[Feature] Unit Testing

[MentalGear]

I have read about experimental component testing, but it would be great if we could use playwright also as a unit testing framework for singular functions, so no jest or vitest ist needed alongside. Is this currently already possible ?

[mxschmitt]

This is already possible. You can use @playwright/test as of today for unit testing only. We use it e.g. here or here in such a kind of setup.

The golden rule is there then to just not use the page fixture and no browser gets launched and no browser dependencies need to be installed. Especially creating multiple projects or parameterising the tests is very useful for normal unit testing.

[yury-s]

Closing per the response above, feel free to open a new issue if it doesn't work.

[MentalGear]

Thank you for the detailed answer, @mxschmitt.
I would propose clarifying this in the docs, as it wasn't obvious to me when the full browser is being used and when not.

I'd suggest adding a new page "unit testing" to make it easy and clear to find for use-cases were only function tests are needed when using Playwright.

PS: ui mode is great, yet I wouldn't mind if watch mode were also available just as a cli.

[pavelfeldman]

@MentalGear please feel free to send us a PR that updates the documentation!