chell

A simple and intuitive library for automated testing.

https://john-millikin.com/software/chell/

Version on this page:0.4@rev:1
LTS Haskell 24.19:0.5.0.2@rev:4
Stackage Nightly 2025-11-07:0.5.0.2@rev:4
Latest on Hackage:0.5.0.2@rev:4

See all snapshots chell appears in

MIT licensed and maintained by John Millikin
This version can be pinned in stack with:chell-0.4@sha256:14853f792d3fab75efc50a9bc4e1493bf5afc8eaee06137f37adad8855ada3be,2217

Module documentation for 0.4

  • Test
    • Test.Chell
Used by 1 package in lts-0.7(full list with versions):
chell-quickcheck

Chell is a simple and intuitive library for automated testing. It natively supports assertion-based testing, and can use companion libraries such as chell-quickcheck to support more complex testing strategies.

An example test suite, which verifies the behavior of artithmetic operators.

{-# LANGUAGE TemplateHaskell #-}

import Test.Chell

tests_Math :: Suite
tests_Math = suite "math"
    [ test_Addition
    , test_Subtraction
    ]

test_Addition :: Test
test_Addition = assertions "addition" $ do
    $expect (equal (2 + 1) 3)
    $expect (equal (1 + 2) 3)

test_Subtraction :: Test
test_Subtraction = assertions "subtraction" $ do
    $expect (equal (2 - 1) 1)
    $expect (equal (1 - 2) (-1))

main :: IO ()
main = defaultMain [tests_Math]

$ ghc --make chell-example.hs
$ ./chell-example
PASS: 2 tests run, 2 tests passed