Allow fabricator to access current state

[liamo94]

Added a way to access current state of the fabricated object. While this same behaviour can achieved by using more fabricators and consts, this should give a little more flexibility in the way we use it

[robmosca]

I got a reminder about this PR. Is this still something useful @liamo94? Maybe @Gpx (the original author of this package) wants to check?

[liamo94]

I got a reminder about this PR. Is this still something useful @liamo94? Maybe @Gpx (the original author of this package) wants to check?

Ah forgot about this 😂 , yeah so this was useful for us for like deep objects we fabricate, where say we want the segment id be that of the parent leg. It would just mean we can inline it, so rather than:

const legId = uuid();
const segment = segmentFabricator({ legId }})
const leg = legFabricator({ id: legId, segment }})

we could do:

const leg = legFabricator(leg => ({
  ...leg,
  segment: segmentFabricator({ legId: leg.id }})
})

This is a simple case, but we have use cases where we need to make sure say text for child properties matches those further up the chain

[unblocked]

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