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tasty-leancheck: LeanCheck support for the Tasty test framework.

[ bsd3, library, testing ] [ Propose Tags ]

LeanCheck support for the Tasty test framework.

This package can be used to incorporate LeanCheck tests into Tasty test suites.

Please see the Haddock documentation and README for more details.

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Versions [RSS] [faq] 0.0.1, 0.0.2
Dependencies base (==4.*), leancheck, tasty [details]
License BSD-3-Clause
Author Rudy Matela <rudy@matela.com.br>
Maintainer Rudy Matela <rudy@matela.com.br>
Category Testing
Home page https://github.com/rudymatela/tasty-leancheck#readme
Source repo head: git clone https://github.com/rudymatela/tasty-leancheck
this: git clone https://github.com/rudymatela/tasty-leancheck(tag v0.0.2)
Uploaded by rudymatela at 2021-06-15T00:17:38Z
Distributions LTSHaskell:0.0.2, NixOS:0.0.2, Stackage:0.0.2
Downloads 839 total (10 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by Bayesian average]
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2021-06-15 [all 1 reports]

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Readme for tasty-leancheck-0.0.2

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tasty-leancheck: LeanCheck support for Tasty

tasty-leancheck's Build Status tasty-leancheck on Hackage tasty-leancheck on Stackage LTS tasty-leancheck on Stackage Nightly

LeanCheck support for the Tasty test framework. Tasty and healthy tests.

Installing

$ cabal install tasty-leancheck

Example

(This example is intentionally similar to Tasty's official example.)

Here's how your test.hs might look like:

import Test.Tasty
import Test.Tasty.LeanCheck as LC
import Data.List

main :: IO ()
main = defaultMain tests

tests :: TestTree
tests = testGroup "Test properties checked by LeanCheck"
  [ LC.testProperty "sort == sort . reverse" $
      \list -> sort (list :: [Int]) == sort (reverse list)
  , LC.testProperty "Fermat's little theorem" $
      \x -> ((x :: Integer)^7 - x) `mod` 7 == 0
  -- the following property do not hold
  , LC.testProperty "Fermat's last theorem" $
      \x y z n ->
        (n :: Integer) >= 3 LC.==> x^n + y^n /= (z^n :: Integer)
  ]

And here is the output for the above program:

$ ./test
Test properties checked by LeanCheck
  sort == sort . reverse:  OK
    +++ OK, passed 200 tests.
  Fermat's little theorem: OK
    +++ OK, passed 200 tests.
  Fermat's last theorem:   FAIL
    *** Failed! Falsifiable (after 71 tests):
    0 0 0 3

1 out of 3 tests failed (0.00s)

Options

The tasty-leancheck provider has only one option, --leancheck-tests:

$ ./test --leancheck-tests 10
Test properties checked by LeanCheck
  sort == sort . reverse:  OK
    +++ OK, passed 10 tests.
  Fermat's little theorem: OK
    +++ OK, passed 10 tests.
  Fermat's last theorem:   OK
    +++ OK, passed 10 tests.

All 3 tests passed (0.00s)

Further reading