How to setup extension to run tests on-demand?

[luvicsoura]

I have a sort-of legacy code base with problem tests that are causing Vitest to consume all available RAM and swap space since it runs all the tests on the workspace at start up. Is there a way to set it to only run tests on-demand as we have with the jest extension? I don't have the same issue when running vitest through the terminal, but I can't debug specific test causes using the terminal alone.

[sheremet-va]

Do you use the latest pre-release version?

[luvicsoura]

I'm currently running the stable version, but I'll try that again. In the past when I tried the pre-release it wouldn't work altogether.

[luvicsoura]

@sheremet-va Updating the project's vitest dep to 1.4.x and switching the extension to pre-release (v0.5.6) fixed the issue. Thanks for the insight.

[fregante]

It would be great to have the answer to the question in title since the accepted answer fixes an unrelated problem @sheremet-va

[sheremet-va]

What question? The extension runs tests on demand.

[fregante]

Indeed. However I see that with the extension enabled I get 4 more node processes just by opening VS Code, this matches the number of vitest.config files. The processes stay open for the entire session. Disabling the extension and reloading VS Code does not start them, I'm down to a single node process open.

So now I wonder what they're doing

[sheremet-va]

The extension starts Vitest in standalone mode, asks for test files and parses them when a test file is opened. It also reuses them when running the tests, but it doesn’t run tests on start.