How can devtools extensions make integration tests?

Hello! I'm resuming work on devtools, and I was wondering:

Since extensions are now installed separately, what's the recommended way of testing them? Because devtool plugins often require a separate app's VM-service URI to work.

Is there an official way to launch plugins and write integration tests for them against a specific app?

No file or test path is named. Start by reviewing how DevTools extensions are installed and how existing integration tests connect to an app's VM-service URI; identify the current extension test entry points. Done means documenting an official, reproducible workflow for launching extensions against a specific app.

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