hspec-leancheck

LeanCheck support for the Hspec test framework. https://github.com/rudymatela/hspec-leancheck#readme

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

BSD-3-Clause licensed and maintained by Rudy Matela

hspec-leancheck: LeanCheck support for Hspec

hspec-leancheck’s Build Status hspec-leancheck on Hackage hspec-leancheck on Stackage LTS hspec-leancheck on Stackage Nightly

LeanCheck support for the Hspec test framework.

Installing

$ cabal install hspec-leancheck

Example

Here’s how your spec.hs might look like:

import Test.Hspec
import Test.Hspec.LeanCheck as LC

import Data.List (sort)

main :: IO ()
main = hspec spec

spec :: Spec
spec = do
  describe "sort" $ do
    it "is idempotent" $
      LC.property $ \xs -> sort (sort xs :: [Int]) == sort xs
    it "is identity" $ -- not really
      LC.property $ \xs -> sort (xs :: [Int]) == xs

And here is the output for the above program:

$ ./eg/minimal

sort
  is idempotent
  is identity FAILED [1]

Failures:

  eg/minimal.hs:17:5: 
  1) sort is identity
       [1,0]

  To rerun use: --match "/sort/is identity/"

Randomized with seed 44182769

Finished in 0.0008 seconds
2 examples, 1 failure

Options

Use propertyWith to configure the number of tests.

Further reading

Changes

Changelog for hspec-leancheck

0.0.4

  • improve build scripts

0.0.3

  • export the prop function;
  • export the Property type;
  • improvements in Haddock documentation;
  • improve tests of hspec-leancheck itself;
  • add this changelog.

0.0.2

  • propertyWith -> propertyFor;
  • improvements in documentation.

0.0.1

1st release on Hackage