Hackage :: [Package]

quickcheck-assertions: HUnit like assertions for QuickCheck

[ lgpl, library, testing ] [ Propose Tags ]

Library with convenient assertions for QuickCheck properties like in HUnit

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Versions 0.1.0, 0.1.1, 0.2.0, 0.3.0
Change log CHANGELOG.md
Dependencies base (==4.*), ieee754, pretty-show, QuickCheck (>=2.3) [details]
License LGPL-3.0-only
Author Aleksey Uymanov
Maintainer s9gf4ult@gmail.com
Category Testing
Home page https://github.com/s9gf4ult/quickcheck-assertions
Source repo head: git clone git://github.com/s9gf4ult/quickcheck-assertions.git
Uploaded by AlekseyUymanov at Tue Jan 17 11:53:56 UTC 2017
Distributions Arch:0.3.0, LTSHaskell:0.3.0, NixOS:0.3.0, Stackage:0.3.0, openSUSE:0.3.0
Downloads 2513 total (32 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2017-01-17 [all 1 reports]
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Readme for quickcheck-assertions-0.3.0

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Module provides convenient functions to do some assertions in QuickCheck properties with pretty printed reasons. For example you can do something like that:

module Main where

import Test.Hspec
import Test.Hspec.QuickCheck
import Test.QuickCheck.Assertions
import Test.QuickCheck.Property

someProp :: Int -> Int -> Result
someProp a b = (a ?> b)

someOtherProp :: Double -> Double -> Result
someOtherProp a b = (a ?== b)
               
main = hspec $ describe "failing test" $ do
  prop "must fail" $ someProp
  prop "must fail again" $ someOtherProp

And receive pretty printed fail message when testing:

failing test
  - must fail FAILED [1]                    
  - must fail again FAILED [2]                             

1) failing test must fail FAILED
*** Failed! (after 1 test): 
>>>>>>>>>>>>>> the value
0
>>>>>>>>>>>>>> should be greater than value
0
0
0


2) failing test must fail again FAILED
*** Failed! (after 2 tests and 4 shrinks): 
>>>>>>>>>>>>>> expected
0.0
>>>>>>>>>>>>>> but got
1.0
0.0
1.0