nick8325/quickcheck

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Automatic testing of Haskell programs.

Stars: 790
Forks: 130
Open beginner issues: 0
Indexed issues: 53
Avg merge: 16h 41m
Merged PRs (30d): 2

Dominant language: Haskell
License: No license data
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

53 open issues indexed

Relax superclasses for instance Arbitrary Compose Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

nick8325/quickcheck#481 · 8 comments · 1 reaction · Opened Aug 1, 2026
Use version milestones to label issues and PRs? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

nick8325/quickcheck#475 · Opened Mar 4, 2026
Why there is Fixed and NoShrink, aren't these the same? Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

nick8325/quickcheck#469 · 2 comments · Opened Feb 12, 2026
Cleanup of definitional modules Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#463 · 2 comments · Opened Jan 8, 2026
Clean up NonEmpty Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

nick8325/quickcheck#457 · 1 comment · Opened Dec 17, 2025
Missing bounds for `base` break builds with QuicckCheck-2.17.0.0 (and probably more) Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

nick8325/quickcheck#438 · 2 comments · Opened Oct 7, 2025
Make it clearer that some modules are internals Open

nick8325/quickcheck#430 · 1 reaction · 1 assignee · Opened Jun 13, 2025
The "Hacking Agenda" Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

nick8325/quickcheck#428 · Opened Jun 12, 2025
Many calls to `tabulate` is slow Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

nick8325/quickcheck#416 · Opened Oct 22, 2024
hspec's `around` doesn't wrap shrunk quickcheck tests Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#413 · 3 comments · Opened Jul 19, 2024
Provide a way to check the mean of distribution of test cases' labels Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#409 · 4 comments · Opened Jun 18, 2024
Introduce time-bounded execution Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#402 · 7 comments · Opened May 14, 2024
Use results from previous tests to inform shrinks Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

nick8325/quickcheck#401 · 12 comments · 1 reaction · Opened May 13, 2024
Strictness for crashes interacts in funny ways with shrinking Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

nick8325/quickcheck#400 · Opened May 3, 2024
Events for Test Frameworks Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

nick8325/quickcheck#399 · Opened May 2, 2024
Witnesses of labelledExamples? Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

nick8325/quickcheck#395 · 2 comments · Opened Apr 19, 2024
Printing is slow! Open

performance

nick8325/quickcheck#352 · 3 comments · 1 assignee · Opened Mar 30, 2023
Add generating monotonic functions Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#348 · Opened Dec 7, 2022
haddocks for Test.QuickCheck.Random Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

nick8325/quickcheck#346 · 5 comments · Opened Aug 1, 2022
Generate value only once possible with xorshift random generator? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#341 · Opened Apr 1, 2022
Allow skipping to a specific test number or shrink state Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

nick8325/quickcheck#340 · Opened Mar 28, 2022
RFC: helpers for asserting after pattern match Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#334 · 1 comment · Opened Aug 12, 2021
Combining shrinking with resource usage is seemingly unsupported. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#331 · 12 comments · Opened May 21, 2021
Pretty-show-ing the counterexample. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#328 · 1 comment · Opened Feb 9, 2021
Provide `Shrinks` Applicative?! Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

nick8325/quickcheck#324 · 1 comment · Opened Dec 18, 2020
Semigroup Gen instance Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

nick8325/quickcheck#321 · 2 comments · 1 reaction · Opened Nov 19, 2020
[Feature request] Fair shuffling Open

discussion

Difficulty 5/5 Over a week Newbie friendliness 35/100

nick8325/quickcheck#317 · 2 comments · Opened Oct 7, 2020
Add quickcheck examples to shrinking challenge Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

nick8325/quickcheck#313 · 1 comment · Opened Aug 18, 2020
Color output Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 40/100

nick8325/quickcheck#307 · 4 comments · Opened Jul 8, 2020
Extract Number Wrappers Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#286 · Opened Jan 28, 2020
CoArbitrary1 Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

nick8325/quickcheck#285 · 1 comment · Opened Dec 30, 2019
Test.QuickCheck.Shrinking without Arbitrary Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

nick8325/quickcheck#273 · 1 comment · Opened Nov 8, 2019
`coverTable` is silent if key isn't `tabulate`d Open

discussion

Difficulty 3/5 1-2 days Newbie friendliness 25/100

nick8325/quickcheck#254 · 8 comments · Opened Apr 16, 2019
No print output when test timeout Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

nick8325/quickcheck#250 · 6 comments · Opened Mar 26, 2019
RFC: Create a SuchThat data type that allows call site `suchThat` Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#215 · 8 comments · 2 reactions · Opened Apr 24, 2018
RFC: New method, generate values in (==) equivalence class (for quotient types) Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

nick8325/quickcheck#214 · 3 comments · Opened Apr 12, 2018
Make Arbitrary instance of Integer able to generate large numbers out of the box Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

nick8325/quickcheck#213 · 3 comments · Opened Mar 20, 2018
Set modifiers of a function Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#205 · 1 reaction · Opened Feb 3, 2018
Can we rework Function to get more instances? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#181 · 2 comments · Opened Jul 31, 2017
Run tests on multiple cores Open

performance

nick8325/quickcheck#180 · 9 comments · 1 reaction · 1 assignee · Opened Jul 25, 2017
Internal modules Open

nick8325/quickcheck#177 · 2 comments · 1 reaction · 1 assignee · Opened Jun 21, 2017
Subrandom numbers Open

discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#165 · 1 comment · 1 reaction · Opened May 7, 2017
Arbitrary instance for Char and non-ascii chars Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

nick8325/quickcheck#164 · 7 comments · Opened May 3, 2017
Request for tutorial: How to test complicated stateful systems Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#139 · 40 comments · Opened Dec 21, 2016
generic deriving of Arbitrary Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

nick8325/quickcheck#137 · 4 comments · 2 reactions · Opened Dec 16, 2016
Make compile with UHC Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

nick8325/quickcheck#129 · Opened Dec 5, 2016
Opportunity for Cont/Codensity Open

discussion

Difficulty 5/5 Over a week Newbie friendliness 20/100

nick8325/quickcheck#127 · 4 comments · Opened Nov 19, 2016
‘apply’ and ‘Fn’ for different arities Open

discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#110 · 3 comments · Opened Sep 1, 2016
Property setup/teardown support? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

nick8325/quickcheck#106 · 4 comments · Opened Jul 31, 2016
Generate edge cases Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

nick8325/quickcheck#98 · 20 comments · Opened Jun 30, 2016

nick8325/quickcheck

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