Add some playwright ui tests

[ianthomas23]

Add some playwright ui tests, following a similar approach to that used in jupyterlite and pyodide-kernel repositories. Currently there are tests for:

• loading and activating the extension
• opening a new terminal
• creating a new file
• visual image tests for an empty terminal and one after running a few commands

Note hiding file modification times so that tests are repeatable.

More tests will be added in future.

Fixes #20.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
jupyterlite-terminal	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 7, 2024 0:55am

[jtpio]

Maybe there could be a pin on jupyterlite-core here, as new versions may bring some visual changes that would make the UI tests fail?

For example jupyterlite-core==0.5.0 will be based on JupyterLab 4.3 and Notebook 7.3, which may have some CSS changes compared to jupyterlite-core==0.4.x.

[ianthomas23]

Yes, I'll do that.

[ianthomas23]

please update snapshots

[ianthomas23]

please update snapshots

[ianthomas23]

I've moved the deployment-related files into their own deploy directory. Without this running jupyter lite build in the top-level directory finds ui-tests/jupyter-lite.json which causes problems. So now creating a deployment needs to be preceded by cd deploy.

I have tried to modify vercel.json to deal with this extra directory but I evidently haven't done this correctly and I cannot access the vercel build logs. @jtpio Could you take a look at this when you have some time? I think it should just involve changing a couple of the build settings in vercel rather than in the local vercel.json file.

[jtpio]

I've moved the deployment-related files into their own deploy directory

Great, that's something I wanted to do at some point as a follow- up to #28 👍

Without this running jupyter lite build in the top-level directory finds ui-tests/jupyter-lite.json which causes problems

Right, it looks related to this issue in JupyterLite: jupyterlite/jupyterlite#1095

[jtpio]

Looks like we need to update to get the extension from the parent directory now:

Suggested change

	.
	..

[jtpio]

I updated the project settings to the following on Vercel:

[ianthomas23]

Thanks @jtpio, it is all working now.

[jtpio]

Thanks!