Ensure new runs by deleting current runner instance when server calls stop function

[gdavidkov]

This pull request includes a small change to the Server class in the packages/server/src/Server.ts file. The change ensures that the runner is deleted when the server is closed to allow another run.

• packages/server/src/Server.ts: Added a line to delete the runner property in the close method to ensure the server can be run again.

[gdavidkov]

@kraenhansen Can you take a look at it? The problem I encounter is that sometimes the window is closed while the tests are being executed, and after that,t I cannot start a new run. I tried to stop and start the server but without luck. The error that I got is A run is already in progress.

[kraenhansen]

Thanks for mention - I don't know why I missed this PR initially 👍 The fix looks reasonable.

Ideally, I would like to add a failing test which gets solved by this fix, to avoid regressions 🤞
Would you be able to implement that test as well?

[gdavidkov]

Yes, I’d be happy to implement that test.

[gdavidkov]

I fixed one more case where the client was disconnected while the tests were running.
There is still one failing test in the CLI package."

[kraenhansen]

Thanks a lot for your suggestions! The failing test in the CLI package had to do with the runner emitting an "end" event before a "start" event, this required quite a bit of refactoring in the resetting code.

I've also refactored the tests you added to use a single client written in TS - please have a look at my changes and add any comments you might have. If you approve, the tests are now passing and we can get this merged and released 👍

(thanks again for your contribution and patience on this).

[gdavidkov]

Thanks for refactoring the tests to use a single TS client! I’ve reviewed your changes and everything looks good to me. I'm approving the PR—please go ahead and merge and release it.