Prerequisites

Development

Put those settings inside vimrc,

let g:LanguageClient_devel = 1 " Use rust debug build
let g:LanguageClient_loggingLevel = 'DEBUG' " Use highest logging level

Make necessary changes.
Build. make to build, format and run clippy, or make build to run build only.
Verify changes.
Run tests. (See below section)

(Option 1. Recommended) With docker installed,

make test && make integration-test-docker

(Option 2) Refer Dockerfile to install tests dependencies.

make test && make integration-test