nick8325 / nick8325/quickcheck

Test.QuickCheck.Shrinking without Arbitrary

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#273 1 comment 0 reactions 0 assignees View on GitHub

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Dominant language
Haskell
Stars
790
Forks
130
Avg merge
16h 41m
Merged PRs (30d)
2

Description

It would be very useful to be able to have stateful shrinkers, as per Test.QuickCheck.Shrinking without having to use the Arbitrary machinary.

e.g. something complementing forAllShrink (forAllShrinkState?) that can take a ShrinkState instance (or manually passing the two relevant functions).

Related to #272

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First steps

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  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading Test.QuickCheck.Shrinking and the forAllShrink entry point, then compare the proposed forAllShrinkState and ShrinkState approaches. Done means stateful shrinking is available without requiring an Arbitrary instance, with the API shape and relevant functions agreed and implemented.

Written by the indexing model from the issue text.

Assessment

Tech stack
haskell
Domain
testing-qa
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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