How to write integration test for custom Bitbucket plugin developed via Atlassian Java SDK

Hi!

I developed a Bitbucket plugin (PostRepositoryHook) using the Atlassian Java SDK. This plugin makes some file changes in the master branch every time after a feature branch merges into the master branch. Right now I am trying to figure out how to write integration tests for this plugin. I have read about the tutorials about how to set up the integration test skeleton (https://developer.atlassian.com/server/framework/atlassian-sdk/generate-and-examine-skeleton-tests/). However I wonder how I can invoke my plugin in the integration test.

The constructor of my PostRepositoryHook plugin has parameters: ContentService and PullRequestService. And the postUpdate method of my PostRepositoryHook plugin has parameters: PostRepositoryHookContext and RepositoryHookRequest. I am not sure where I can fetch these inputs and pass to my PostRepository plugin. 

Also, I am not sure how I can simulate the branch merge action in this integration test environment?

Any help is greatly appreciated!

Thanks!

Sincerely,

Jiawei