[Feature]: make toMatchAriaSnapshot "partial" behavior optional or add "toMatchFullAriaSnapshot"

[lukpsaxo]

🚀 Feature Request

I've been using toMatchAriaSnapshot and its great, thanks!

But one frustration is that as I am building I frequently 1) add a new component 2) run the tests - they pass 3) notice the new component is missing from the snapshot 4) run with --update-snapshots but nothing is generated 5) delete the snapshot completely 6) run again with --update-snapshots 7) apply the patch - and now I have the item in my snapshot.

Example

I'd love a option - isPartialMatch: false or a new matcher toMatchFullAriaSnapshot that error'd if something new appears and when I run with update snapshot, it adds any new items.

Motivation

Personally I am often trying to test for correctness as a priority, so I would rather be explicit and either 1) its hand-crafted and partial matched or 2) its generated by playwright and updated in full.

I didn't expect partial matching to be the default, when I am mostly generating the snapshots automatically. I expect many people use the feature and just don't realize that new components have been added and a test is not updated.

I believe in my place of work that people will add new features and forget to capture those within existing (or new) snapshots - they will just see existing tests pass and not look at them. Then over time the existing snapshots may start to differ from reality.

[Az8th]

This would be nice to have !

it may not be an assertion, but getByText() already have an exact parameter in its options, it may be consistent to keep similar keywords

[lukpsaxo]

@yury-s @pavelfeldman I've been trying this out and there are some significant downsides with the current implementation. Can you re-open this or shall I raise a new issue?

• /children is not deep, it only affects immediate children
• running update snapshot when the children changes, it removes /children so you have to remember to update the snapshot each time, adding multiple children equal
• The initial workflow is - 1. add toMatchAriaSnapshot(``) 2. run update snapshots 3. modify it afterwards. If there was a toMatchAriaSnapshotExact you wouldn't need a 3rd step but could just do it in 2 steps.