Split in lib and tests

elna.cabal

@@ -15,19 +15,49 @@ build-type: Simple
 extra-doc-files: TODO README
 
 common warnings
-    ghc-options: -Wall
-
-executable elna
-    import:           warnings
-    main-is:          Main.hs
-    other-modules:
-        Language.Elna.AST
-        Language.Elna.Parser
-    default-extensions:
-        OverloadedStrings
     build-depends:
         base ^>=4.17.2.1,
         megaparsec ^>= 9.6,
         text ^>= 2.0
-    hs-source-dirs:   src
+    ghc-options: -Wall
+    default-extensions:
+        ExplicitForAll,
+        OverloadedStrings
+
+library elna-internal
+    import: warnings
+    exposed-modules:
+        Language.Elna.AST
+        Language.Elna.Parser
+    build-depends:
+        vector >= 0.12 && < 0.14
+    hs-source-dirs: lib
+
+executable elna
+    import: warnings
+    main-is: Main.hs
+    build-depends:
+        elna-internal
+    hs-source-dirs: src
+    default-language: GHC2021
+
+test-suite elna-test
+    import: warnings
+    type: exitcode-stdio-1.0
+    main-is: Spec.hs
+    other-modules:
+        Language.Elna.ParserSpec
+    hs-source-dirs:
+        tests
+    ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
+
+    build-depends:
+        elna-internal,
+        hspec >= 2.10.9 && < 2.12,
+        hspec-expectations ^>= 0.8.2,
+        hspec-megaparsec ^>= 2.2.0,
+        text,
+        vector
+    build-tool-depends:
+        hspec-discover:hspec-discover
     default-language: GHC2021