day. That being said if the project must be in Java then I can be of no hPiù