Setup QuickCheck testing

default.nix

@@ -1,7 +1,6 @@
-{ mkDerivation, base, Cabal, cabal-test-quickcheck, extra
-, monad-loops, MonadRandom, pipes, protolude, QuickCheck
-, quickcheck-instances, random, random-fu, random-shuffle, stdenv
-, text
+{ mkDerivation, base, Cabal, extra, monad-loops, MonadRandom, pipes
+, protolude, QuickCheck, quickcheck-instances, random, random-fu
+, random-shuffle, stdenv, text
 }:
 mkDerivation {
   pname = "ga";
@@ -14,13 +13,8 @@ mkDerivation {
     quickcheck-instances random random-fu random-shuffle text
   ];
   executableHaskellDepends = [
-    base extra monad-loops MonadRandom pipes protolude QuickCheck
+    base Cabal extra monad-loops MonadRandom pipes protolude QuickCheck
     quickcheck-instances random random-fu random-shuffle text
   ];
-  testHaskellDepends = [
-    base Cabal cabal-test-quickcheck extra monad-loops MonadRandom
-    pipes protolude QuickCheck quickcheck-instances random random-fu
-    random-shuffle text
-  ];
   license = stdenv.lib.licenses.gpl3;
 }

ga.cabal

@@ -56,14 +56,23 @@ executable ga
                      , SS19
                      , WS19
 
+executable ga-tests
+  build-depends:       base ^>=4.12.0.0
+                     , Cabal
+                     , extra
+                     , MonadRandom
+                     , monad-loops
                      , pipes
                      , protolude
                      , QuickCheck
                      , quickcheck-instances
+                     , random
+                     , random-fu
+                     , random-shuffle
                      , text
   default-language:    Haskell2010
   hs-source-dirs:      src
-  main-is:             Main.hs
+  main-is:             Test.hs
   other-modules:       GA
                      , Seminar
                      , Pretty

src/Seminar.hs

@@ -1,5 +1,6 @@
 {-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TemplateHaskell #-}
 
 module Seminar where
 
@@ -161,3 +162,6 @@ valid :: Assignment -> Bool
 valid a =
   length a == length (nub $ fst <$> a)
     && length a == length (nub $ snd <$> a)
+return []
+
+runTests = $quickCheckAll

src/Test.hs

@@ -0,0 +1,11 @@
+{-# LANGUAGE NoImplicitPrelude #-}
+
+module Main where
+
+import Protolude
+import qualified Seminar
+
+main :: IO ()
+main = do
+  _ <- Seminar.runTests
+  return ()