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Questions tagged [hunit]

HUnit is a unit testing framework for Haskell, similar to JUnit for Java.

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Pattern for generic unit test of type class instance implementations in Haskell

I was wondering if there was a known pattern for writing generic unit test code whose purpose it is to check (as a black box) the various instance (implementation of) a type class. For example: import Test.HUnit class M a where foo :: a ->…
Sven Williamson
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PutText in haskell HUnit

I have recently been using the HUnit testing framework to run unit tests in haskell. I came across this function PutText and runTestText which takes PutText st as its first argument. However i am not sure how to use this and would like some help in…
Yusuf
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"Could not find module ‘Test.HUnit’" Error when executing Haskell's unittest (HUnit) in CodeRunner

I have simple unit test code for Haskell's HUnit. I use Mac OS X 10.10, and I installed HUnit with cabal install hunit. module TestSafePrelude where import SafePrelude( safeHead ) import Test.HUnit testSafeHeadForEmptyList ::…
prosseek
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Random Word8 duplicate instance declaration during cabal testpack installation

What does the following error message mean when cabal install testpack-2.1.1 has failed: ... Everything above this succeeded with no problems. [22 of 22] Compiling Control.Monad.Cont ( Control/Monad/Cont.hs, dist/build/Control/Monad/Cont.o…
ely
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Mock Database connections in haskell

I am trying to write some simple code in haskell where there is a function performs a simple database query. In order to unit test Iam using HUnit but not sure how I can mock the database connection and query response.
vijaicv
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Haskell: Multiple Assertions in Unit Testing?

I looked up a similar topic and found this snippet of code from here: https://stackoverflow.com/a/21419654/14386048 To quote: Let's assume that we have module SafePrelude.hs: module SafePrelude where safeHead :: [a] -> Maybe a safeHead [] =…
lattejiu
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Haskell Cabal HUnit

I have a project in school where it is required to use import Test.HUnit I have installed it I cabal using cabal install HUnit --lib but when I try to run our code we get this error message: Huffman.hs:8:1: error: Ambiguous module name…
kesha
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Haskell HUnit Function Testing

I'm trying to set up a series of tests for a simple tic tac toe program I've written in Haskell and I'm unable to get past my first test due to a strange error being thrown reading: Tests.hs:11:61: error: * Couldn't match expected type `Int'…
TheRojBlakeV2
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Why won't my test file import my datastructure? Haskell

I am currently writing unit tests for my (very simple) blackjack game and my testfile (Tests.hs) does not seem to import my datastructures that I have declared in the file I am doing unit tests for (HelpFunctions.hs). I can acces the…
Meltdown
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HUnit does not allow to compile test cases if `Nothing == Nothing` condition is present in the test

I have encountered a weird HUnit behavior. It does not allow to compile test cases if Nothing == Nothing condition is present in the test. Here is my code that reproduces this behavior: module TestTest where import Control.Exception import…
altern
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Cabal error: At least the following dependencies are missing:

I am trying to create a test suite for my Haskell/Cabal package using HUnit, and am getting the following error when I run cabal test: matthew@matthew-Gnawty:~/backup/projects/apollo$ cabal test Re-configuring with test suites enabled. If this…
mherzl
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Cabal and HUnit interaction

I am trying to get a simple unit test to work, written in HUnit. The module I have put the test in is named "MyTests". module MyTests where import qualified Test.HUnit as H gamma = H.TestCase (H.assertEqual "foo" 1 1) -- Run the tests from the…
Christophe De Troyer
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Dependency issues running "cabal test" for Haskell

I'm running my first "cabal test" for Haskell, but I get the error: Package has never been configured. Configuring with default flags. If this fails, please run configure manually. Resolving dependencies... Configuring sample-0.1.0.0... cabal: At…
Suavocado
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How to resolve type ambiguity in this unit test

I can't figure out how to annotate the mylast3 test properly: import Test.HUnit mylast :: [a] -> Maybe a mylast [] = Nothing mylast [x] = Just x mylast (_:xs) = mylast xs testsMyLast = [TestCase $ assertEqual "mylast1" (Just 1) $ mylast [1], …
Denis Gorodetskiy
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Comparison for Text.XML.Light.Element in test

I am trying to write a simple hunit-test to verify how a Text.XML.Light.Element is created from a function. The function is: createElement :: String -> String -> XML.Element createElement tg txt = blank_element{ elName = qualName tg ,…
Randomize
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