buildPursPackage: compile/test properly

Compile all required sources and execute unit tests during the checkPhase.
By default checkPhase is disabled, but can be enabled via `doCheck = true`
as argument to `buildPursPackage`

nix/lib/purescript.nix

@@ -19,14 +19,16 @@
 , webCommon
   # node_modules to use
 , nodeModules
+  # control execution of unit tests
+, doCheck ? false
 }:
 let
   # Cleans the source based on the patterns in ./.gitignore and the additionalIgnores
   cleanSrcs = nix-gitignore.gitignoreSource [ "/*.adoc" "/*.nix" ] src;
 
 in
 stdenv.mkDerivation {
-  inherit name;
+  inherit name doCheck;
   src = cleanSrcs;
   buildInputs = [ nodeModules easyPS.purs easyPS.spago easyPS.psc-package ];
   buildPhase = ''
@@ -37,9 +39,14 @@ stdenv.mkDerivation {
     ln -s ${webCommon} ../web-common
 
     sh ${spagoPackages.installSpagoStyle}
-    sh ${spagoPackages.buildSpagoStyle}
+    sh ${spagoPackages.buildSpagoStyle} src/**/*.purs test/**/*.purs generated/**/*.purs ../web-common/**/*.purs
     ${nodejs}/bin/npm run webpack
   '';
+
+  checkPhase = ''
+    ${nodejs}/bin/node -e 'require("./output/Test.Main").main()'
+  '';
+
   installPhase = ''
     mv dist $out
   '';