add(snaplink): add customisation to snapshot reference link

[eduelias]

Summary

Some snapshots I use require special descriptions and there are currently no way to change the description url

Test plan

Ran all the tests and created a new one to check if the functionality works. And it does.

[SimenB]

What's the use case here? Are you using jest-snapshot in a standalone matter? Via a custom matcher?

[rishiraj88]

Thanks, @eduelias

[eduelias]

What's the use case here? Are you using jest-snapshot in a standalone matter? Via a custom matcher?

Hi @SimenB! Thanks for your question! In fact there are two needs here: One, to be able to remove the link altogether in some environments, where we have some strict "no links in code" policy. And the second one to be able to use this link to our own documentation about those snapshots.

[eduelias]

It seems this got a bit stale ... Can someone or approve it or reject it, please? Thanks! :D

[mrazauskas]

If you need this feature in Jest, I am not sure if environmental variable is the best solution. I think it should be at least prefixed: JEST_SNAPSHOT_GUIDE_LINK.

Configuration has snapshotFormat option. Perhaps it could have a property called guideLink or so?

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