A quiet test runner for Haskell
To build and test with all supported compiler versions:
nix build .#testConfigurations.all --no-link
Back in 2011 or so, the most popular Haskell test frameworks generated a lot of status output but relatively little info about why tests failed. John Millikin wrote Chell so that tests would be quiet if they passed, and give to-the-line error info on failure.
It hasn't seen much development effort the past few years. As of February 2019, Chris and Julie are keeping it compiling.
Chell has a small selection of built-in assertions, which cover most simple testing requirements. Use the $assert or $expect functions to run assertions. See the Chell API documentation for full type signatures.
{-# LANGUAGE TemplateHaskell #-}
import Test.Chell
tests :: Suite
tests =
suite "tests"
[ test_Numbers
, test_Text
]
test_Numbers :: Test
test_Numbers =
assertions "numbers" $
do
$assert (equal 1 1)
$assert (greater 2 1)
$assert (equalWithin 1.0001 1.0 0.01)
test_Text :: Test
test_Text =
assertions "text" $
do
let
str1 = "foo\nbar\nbaz"
str2 = "foo\nbar\nqux"
$assert (equalLines str1 str2)
main :: IO ()
main = defaultMain [tests]Chell also supports running QuickCheck properties, via the chell-quickcheck package.
import Test.Chell
import Test.Chell.QuickCheck
tests :: Suite
tests =
suite "tests"
[ test_Equality
, test_Increment
]
test_Equality :: Test
test_Equality = property "equality" (\x -> x == x)
test_Increment :: Test
test_Increment = property "equality" (\x -> x + 1 > x)
main :: IO ()
main = defaultMain [tests]